Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1130 files changed, 36190 insertions, 0 deletions

diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-0-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-0-1.js
new file mode 100644
index 0000000000..3856ae8cd9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-0-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-0-1
+description: Object.defineProperty must exist as a function
+---*/
+
+var f = Object.defineProperty;
+
+assert.sameValue(typeof(f), "function", 'typeof(f)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-0-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-0-2.js
new file mode 100644
index 0000000000..0e8cfad057
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-0-2.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-0-2
+description: Object.defineProperty must exist as a function taking 3 parameters
+---*/
+
+assert.sameValue(Object.defineProperty.length, 3, 'Object.defineProperty.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-1.js
new file mode 100644
index 0000000000..a700f0931e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-1.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-1-1
+description: Object.defineProperty applied to undefined throws a TypeError
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(undefined, "foo", {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-2.js
new file mode 100644
index 0000000000..5fbd82ad18
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-2.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-1-2
+description: Object.defineProperty applied to null throws a TypeError
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(null, "foo", {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-3.js
new file mode 100644
index 0000000000..074f517829
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-3.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-1-3
+description: >
+    Object.defineProperty applied to number primitive throws a
+    TypeError
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(5, "foo", {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-4.js
new file mode 100644
index 0000000000..ecdc174158
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1-4.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-1-4
+description: >
+    Object.defineProperty applied to string primitive throws a
+    TypeError
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty("hello\nworld\\!", "foo", {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1.js
new file mode 100644
index 0000000000..f0d7bd674a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-1.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-1
+description: >
+    Object.defineProperty throws TypeError if type of first param is
+    not Object
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(true, "foo", {});
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-1.js
new file mode 100644
index 0000000000..870cf114db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-1
+description: >
+    Object.defineProperty - argument 'P' is undefined that converts to
+    string 'undefined'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, undefined, {});
+
+assert(obj.hasOwnProperty("undefined"), 'obj.hasOwnProperty("undefined") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-10.js
new file mode 100644
index 0000000000..e7336435e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-10.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-10
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is a negative number)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, -20, {});
+
+assert(obj.hasOwnProperty("-20"), 'obj.hasOwnProperty("-20") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-11.js
new file mode 100644
index 0000000000..f981ebca50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-11.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-11
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is Infinity)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, Infinity, {});
+
+assert(obj.hasOwnProperty("Infinity"), 'obj.hasOwnProperty("Infinity") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-12.js
new file mode 100644
index 0000000000..6429958577
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-12.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-12
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is +Infinity)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, +Infinity, {});
+
+assert(obj.hasOwnProperty("Infinity"), 'obj.hasOwnProperty("Infinity") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-13.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-13.js
new file mode 100644
index 0000000000..d2ce79aa00
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-13.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-13
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is -Infinity)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, -Infinity, {});
+
+assert(obj.hasOwnProperty("-Infinity"), 'obj.hasOwnProperty("-Infinity") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-14.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-14.js
new file mode 100644
index 0000000000..29ff89bd5f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-14.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-14
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 20 zeros))
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 100000000000000000000, {});
+
+assert(obj.hasOwnProperty("100000000000000000000"), 'obj.hasOwnProperty("100000000000000000000") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-15.js
new file mode 100644
index 0000000000..95186e1b5a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-15.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-15
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 21 zeros))
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1000000000000000000000, {});
+
+assert(obj.hasOwnProperty("1e+21"), 'obj.hasOwnProperty("1e+21") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-16.js
new file mode 100644
index 0000000000..7b567bcaee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-16.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-16
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 22 zeros))
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 10000000000000000000000, {});
+
+assert(obj.hasOwnProperty("1e+22"), 'obj.hasOwnProperty("1e+22") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-17-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-17-1.js
new file mode 100644
index 0000000000..72b4a87427
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-17-1.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-17-1
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1, {});
+
+assert(obj.hasOwnProperty("1"), 'obj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-17.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-17.js
new file mode 100644
index 0000000000..d52fe6c430
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-17.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-17
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1e+20)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1e+20, {});
+
+assert(obj.hasOwnProperty("100000000000000000000"), 'obj.hasOwnProperty("100000000000000000000") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-18.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-18.js
new file mode 100644
index 0000000000..99d389c919
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-18.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-18
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    string (value is 1e+21)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1e+21, {});
+
+assert(obj.hasOwnProperty("1e+21"), 'obj.hasOwnProperty("1e+21") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-19.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-19.js
new file mode 100644
index 0000000000..61b2777fe9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-19.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-19
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    string (value is 1e+22)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1e+22, {});
+
+assert(obj.hasOwnProperty("1e+22"), 'obj.hasOwnProperty("1e+22") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-2.js
new file mode 100644
index 0000000000..aead4fda4b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-2.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-2
+description: >
+    Object.defineProperty - argument 'P' is null that converts to
+    string 'null'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, null, {});
+
+assert(obj.hasOwnProperty("null"), 'obj.hasOwnProperty("null") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-20.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-20.js
new file mode 100644
index 0000000000..adf5a5a54d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-20.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-20
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 0.000001)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 0.000001, {});
+
+assert(obj.hasOwnProperty("0.000001"), 'obj.hasOwnProperty("0.000001") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-21.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-21.js
new file mode 100644
index 0000000000..63087964d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-21.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-21
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 0.0000001)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 0.0000001, {});
+
+assert(obj.hasOwnProperty("1e-7"), 'obj.hasOwnProperty("1e-7") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-22.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-22.js
new file mode 100644
index 0000000000..52691ced6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-22.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-22
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 0.00000001)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 0.00000001, {});
+
+assert(obj.hasOwnProperty("1e-8"), 'obj.hasOwnProperty("1e-8") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-23.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-23.js
new file mode 100644
index 0000000000..5587c2a1d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-23.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-23
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1e-7)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1e-7, {});
+
+assert(obj.hasOwnProperty("1e-7"), 'obj.hasOwnProperty("1e-7") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-24.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-24.js
new file mode 100644
index 0000000000..3f23263180
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-24.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-24
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1e-6)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1e-6, {});
+
+assert(obj.hasOwnProperty("0.000001"), 'obj.hasOwnProperty("0.000001") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-25.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-25.js
new file mode 100644
index 0000000000..831a8141f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-25.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-25
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1e-5)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1e-5, {});
+
+assert(obj.hasOwnProperty("0.00001"), 'obj.hasOwnProperty("0.00001") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-26.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-26.js
new file mode 100644
index 0000000000..27b5f1c9ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-26.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-26
+description: >
+    Object.defineProperty - argument 'P' is an integer that converts
+    to a string (value is 123)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 123, {});
+
+assert(obj.hasOwnProperty("123"), 'obj.hasOwnProperty("123") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-27.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-27.js
new file mode 100644
index 0000000000..5fd691c8f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-27.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-27
+description: >
+    Object.defineProperty - argument 'P' is a decimal that converts to
+    a string (value is 123.456)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 123.456, {});
+
+assert(obj.hasOwnProperty("123.456"), 'obj.hasOwnProperty("123.456") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-28.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-28.js
new file mode 100644
index 0000000000..34dbcd6729
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-28.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-28
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 19 zeros).1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 10000000000000000000.1, {});
+
+assert(obj.hasOwnProperty("10000000000000000000"), 'obj.hasOwnProperty("10000000000000000000") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-29.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-29.js
new file mode 100644
index 0000000000..3a9bbbdbad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-29.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-29
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 20 zeros).1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 100000000000000000000.1, {});
+
+assert(obj.hasOwnProperty("100000000000000000000"), 'obj.hasOwnProperty("100000000000000000000") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-3.js
new file mode 100644
index 0000000000..7795fbed0a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-3.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-3
+description: >
+    Object.defineProperty - argument 'P' is a boolean whose value is
+    false
+---*/
+
+var obj = {};
+Object.defineProperty(obj, false, {});
+
+assert(obj.hasOwnProperty("false"), 'obj.hasOwnProperty("false") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-30.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-30.js
new file mode 100644
index 0000000000..d4c2aef75c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-30.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-30
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 21 zeros).1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 1000000000000000000000.1, {});
+
+assert(obj.hasOwnProperty("1e+21"), 'obj.hasOwnProperty("1e+21") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-31.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-31.js
new file mode 100644
index 0000000000..8bb17e8749
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-31.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-31
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 1(following 22 zeros).1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 10000000000000000000000.1, {});
+
+assert(obj.hasOwnProperty("1e+22"), 'obj.hasOwnProperty("1e+22") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-32.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-32.js
new file mode 100644
index 0000000000..07693a2673
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-32.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-32
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 123.1234567)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 123.1234567, {});
+
+assert(obj.hasOwnProperty("123.1234567"), 'obj.hasOwnProperty("123.1234567") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-33.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-33.js
new file mode 100644
index 0000000000..f7b0ea7f23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-33.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-33
+description: Object.defineProperty - argument 'P' is applied to an empty string
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "", {});
+
+assert(obj.hasOwnProperty(""), 'obj.hasOwnProperty("") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-34.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-34.js
new file mode 100644
index 0000000000..8be5d677bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-34.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-34
+description: Object.defineProperty - argument 'P' is applied to string 'AB  \cd'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "AB\n\\cd", {});
+
+assert(obj.hasOwnProperty("AB\n\\cd"), 'obj.hasOwnProperty("AB\n\\cd") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-35.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-35.js
new file mode 100644
index 0000000000..f8d9ded21b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-35.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-35
+description: >
+    Object.defineProperty - argument 'P' is applied to string
+    'undefined'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "undefined", {});
+
+assert(obj.hasOwnProperty("undefined"), 'obj.hasOwnProperty("undefined") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-36.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-36.js
new file mode 100644
index 0000000000..465db16a17
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-36.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-36
+description: Object.defineProperty - argument 'P' is applied to string 'null'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "null", {});
+
+assert(obj.hasOwnProperty("null"), 'obj.hasOwnProperty("null") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-37.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-37.js
new file mode 100644
index 0000000000..abaa54913b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-37.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-37
+description: >
+    Object.defineProperty - argument 'P' is applied to string
+    '123αβπcd'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "123αβπcd", {});
+
+assert(obj.hasOwnProperty("123αβπcd"), 'obj.hasOwnProperty("123αβπcd") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-38.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-38.js
new file mode 100644
index 0000000000..9df02e80c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-38.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-38
+description: Object.defineProperty - argument 'P' is applied to string '1'
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "1", {});
+
+assert(obj.hasOwnProperty("1"), 'obj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-39.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-39.js
new file mode 100644
index 0000000000..76ac86fbe5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-39.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-39
+description: >
+    Object.defineProperty - argument 'P' is an array that converts to
+    a string
+---*/
+
+var obj = {};
+Object.defineProperty(obj, [1, 2], {});
+
+assert(obj.hasOwnProperty("1,2"), 'obj.hasOwnProperty("1,2") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-4.js
new file mode 100644
index 0000000000..eb87be87d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-4.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-4
+description: >
+    Object.defineProperty - argument 'P' is a boolean whose value is
+    true
+---*/
+
+var obj = {};
+Object.defineProperty(obj, true, {});
+
+assert(obj.hasOwnProperty("true"), 'obj.hasOwnProperty("true") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-40.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-40.js
new file mode 100644
index 0000000000..a447e8eb7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-40.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-40
+description: >
+    Object.defineProperty - argument 'P' is a String Object that
+    converts to a string
+---*/
+
+var obj = {};
+Object.defineProperty(obj, new String("Hello"), {});
+
+assert(obj.hasOwnProperty("Hello"), 'obj.hasOwnProperty("Hello") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-41.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-41.js
new file mode 100644
index 0000000000..4472709e24
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-41.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-41
+description: >
+    Object.defineProperty - argument 'P' is a Boolean Object that
+    converts to a string
+---*/
+
+var obj = {};
+Object.defineProperty(obj, new Boolean(false), {});
+
+assert(obj.hasOwnProperty("false"), 'obj.hasOwnProperty("false") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-42.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-42.js
new file mode 100644
index 0000000000..6f45293a7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-42.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-42
+description: >
+    Object.defineProperty - argument 'P' is a Number Object that
+    converts to a string
+---*/
+
+var obj = {};
+Object.defineProperty(obj, new Number(123), {});
+
+assert(obj.hasOwnProperty("123"), 'obj.hasOwnProperty("123") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-43.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-43.js
new file mode 100644
index 0000000000..7a80d5f8e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-43.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-43
+description: >
+    Object.defineProperty - argument 'P' is an object that has an own
+    toString method
+---*/
+
+var obj = {};
+
+var ownProp = {
+  toString: function() {
+    return "abc";
+  }
+};
+
+Object.defineProperty(obj, ownProp, {});
+
+assert(obj.hasOwnProperty("abc"), 'obj.hasOwnProperty("abc") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-44.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-44.js
new file mode 100644
index 0000000000..a6d7429de0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-44.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-44
+description: >
+    Object.defineProperty - argument 'P' is an object that has an own
+    valueOf method
+---*/
+
+var obj = {};
+
+var ownProp = {
+  valueOf: function() {
+    return "abc";
+  },
+  toString: undefined
+};
+
+Object.defineProperty(obj, ownProp, {});
+
+assert(obj.hasOwnProperty("abc"), 'obj.hasOwnProperty("abc") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-45.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-45.js
new file mode 100644
index 0000000000..2156a69401
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-45.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-45
+description: >
+    Object.defineProperty - argument 'P' is an object whose toString
+    method returns an object and whose valueOf method returns a
+    primitive value
+---*/
+
+var obj = {};
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var ownProp = {
+  toString: function() {
+    toStringAccessed = true;
+    return {};
+  },
+  valueOf: function() {
+    valueOfAccessed = true;
+    return "abc";
+  }
+};
+
+Object.defineProperty(obj, ownProp, {});
+
+assert(obj.hasOwnProperty("abc"), 'obj.hasOwnProperty("abc") !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-46.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-46.js
new file mode 100644
index 0000000000..bf15ec924f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-46.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-46
+description: >
+    Object.defineProperty - argument 'P' is an object that has an own
+    toString and valueOf method
+---*/
+
+var obj = {};
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var ownProp = {
+  toString: function() {
+    toStringAccessed = true;
+    return "abc";
+  },
+  valueOf: function() {
+    valueOfAccessed = true;
+    return "prop";
+  }
+};
+Object.defineProperty(obj, ownProp, {});
+
+assert(obj.hasOwnProperty("abc"), 'obj.hasOwnProperty("abc") !== true');
+assert.sameValue(valueOfAccessed, false, 'valueOfAccessed');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-47.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-47.js
new file mode 100644
index 0000000000..71303c6e21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-47.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-47
+description: >
+    Object.defineProperty - TypeError exception is thrown  when 'P' is
+    an object that neither toString nor valueOf returns a primitive
+    value
+---*/
+
+var obj = {};
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var ownProp = {
+  toString: function() {
+    toStringAccessed = true;
+    return {};
+  },
+  valueOf: function() {
+    valueOfAccessed = true;
+    return {};
+  }
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, ownProp, {});
+});
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-48.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-48.js
new file mode 100644
index 0000000000..3b997eed54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-48.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-48
+description: >
+    Object.defineProperty - an inherited toString method  is invoked
+    when 'P' is an object with an own valueOf and an inherited
+    toString methods
+---*/
+
+var obj = {};
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var proto = {
+  toString: function() {
+    toStringAccessed = true;
+    return "test";
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+child.valueOf = function() {
+  valueOfAccessed = true;
+  return "10";
+};
+
+Object.defineProperty(obj, child, {});
+
+assert(obj.hasOwnProperty("test"), 'obj.hasOwnProperty("test") !== true');
+assert.sameValue(valueOfAccessed, false, 'valueOfAccessed');
+assert(toStringAccessed, 'toStringAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-5.js
new file mode 100644
index 0000000000..0ea5959bc9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-5.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-5
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is NaN)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, NaN, {});
+
+assert(obj.hasOwnProperty("NaN"), 'obj.hasOwnProperty("NaN") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-6.js
new file mode 100644
index 0000000000..8e8a548982
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-6.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-6
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is 0)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 0, {});
+
+assert(obj.hasOwnProperty("0"), 'obj.hasOwnProperty("0") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-7.js
new file mode 100644
index 0000000000..7725312dc3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-7.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-7
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is +0)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, +0, {});
+
+assert(obj.hasOwnProperty("0"), 'obj.hasOwnProperty("0") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-8.js
new file mode 100644
index 0000000000..fc9b767e59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-8.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-8
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is -0)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, -0, {});
+
+assert(obj.hasOwnProperty("0"), 'obj.hasOwnProperty("0") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-9.js
new file mode 100644
index 0000000000..24b648cb01
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-2-9.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-2-9
+description: >
+    Object.defineProperty - argument 'P' is a number that converts to
+    a string (value is a positive number)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, 30, {});
+
+assert(obj.hasOwnProperty("30"), 'obj.hasOwnProperty("30") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-1.js
new file mode 100644
index 0000000000..f5bb1b783b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-1
+description: >
+    Object.defineProperty throws TypeError if desc has 'get' and
+    'value' present(8.10.5 step 9.a)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var desc = {
+  get: getter,
+  value: 101
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-10.js
new file mode 100644
index 0000000000..7ea5acea6a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-10.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-10
+description: >
+    Object.defineProperty throws TypeError if setter is not callable
+    but not undefined (Number)(8.10.5 step 8.b)
+---*/
+
+var o = {};
+
+// dummy setter
+var setter = 42;
+var desc = {
+  set: setter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js
new file mode 100644
index 0000000000..de37bdae68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-100.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-100
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    null (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: null
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-101.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-101.js
new file mode 100644
index 0000000000..5593c40eac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-101.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-101
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    true (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: true
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js
new file mode 100644
index 0000000000..a0abf592c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-102.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-102
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    false (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js
new file mode 100644
index 0000000000..c9b59463af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-103.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-103
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    0 (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: 0
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js
new file mode 100644
index 0000000000..9ae7f58e48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-104.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-104
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    +0 (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: +0
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js
new file mode 100644
index 0000000000..3055a6ff9f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-105.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-105
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    -0 (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: -0
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js
new file mode 100644
index 0000000000..c6a037f9a6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-106.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-106
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    NaN (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: NaN
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-107.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-107.js
new file mode 100644
index 0000000000..7c154ae5ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-107.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-107
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a positive number (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: 12345
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-108.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-108.js
new file mode 100644
index 0000000000..4aad8d160b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-108.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-108
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a negative number (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: -12345
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js
new file mode 100644
index 0000000000..575c4c9459
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-109.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-109
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    an empty string (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: ""
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-11.js
new file mode 100644
index 0000000000..4b9db99ad5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-11.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-11
+description: >
+    Object.defineProperty throws TypeError if setter is not callable
+    but not undefined (Boolean)(8.10.5 step 8.b)
+---*/
+
+var o = {};
+
+// dummy setter
+var setter = true;
+var desc = {
+  set: setter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-110.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-110.js
new file mode 100644
index 0000000000..91d47c027a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-110.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-110
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a non-empty string (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: "       "
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-111.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-111.js
new file mode 100644
index 0000000000..3a85f1b1c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-111.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-111
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a Function object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: function() {}
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-112.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-112.js
new file mode 100644
index 0000000000..82fc78a52e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-112.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-112
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    an Array object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: [1, 2, 3]
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-113.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-113.js
new file mode 100644
index 0000000000..a60d3b36db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-113.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-113
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a String object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: new String("bbq")
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-114.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-114.js
new file mode 100644
index 0000000000..f826c3cd04
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-114.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-114
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a Boolean object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: new Boolean(true)
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-115.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-115.js
new file mode 100644
index 0000000000..50baf89ad8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-115.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-115
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a Number object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: new Number(0)
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-116.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-116.js
new file mode 100644
index 0000000000..136912c9c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-116.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-116
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    the Math object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: Math
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-117.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-117.js
new file mode 100644
index 0000000000..5b8ab322a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-117.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-117
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a Date object (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: new Date()
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-118.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-118.js
new file mode 100644
index 0000000000..b344727eb1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-118.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-118
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a RegExp object  (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+var attr = {
+  configurable: new RegExp()
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-119.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-119.js
new file mode 100644
index 0000000000..7aa8d47d3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-119.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-119
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    the JSON object  (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+var attr = {
+  configurable: JSON
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-12.js
new file mode 100644
index 0000000000..709fc0f123
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-12.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-12
+description: >
+    Object.defineProperty throws TypeError if setter is not callable
+    but not undefined (String)(8.10.5 step 8.b)
+---*/
+
+var o = {};
+
+// dummy setter
+var setter = "abc";
+var desc = {
+  set: setter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-120.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-120.js
new file mode 100644
index 0000000000..73dcff62fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-120.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-120
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    a Error object  (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+var attr = {
+  configurable: new SyntaxError()
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-121.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-121.js
new file mode 100644
index 0000000000..7f50d0f580
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-121.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-121
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    the Argument object  (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+var argObj = (function() {
+  return arguments;
+})(1, true, "a");
+
+var attr = {
+  configurable: argObj
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-123.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-123.js
new file mode 100644
index 0000000000..52338365b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-123.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-123
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    the global object  (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+var attr = {
+  configurable: this
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-124.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-124.js
new file mode 100644
index 0000000000..a4122cb888
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-124.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-124
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    treated as true when it is a string (value is 'false')  (8.10.5
+    step 4.b)
+---*/
+
+var obj = {};
+
+var attr = {
+  configurable: "false"
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-125.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-125.js
new file mode 100644
index 0000000000..1c8e4c8e52
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-125.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-125
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    treated as true when it is new Boolean(false)  (8.10.5 step 4.b)
+---*/
+
+var obj = {};
+
+var attr = {
+  configurable: new Boolean(false)
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-126.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-126.js
new file mode 100644
index 0000000000..dbebc69ca8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-126.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-126
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is
+    present  (8.10.5 step 5)
+---*/
+
+var obj = {};
+
+var attr = {
+  value: 100
+};
+
+Object.defineProperty(obj, "property", attr);
+
+assert.sameValue(obj.property, 100, 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-127.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-127.js
new file mode 100644
index 0000000000..0ca5fc444a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-127.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-127
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is not
+    present  (8.10.5 step 5)
+---*/
+
+var obj = {};
+
+var attr = {
+  writable: true
+};
+
+Object.defineProperty(obj, "property", attr);
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof(obj.property), "undefined", 'typeof (obj.property)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-129.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-129.js
new file mode 100644
index 0000000000..205e077f24
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-129.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-129
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is an
+    inherited data property  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  value: "inheritedDataProperty"
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "inheritedDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-13.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-13.js
new file mode 100644
index 0000000000..b70fcee363
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-13.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-13
+description: >
+    Object.defineProperty throws TypeError if the setter in desc is
+    not callable (Null)(8.10.5 step 8.b)
+---*/
+
+var o = {};
+
+// dummy setter
+var setter = null;
+var desc = {
+  set: setter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-130.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-130.js
new file mode 100644
index 0000000000..84be9fed20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-130.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-130
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    data property that overrides an inherited data property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  value: "inheritedDataProperty"
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+child.value = "ownDataProperty";
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-131.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-131.js
new file mode 100644
index 0000000000..97807b1632
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-131.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-131
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    data property that overrides an inherited accessor property
+    (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+
+Object.defineProperty(proto, "value", {
+  get: function() {
+    return "inheritedAccessorProperty";
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "value", {
+  value: "ownDataProperty"
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-132.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-132.js
new file mode 100644
index 0000000000..b4ed5928eb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-132.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-132
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    accessor property  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var attr = {};
+Object.defineProperty(attr, "value", {
+  get: function() {
+    return "ownAccessorProperty";
+  }
+});
+
+Object.defineProperty(obj, "property", attr);
+
+assert.sameValue(obj.property, "ownAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-133.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-133.js
new file mode 100644
index 0000000000..88dc6a0f73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-133.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-133
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is an
+    inherited accessor property  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "value", {
+  get: function() {
+    return "inheritedAccessorProperty";
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "inheritedAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-134.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-134.js
new file mode 100644
index 0000000000..3a25f765fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-134.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-134
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    accessor property that overrides an inherited data property
+    (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  value: "inheritedDataProperty"
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "value", {
+  get: function() {
+    return "ownAccessorProperty";
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-135.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-135.js
new file mode 100644
index 0000000000..50198c5ae7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-135.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-135
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    accessor property that overrides an inherited accessor property
+    (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "value", {
+  get: function() {
+    return "inheritedAccessorProperty";
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "value", {
+  get: function() {
+    return "ownAccessorProperty";
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-136.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-136.js
new file mode 100644
index 0000000000..9be927b53b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-136.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-136
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    accessor property without a get function  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var attr = {};
+Object.defineProperty(attr, "value", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", attr);
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof(obj.property), "undefined", 'typeof (obj.property)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-137.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-137.js
new file mode 100644
index 0000000000..1f44e0f8a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-137.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-137
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is own
+    accessor property(without a get function) that overrides an
+    inherited accessor property  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "value", {
+  get: function() {
+    return "inheritedAccessorProperty";
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "value", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof(obj.property), "undefined", 'typeof (obj.property)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-138.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-138.js
new file mode 100644
index 0000000000..a9d91855d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-138.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-138
+description: >
+    Object.defineProperty - 'value' property in 'Attributes' is an
+    inherited accessor property without a get function  (8.10.5 step
+    5.a)
+---*/
+
+var obj = {
+  property: 120
+};
+
+var proto = {};
+Object.defineProperty(proto, "value", {
+  set: function() {}
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof(obj.property), "undefined", 'typeof (obj.property)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-139-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-139-1.js
new file mode 100644
index 0000000000..444ee5bac7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-139-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-139-1
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'value' property
+    of prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Function.prototype.value = "Function";
+var funObj = function(a, b) {
+  return a + b;
+};
+
+Object.defineProperty(obj, "property", funObj);
+
+assert.sameValue(obj.property, "Function", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-139.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-139.js
new file mode 100644
index 0000000000..4f6f504d65
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-139.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-139
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'value' property
+    (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var funObj = function(a, b) {
+  return a + b;
+};
+
+funObj.value = "Function";
+
+Object.defineProperty(obj, "property", funObj);
+
+assert.sameValue(obj.property, "Function", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-14.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-14.js
new file mode 100644
index 0000000000..4cb226bb24
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-14.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-14
+description: >
+    Object.defineProperty throws TypeError if setter is not callable
+    but not undefined (Object)(8.10.5 step 8.b)
+---*/
+
+var o = {};
+
+// dummy getter
+var setter = {
+  a: 1
+};
+var desc = {
+  set: setter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-140-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-140-1.js
new file mode 100644
index 0000000000..4ca9143203
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-140-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-140-1
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Array.prototype.value = "Array";
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(obj, "property", arrObj);
+
+assert.sameValue(obj.property, "Array", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-140.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-140.js
new file mode 100644
index 0000000000..6751452791
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-140.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-140
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var arrObj = [1, 2, 3];
+
+arrObj.value = "Array";
+
+Object.defineProperty(obj, "property", arrObj);
+
+assert.sameValue(obj.property, "Array", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-141-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-141-1.js
new file mode 100644
index 0000000000..0dbe8517ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-141-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-141-1
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+String.prototype.value = "String";
+var strObj = new String("abc");
+
+Object.defineProperty(obj, "property", strObj);
+
+assert.sameValue(obj.property, "String", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-141.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-141.js
new file mode 100644
index 0000000000..25318a61b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-141.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-141
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var strObj = new String("abc");
+
+strObj.value = "String";
+
+Object.defineProperty(obj, "property", strObj);
+
+assert.sameValue(obj.property, "String", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-142-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-142-1.js
new file mode 100644
index 0000000000..afbc09f3c7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-142-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-142-1
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Boolean.prototype.value = "Boolean";
+var boolObj = new Boolean(true);
+
+Object.defineProperty(obj, "property", boolObj);
+
+assert.sameValue(obj.property, "Boolean", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-142.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-142.js
new file mode 100644
index 0000000000..e74f960115
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-142.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-142
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var boolObj = new Boolean(true);
+
+boolObj.value = "Boolean";
+
+Object.defineProperty(obj, "property", boolObj);
+
+assert.sameValue(obj.property, "Boolean", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-143-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-143-1.js
new file mode 100644
index 0000000000..056d1095e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-143-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-143-1
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Number.prototype.value = "Number";
+var numObj = new Number(-2);
+
+Object.defineProperty(obj, "property", numObj);
+
+assert.sameValue(obj.property, "Number", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-143.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-143.js
new file mode 100644
index 0000000000..5b6908dcba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-143.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-143
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var numObj = new Number(-2);
+
+numObj.value = "Number";
+
+Object.defineProperty(obj, "property", numObj);
+
+assert.sameValue(obj.property, "Number", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-144-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-144-1.js
new file mode 100644
index 0000000000..76dca84b34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-144-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-144-1
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Object.prototype.value = "Math";
+
+Object.defineProperty(obj, "property", Math);
+
+assert.sameValue(obj.property, "Math", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-144.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-144.js
new file mode 100644
index 0000000000..8c5e882947
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-144.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-144
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+Math.value = "Math";
+
+Object.defineProperty(obj, "property", Math);
+
+assert.sameValue(obj.property, "Math", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-145-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-145-1.js
new file mode 100644
index 0000000000..facae33e0b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-145-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-145-1
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Date.prototype.value = "Date";
+var dateObj = new Date();
+
+Object.defineProperty(obj, "property", dateObj);
+
+assert.sameValue(obj.property, "Date", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-145.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-145.js
new file mode 100644
index 0000000000..ea29c759b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-145.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-145
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var dateObj = new Date();
+
+dateObj.value = "Date";
+
+Object.defineProperty(obj, "property", dateObj);
+
+assert.sameValue(obj.property, "Date", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-146-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-146-1.js
new file mode 100644
index 0000000000..f6a8b72fd0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-146-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-146-1
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+RegExp.prototype.value = "RegExp";
+var regObj = new RegExp();
+
+Object.defineProperty(obj, "property", regObj);
+
+assert.sameValue(obj.property, "RegExp", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-146.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-146.js
new file mode 100644
index 0000000000..dde77d28c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-146.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-146
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var regObj = new RegExp();
+
+regObj.value = "RegExp";
+
+Object.defineProperty(obj, "property", regObj);
+
+assert.sameValue(obj.property, "RegExp", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-147-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-147-1.js
new file mode 100644
index 0000000000..3d8d1d19fa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-147-1.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-147-1
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Object.prototype.value = "JSON";
+
+Object.defineProperty(obj, "property", JSON);
+
+assert.sameValue(obj.property, "JSON", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-147.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-147.js
new file mode 100644
index 0000000000..c9d65ab79c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-147.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-147
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+JSON.value = "JSON";
+
+Object.defineProperty(obj, "property", JSON);
+
+assert.sameValue(obj.property, "JSON", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-148-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-148-1.js
new file mode 100644
index 0000000000..ca65bd3788
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-148-1.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-148-1
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'value' property of
+    prototype object  (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Error.prototype.value = "Error";
+var errObj = new Error();
+
+Object.defineProperty(obj, "property", errObj);
+
+assert.sameValue(obj.property, "Error", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-148.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-148.js
new file mode 100644
index 0000000000..9b5367a1f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-148.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-148
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'value' property  (8.10.5
+    step 5.a)
+---*/
+
+var obj = {};
+
+var errObj = new Error();
+
+errObj.value = "Error";
+
+Object.defineProperty(obj, "property", errObj);
+
+assert.sameValue(obj.property, "Error", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-149-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-149-1.js
new file mode 100644
index 0000000000..77cbf27119
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-149-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-149-1
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'value' property
+    of prototype object (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+Object.prototype.value = "arguments";
+var argObj = (function() {
+  return arguments;
+})();
+
+
+Object.defineProperty(obj, "property", argObj);
+
+assert.sameValue(obj.property, "arguments", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-149.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-149.js
new file mode 100644
index 0000000000..ec0ba3354a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-149.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-149
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'value' property
+    (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+var argObj = (function() {
+  return arguments;
+})();
+
+argObj.value = "arguments";
+
+Object.defineProperty(obj, "property", argObj);
+
+assert.sameValue(obj.property, "arguments", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-15.js
new file mode 100644
index 0000000000..9cefe1867a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-15.js
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-15
+description: Object.defineProperty - 'Attributes' is undefined  (8.10.5 step 1)
+---*/
+
+var obj = {};
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "property", undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-151.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-151.js
new file mode 100644
index 0000000000..0b2c843f70
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-151.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-151
+description: >
+    Object.defineProperty - 'Attributes' is the global object that
+    uses Object's [[Get]] method to access the 'value' property
+    (8.10.5 step 5.a)
+---*/
+
+var obj = {};
+
+this.value = "global";
+
+Object.defineProperty(obj, "property", this);
+
+assert.sameValue(obj.property, "global", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js
new file mode 100644
index 0000000000..87913b2d2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-152.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-152
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    present (8.10.5 step 6)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var attr = {
+  writable: false
+};
+
+Object.defineProperty(obj, "property", attr);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js
new file mode 100644
index 0000000000..20c3e5c191
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-153.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-153
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is not
+    present  (8.10.5 step 6)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var attr = {
+  value: 100
+};
+
+Object.defineProperty(obj, "property", attr);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-154.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-154.js
new file mode 100644
index 0000000000..cb9d525c84
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-154.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-154
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    data property  (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var attr = {
+  writable: true
+};
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-155.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-155.js
new file mode 100644
index 0000000000..c263509dc6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-155.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-155
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is an
+    inherited data property  (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  writable: true
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-156.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-156.js
new file mode 100644
index 0000000000..92a5f4b5d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-156.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-156
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    data property that overrides an inherited data property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  writable: false
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+child.writable = true;
+
+Object.defineProperty(obj, "property", child);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-157.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-157.js
new file mode 100644
index 0000000000..53ab93c445
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-157.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-157
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    data property that overrides an inherited accessor property
+    (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "writable", {
+  get: function() {
+    return false;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "writable", {
+  value: true
+});
+
+Object.defineProperty(obj, "property", child);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-158.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-158.js
new file mode 100644
index 0000000000..066e92a946
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-158.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-158
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    accessor property  (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var attr = {};
+Object.defineProperty(attr, "writable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-159.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-159.js
new file mode 100644
index 0000000000..409c2ba6c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-159.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-159
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is an
+    inherited accessor property  (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "writable", {
+  get: function() {
+    return true;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-16.js
new file mode 100644
index 0000000000..f1a398eb31
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-16.js
@@ -0,0 +1,13 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-16
+description: Object.defineProperty - 'Attributes' is null (8.10.5 step 1)
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty({}, "property", null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-160.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-160.js
new file mode 100644
index 0000000000..a95d0134bf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-160.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-160
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    accessor property that overrides an inherited data property
+    (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  writable: false
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "writable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-161.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-161.js
new file mode 100644
index 0000000000..6d4f5298e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-161.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-161
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    accessor property that overrides an inherited accessor property
+    (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "writable", {
+  get: function() {
+    return false;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "writable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js
new file mode 100644
index 0000000000..088bb9d5d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-162.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-162
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    accessor property without a get function  (8.10.5 step 6.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var attr = {};
+Object.defineProperty(attr, "writable", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", attr);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js
new file mode 100644
index 0000000000..bfd2ff3dfb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-163.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-163
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is own
+    accessor property(without a get function) that overrides an
+    inherited accessor property  (8.10.5 step 6.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "writable", {
+  get: function() {
+    return true;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "writable", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js
new file mode 100644
index 0000000000..61fe9a5583
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-164.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-164
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is an
+    inherited accessor property without a get function  (8.10.5 step
+    6.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "writable", {
+  set: function() {}
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-165-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-165-1.js
new file mode 100644
index 0000000000..2821ab6772
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-165-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-165-1
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'writable'
+    property of prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Function.prototype.writable = true;
+var funObj = function(a, b) {
+  return a + b;
+};
+
+Object.defineProperty(obj, "property", funObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-165.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-165.js
new file mode 100644
index 0000000000..368e30b6cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-165.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-165
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'writable'
+    property  (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var funObj = function(a, b) {
+  return a + b;
+};
+
+funObj.writable = true;
+
+Object.defineProperty(obj, "property", funObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-166-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-166-1.js
new file mode 100644
index 0000000000..a53286acdb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-166-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-166-1
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Array.prototype.writable = true;
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(obj, "property", arrObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-166.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-166.js
new file mode 100644
index 0000000000..80704d9996
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-166.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-166
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var arrObj = [1, 2, 3];
+
+arrObj.writable = true;
+
+Object.defineProperty(obj, "property", arrObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-167-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-167-1.js
new file mode 100644
index 0000000000..ff940f03d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-167-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-167-1
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+String.prototype.writable = true;
+var strObj = new String("abc");
+
+Object.defineProperty(obj, "property", strObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-167.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-167.js
new file mode 100644
index 0000000000..0f02dbc091
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-167.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-167
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var strObj = new String("abc");
+
+strObj.writable = true;
+
+Object.defineProperty(obj, "property", strObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-168-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-168-1.js
new file mode 100644
index 0000000000..61dfd5e523
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-168-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-168-1
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Boolean.prototype.writable = true;
+var boolObj = new Boolean(true);
+
+Object.defineProperty(obj, "property", boolObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-168.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-168.js
new file mode 100644
index 0000000000..99020bc751
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-168.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-168
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var boolObj = new Boolean(true);
+
+boolObj.writable = true;
+
+Object.defineProperty(obj, "property", boolObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-169-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-169-1.js
new file mode 100644
index 0000000000..19b93a5881
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-169-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-169-1
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Number.prototype.writable = true;
+var numObj = new Number(-2);
+
+Object.defineProperty(obj, "property", numObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-169.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-169.js
new file mode 100644
index 0000000000..ea310b7838
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-169.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-169
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var numObj = new Number(-2);
+
+numObj.writable = true;
+
+Object.defineProperty(obj, "property", numObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-17.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-17.js
new file mode 100644
index 0000000000..620d5c9a68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-17.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-17
+description: >
+    Object.defineProperty - 'Attributes' is a boolean primitive
+    (8.10.5 step 1)
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty({}, "property", true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-170-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-170-1.js
new file mode 100644
index 0000000000..f17040876f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-170-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-170-1
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.prototype.writable = true;
+
+Object.defineProperty(obj, "property", Math);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-170.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-170.js
new file mode 100644
index 0000000000..d51097d001
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-170.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-170
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+Math.writable = true;
+
+Object.defineProperty(obj, "property", Math);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js
new file mode 100644
index 0000000000..d8ee8da884
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-171-1
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+try {
+  Date.prototype.writable = true;
+
+  var dateObj = new Date();
+
+  Object.defineProperty(obj, "property", dateObj);
+  verifyWritable(obj, "property");
+
+} finally {
+  delete Date.prototype.writable;
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171.js
new file mode 100644
index 0000000000..c1ca15e585
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-171.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-171
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var dateObj = new Date();
+
+dateObj.writable = true;
+
+Object.defineProperty(obj, "property", dateObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-172-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-172-1.js
new file mode 100644
index 0000000000..23ae06bbcb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-172-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-172-1
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+RegExp.prototype.writable = true;
+
+var regObj = new RegExp();
+
+Object.defineProperty(obj, "property", regObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-172.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-172.js
new file mode 100644
index 0000000000..842cc036b3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-172.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-172
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var regObj = new RegExp();
+
+regObj.writable = true;
+
+Object.defineProperty(obj, "property", regObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-173-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-173-1.js
new file mode 100644
index 0000000000..612e7243a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-173-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-173-1
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.prototype.writable = true;
+
+Object.defineProperty(obj, "property", JSON);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-173.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-173.js
new file mode 100644
index 0000000000..5a836a9f7d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-173.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-173
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+JSON.writable = true;
+
+Object.defineProperty(obj, "property", JSON);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-174-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-174-1.js
new file mode 100644
index 0000000000..1ffb4062a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-174-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-174-1
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'writable' property of
+    prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Error.prototype.writable = true;
+
+var errObj = new Error();
+
+Object.defineProperty(obj, "property", errObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-174.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-174.js
new file mode 100644
index 0000000000..382ae8cef5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-174.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-174
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'writable' property  (8.10.5
+    step 6.a)
+---*/
+
+var obj = {};
+
+var errObj = new Error();
+
+errObj.writable = true;
+
+Object.defineProperty(obj, "property", errObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-175-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-175-1.js
new file mode 100644
index 0000000000..42774ad55e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-175-1.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-175-1
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'writable'
+    property of prototype object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.prototype.writable = true;
+
+var argObj = (function() {
+  return arguments;
+})();
+
+Object.defineProperty(obj, "property", argObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-175.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-175.js
new file mode 100644
index 0000000000..4c4579eab8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-175.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-175
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'writable'
+    property  (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+var argObj = (function() {
+  return arguments;
+})();
+
+argObj.writable = true;
+
+Object.defineProperty(obj, "property", argObj);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-177.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-177.js
new file mode 100644
index 0000000000..02ca9f73e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-177.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-177
+description: >
+    Object.defineProperty - 'Attributes' is the global object that
+    uses Object's [[Get]] method to access the 'writable' property
+    (8.10.5 step 6.a)
+---*/
+
+var obj = {};
+
+this.writable = true;
+
+Object.defineProperty(obj, "property", this);
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js
new file mode 100644
index 0000000000..42ab36b422
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-178.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-178
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    undefined  (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: undefined
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js
new file mode 100644
index 0000000000..be0fca785e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-179.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-179
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    null  (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: null
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-18.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-18.js
new file mode 100644
index 0000000000..ac40d86a66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-18.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-18
+description: >
+    Object.defineProperty - 'Attributes' is a number primitive (8.10.5
+    step 1)
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty({}, "property", 12);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-180.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-180.js
new file mode 100644
index 0000000000..fcab783b53
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-180.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-180
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    true  (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: true
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js
new file mode 100644
index 0000000000..04a60062e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-181.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-181
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    false  (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: false
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js
new file mode 100644
index 0000000000..e1506931c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-182.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-182
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is 0
+    (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: 0
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js
new file mode 100644
index 0000000000..08b46c555a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-183.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-183
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is +0
+    (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: +0
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js
new file mode 100644
index 0000000000..d456fbeb38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-184.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-184
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is -0
+    (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: -0
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js
new file mode 100644
index 0000000000..81061f91f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-185.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-185
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    NaN  (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: NaN
+});
+
+assert(obj.hasOwnProperty("property"));
+
+verifyNotWritable(obj, "property");
+
+assert.sameValue(typeof(obj.property), "undefined");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-186.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-186.js
new file mode 100644
index 0000000000..37100e18ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-186.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-186
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    positive number  (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: 12345
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-187.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-187.js
new file mode 100644
index 0000000000..39948162d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-187.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-187
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    negative number  (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: -12345
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js
new file mode 100644
index 0000000000..29e6a06d42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-188.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-188
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is an
+    empty string  (8.10.5 step 6.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: ""
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-189.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-189.js
new file mode 100644
index 0000000000..4061bc2094
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-189.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-189
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    non-empty string  (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: "      "
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-19.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-19.js
new file mode 100644
index 0000000000..4206cc47c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-19.js
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-19
+description: >
+    Object.defineProperty - 'Attributes' is a string primitive (8.10.5
+    step 1)
+---*/
+
+assert.throws(TypeError, function() {
+  Object.defineProperty({}, "property", "abc");
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-190.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-190.js
new file mode 100644
index 0000000000..e00b66381d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-190.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-190
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    Function object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: function() {}
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-191.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-191.js
new file mode 100644
index 0000000000..d06e87dbc6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-191.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-191
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is an
+    Array object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: [1, 2, 3]
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-192.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-192.js
new file mode 100644
index 0000000000..e54f72a7a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-192.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-192
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    String object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new String("bbq")
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-193.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-193.js
new file mode 100644
index 0000000000..00d785d147
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-193.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-193
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    Boolean object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new Boolean(true)
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-194.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-194.js
new file mode 100644
index 0000000000..15730be9a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-194.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-194
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    Number object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new Number(123)
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-195.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-195.js
new file mode 100644
index 0000000000..d0372c657a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-195.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-195
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is the
+    Math object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: Math
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-196.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-196.js
new file mode 100644
index 0000000000..708f889f58
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-196.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-196
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    Date object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new Date()
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-197.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-197.js
new file mode 100644
index 0000000000..e08574efe0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-197.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-197
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    RegExp object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new RegExp()
+});
+
+var beforeWrite = obj.hasOwnProperty("property") && typeof obj.property === "undefined";
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert(beforeWrite, 'beforeWrite !== true');
+assert(afterWrite, 'afterWrite !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-198.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-198.js
new file mode 100644
index 0000000000..795b03e85f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-198.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-198
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is the
+    JSON object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: JSON
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-199.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-199.js
new file mode 100644
index 0000000000..787cb597ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-199.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-199
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is a
+    Error object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new SyntaxError()
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-2.js
new file mode 100644
index 0000000000..8d02967050
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-2.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-2
+description: >
+    Object.defineProperty throws TypeError if desc has 'get' and
+    'writable' present(8.10.5 step 9.a)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var desc = {
+  get: getter,
+  writable: false
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-20.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-20.js
new file mode 100644
index 0000000000..3abd3c77bf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-20.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-20
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    present (8.10.5 step 3)
+---*/
+
+var obj = {};
+
+var accessed = false;
+Object.defineProperty(obj, "property", {
+  enumerable: false
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-200.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-200.js
new file mode 100644
index 0000000000..6c4e3f8a8c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-200.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-200
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is the
+    Argument object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+var argObj = (function() {
+  return arguments;
+})(1, true, "a");
+
+Object.defineProperty(obj, "property", {
+  writable: argObj
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-202.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-202.js
new file mode 100644
index 0000000000..4758c979ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-202.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-202
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is the
+    global object (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: this
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-203.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-203.js
new file mode 100644
index 0000000000..fe8837e340
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-203.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-203
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    treated as true when it is a string(value is 'false') (8.10.5 step
+    6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: "false"
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-204.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-204.js
new file mode 100644
index 0000000000..ccc4a78caa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-204.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-204
+description: >
+    Object.defineProperty - 'writable' property in 'Attributes' is
+    treated as true when it is new Boolean(false) (8.10.5 step 6.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: new Boolean(false)
+});
+
+var beforeWrite = obj.hasOwnProperty("property");
+
+obj.property = "isWritable";
+
+var afterWrite = (obj.property === "isWritable");
+
+assert.sameValue(beforeWrite, true, 'beforeWrite');
+assert.sameValue(afterWrite, true, 'afterWrite');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-205.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-205.js
new file mode 100644
index 0000000000..a7b8b486c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-205.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-205
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is present
+    (8.10.5 step 7)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return "present";
+  }
+});
+
+assert.sameValue(obj.property, "present", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-206.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-206.js
new file mode 100644
index 0000000000..f13597bebb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-206.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-206
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is not
+    present (8.10.5 step 7)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  set: function() {}
+});
+
+assert.sameValue(typeof obj.property, "undefined", 'typeof obj.property');
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-207.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-207.js
new file mode 100644
index 0000000000..d5da5ab911
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-207.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-207
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own data
+    property (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+var attributes = {
+  get: function() {
+    return "ownDataProperty";
+  }
+};
+
+Object.defineProperty(obj, "property", attributes);
+
+assert.sameValue(obj.property, "ownDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-208.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-208.js
new file mode 100644
index 0000000000..7891396a3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-208.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-208
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is an
+    inherited data property (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+var proto = {
+  get: function() {
+    return "inheritedDataProperty";
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "inheritedDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-209.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-209.js
new file mode 100644
index 0000000000..07927d8efa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-209.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-209
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own data
+    property that overrides an inherited data property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+var proto = {
+  get: function() {
+    return "inheritedDataProperty";
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+child.get = function() {
+  return "ownDataProperty";
+};
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-21.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-21.js
new file mode 100644
index 0000000000..1225bd4913
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-21.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-21
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    not present (8.10.5 step 3)
+---*/
+
+var obj = {};
+
+var attr = {};
+var accessed = false;
+Object.defineProperty(obj, "property", attr);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-210.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-210.js
new file mode 100644
index 0000000000..c1f4d2c7a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-210.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-210
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own data
+    property that overrides an inherited accessor property (8.10.5
+    step 7.a)
+---*/
+
+var obj = {};
+var proto = {};
+var fun = function() {
+  return "inheritedAccessorProperty";
+};
+Object.defineProperty(proto, "get", {
+  get: function() {
+    return fun;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "get", {
+  value: function() {
+    return "ownDataProperty";
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownDataProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-211.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-211.js
new file mode 100644
index 0000000000..0dfa711f7f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-211.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-211
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own
+    accessor property (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+var attributes = {};
+Object.defineProperty(attributes, "get", {
+  get: function() {
+    return function() {
+      return "ownAccessorProperty";
+    };
+  }
+});
+
+Object.defineProperty(obj, "property", attributes);
+
+assert.sameValue(obj.property, "ownAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-212.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-212.js
new file mode 100644
index 0000000000..657d936f65
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-212.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-212
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is an
+    inherited accessor property (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+var proto = {};
+Object.defineProperty(proto, "get", {
+  get: function() {
+    return function() {
+      return "inheritedAccessorProperty";
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "inheritedAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-213.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-213.js
new file mode 100644
index 0000000000..59e03352dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-213.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-213
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own
+    accessor property that overrides an inherited data property
+    (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+var proto = {
+  get: function() {
+    return "inheritedDataProperty";
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "get", {
+  get: function() {
+    return function() {
+      return "ownAccessorProperty";
+    };
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-214.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-214.js
new file mode 100644
index 0000000000..2306097d3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-214.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-214
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own
+    accessor property that overrides an inherited accessor property
+    (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+var proto = {};
+Object.defineProperty(proto, "get", {
+  get: function() {
+    return function() {
+      return "inheritedAccessorProperty";
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "get", {
+  get: function() {
+    return function() {
+      return "ownAccessorProperty";
+    };
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert.sameValue(obj.property, "ownAccessorProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-215.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-215.js
new file mode 100644
index 0000000000..14e442c9da
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-215.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-215
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own
+    accessor property without a get function (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+var attributes = {};
+Object.defineProperty(attributes, "get", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", attributes);
+
+assert.sameValue(typeof obj.property, "undefined", 'typeof obj.property');
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-216.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-216.js
new file mode 100644
index 0000000000..77017b73bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-216.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-216
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is own
+    accessor property(without a get function) that overrides an
+    inherited accessor property (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+var proto = {};
+Object.defineProperty(proto, "get", {
+  get: function() {
+    return function() {
+      return "inheritedAccessorProperty";
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "get", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof obj.property, "undefined", 'typeof obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-217.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-217.js
new file mode 100644
index 0000000000..4acef5e27a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-217.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-217
+description: >
+    Object.defineProperty - 'get' property in 'Attributes' is an
+    inherited accessor property without a get function (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+var proto = {};
+Object.defineProperty(proto, "get", {
+  set: function() {}
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof obj.property, "undefined", 'typeof obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-218-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-218-1.js
new file mode 100644
index 0000000000..cb6e82d1df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-218-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-218-1
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'get' property of
+    prototype object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Function.prototype.get = function() {
+  return "functionGetProperty";
+};
+var funObj = function() {};
+
+Object.defineProperty(obj, "property", funObj);
+
+assert.sameValue(obj.property, "functionGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-218.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-218.js
new file mode 100644
index 0000000000..bcb7d2e737
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-218.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-218
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'get' property
+    (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+var funObj = function() {};
+
+funObj.get = function() {
+  return "functionGetProperty";
+};
+
+Object.defineProperty(obj, "property", funObj);
+
+assert.sameValue(obj.property, "functionGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-219-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-219-1.js
new file mode 100644
index 0000000000..929f61b361
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-219-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-219-1
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Array.prototype.get = function() {
+  return "arrayGetProperty";
+};
+var arrObj = [];
+
+Object.defineProperty(obj, "property", arrObj);
+
+assert.sameValue(obj.property, "arrayGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-219.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-219.js
new file mode 100644
index 0000000000..f896351a4e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-219.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-219
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var arrObj = [];
+
+arrObj.get = function() {
+  return "arrayGetProperty";
+};
+
+Object.defineProperty(obj, "property", arrObj);
+
+assert.sameValue(obj.property, "arrayGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-22.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-22.js
new file mode 100644
index 0000000000..76730e0b8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-22.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-22
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own data property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: true
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-220-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-220-1.js
new file mode 100644
index 0000000000..3abc78124e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-220-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-220-1
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+String.prototype.get = function() {
+  return "stringGetProperty";
+};
+var strObj = new String();
+
+Object.defineProperty(obj, "property", strObj);
+
+assert.sameValue(obj.property, "stringGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-220.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-220.js
new file mode 100644
index 0000000000..b98621c995
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-220.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-220
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var strObj = new String();
+
+strObj.get = function() {
+  return "stringGetProperty";
+};
+
+Object.defineProperty(obj, "property", strObj);
+
+assert.sameValue(obj.property, "stringGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-221-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-221-1.js
new file mode 100644
index 0000000000..b7c4695599
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-221-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-221-1
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Boolean.prototype.get = function() {
+  return "booleanGetProperty";
+};
+var boolObj = new Boolean(true);
+
+Object.defineProperty(obj, "property", boolObj);
+
+assert.sameValue(obj.property, "booleanGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-221.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-221.js
new file mode 100644
index 0000000000..b8f1d5f22f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-221.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-221
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var boolObj = new Boolean(true);
+
+boolObj.get = function() {
+  return "booleanGetProperty";
+};
+
+Object.defineProperty(obj, "property", boolObj);
+
+assert.sameValue(obj.property, "booleanGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-222-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-222-1.js
new file mode 100644
index 0000000000..654421a5f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-222-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-222-1
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Number.prototype.get = function() {
+  return "numberGetProperty";
+};
+var numObj = new Number(-2);
+
+Object.defineProperty(obj, "property", numObj);
+
+assert.sameValue(obj.property, "numberGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-222.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-222.js
new file mode 100644
index 0000000000..2a47af48ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-222.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-222
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var numObj = new Number(-2);
+
+numObj.get = function() {
+  return "numberGetProperty";
+};
+
+Object.defineProperty(obj, "property", numObj);
+
+assert.sameValue(obj.property, "numberGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-223-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-223-1.js
new file mode 100644
index 0000000000..d594d21a61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-223-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-223-1
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Object.prototype.get = function() {
+  return "mathGetProperty";
+};
+
+Object.defineProperty(obj, "property", Math);
+
+assert.sameValue(obj.property, "mathGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-223.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-223.js
new file mode 100644
index 0000000000..650493171d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-223.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-223
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+Math.get = function() {
+  return "mathGetProperty";
+};
+
+Object.defineProperty(obj, "property", Math);
+
+assert.sameValue(obj.property, "mathGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-224-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-224-1.js
new file mode 100644
index 0000000000..a3511a42d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-224-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-224-1
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Date.prototype.get = function() {
+  return "dateGetProperty";
+};
+var dateObj = new Date();
+
+Object.defineProperty(obj, "property", dateObj);
+
+assert.sameValue(obj.property, "dateGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-224.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-224.js
new file mode 100644
index 0000000000..6a1c6b279a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-224.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-224
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var dateObj = new Date();
+
+dateObj.get = function() {
+  return "dateGetProperty";
+};
+
+Object.defineProperty(obj, "property", dateObj);
+
+assert.sameValue(obj.property, "dateGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-225-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-225-1.js
new file mode 100644
index 0000000000..72106eb354
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-225-1.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-225-1
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+RegExp.prototype.get = function() {
+  return "regExpGetProperty";
+};
+var regObj = new RegExp();
+
+
+Object.defineProperty(obj, "property", regObj);
+
+assert.sameValue(obj.property, "regExpGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-225.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-225.js
new file mode 100644
index 0000000000..5008c418f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-225.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-225
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var regObj = new RegExp();
+
+regObj.get = function() {
+  return "regExpGetProperty";
+};
+
+Object.defineProperty(obj, "property", regObj);
+
+assert.sameValue(obj.property, "regExpGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-226-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-226-1.js
new file mode 100644
index 0000000000..199d32a914
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-226-1.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-226-1
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Object.prototype.get = function() {
+  return "jsonGetProperty";
+};
+
+Object.defineProperty(obj, "property", JSON);
+
+assert.sameValue(obj.property, "jsonGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-226.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-226.js
new file mode 100644
index 0000000000..6d6cbb3f28
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-226.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-226
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+JSON.get = function() {
+  return "jsonGetProperty";
+};
+
+Object.defineProperty(obj, "property", JSON);
+
+assert.sameValue(obj.property, "jsonGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-227-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-227-1.js
new file mode 100644
index 0000000000..24644f07ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-227-1.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-227-1
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'get' property of prototype
+    object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Error.prototype.get = function() {
+  return "errorGetProperty";
+};
+var errObj = new Error();
+
+Object.defineProperty(obj, "property", errObj);
+
+assert.sameValue(obj.property, "errorGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-227.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-227.js
new file mode 100644
index 0000000000..97591f9929
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-227.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-227
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'get' property (8.10.5 step
+    7.a)
+---*/
+
+var obj = {};
+
+var errObj = new Error();
+
+errObj.get = function() {
+  return "errorGetProperty";
+};
+
+Object.defineProperty(obj, "property", errObj);
+
+assert.sameValue(obj.property, "errorGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-228-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-228-1.js
new file mode 100644
index 0000000000..4f61cdd4f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-228-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-228-1
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'get' property of
+    prototype object (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+Object.prototype.get = function() {
+  return "argumentGetProperty";
+};
+var argObj = (function() {
+  return arguments;
+})();
+
+Object.defineProperty(obj, "property", argObj);
+
+assert.sameValue(obj.property, "argumentGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-228.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-228.js
new file mode 100644
index 0000000000..c160ec3db7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-228.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-228
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'get' property
+    (8.10.5 step 7.a)
+---*/
+
+var obj = {};
+
+var argObj = (function() {
+  return arguments;
+})();
+
+argObj.get = function() {
+  return "argumentGetProperty";
+};
+
+Object.defineProperty(obj, "property", argObj);
+
+assert.sameValue(obj.property, "argumentGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-23.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-23.js
new file mode 100644
index 0000000000..4cba7def73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-23.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-23
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    an inherited data property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var proto = {};
+Object.defineProperty(proto, "enumerable", {
+  value: true
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-230.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-230.js
new file mode 100644
index 0000000000..29aa610879
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-230.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-230
+description: >
+    Object.defineProperty - 'Attributes' is the global object that
+    uses Object's [[Get]] method to access the 'get' property (8.10.5
+    step 7.a)
+---*/
+
+var obj = {};
+
+this.get = function() {
+  return "globalGetProperty";
+};
+
+Object.defineProperty(obj, "property", this);
+
+assert.sameValue(obj.property, "globalGetProperty", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-231.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-231.js
new file mode 100644
index 0000000000..93e561661f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-231.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-231
+description: >
+    Object.defineProperty - value of 'get' property in 'Attributes' is
+    undefined (8.10.5 step 7.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  get: undefined
+});
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(typeof obj.property, "undefined", 'typeof obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-232.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-232.js
new file mode 100644
index 0000000000..16b31733f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-232.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-232
+description: >
+    Object.defineProperty - value of 'get' property in 'Attributes' is
+    a function (8.10.5 step 7.b)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return "getFunction";
+  }
+});
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(obj.property, "getFunction", 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-235.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-235.js
new file mode 100644
index 0000000000..4f661cd7e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-235.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-235
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is present
+    (8.10.5 step 8)
+---*/
+
+var obj = {};
+var data = "data";
+
+Object.defineProperty(obj, "property", {
+  set: function(value) {
+    data = value;
+  }
+});
+
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-236.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-236.js
new file mode 100644
index 0000000000..1aade5cdb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-236.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-236
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is not
+    present (8.10.5 step 8)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return 11;
+  }
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-237.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-237.js
new file mode 100644
index 0000000000..9f8700c8bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-237.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-237
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own data
+    property (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Object.defineProperty(obj, "property", {
+  set: function(value) {
+    data = value;
+  }
+});
+
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-238.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-238.js
new file mode 100644
index 0000000000..843bb131ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-238.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-238
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is an
+    inherited data property (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var proto = {
+  set: function(value) {
+    data = value;
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-239.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-239.js
new file mode 100644
index 0000000000..03fdde5785
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-239.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-239
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own data
+    property that overrides an inherited data property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data1 = "data";
+var data2 = "data";
+var proto = {
+  set: function(value) {
+    data1 = value;
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+child.set = function(value) {
+  data2 = value;
+};
+
+Object.defineProperty(obj, "property", child);
+
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data1, "data", 'data1');
+assert.sameValue(data2, "overrideData", 'data2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-24.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-24.js
new file mode 100644
index 0000000000..6de470315b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-24.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-24
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own data property that overrides an inherited data property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var proto = {};
+Object.defineProperty(proto, "enumerable", {
+  value: false
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "enumerable", {
+  value: true
+});
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-240.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-240.js
new file mode 100644
index 0000000000..3c46844005
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-240.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-240
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own data
+    property that overrides an inherited accessor property (8.10.5
+    step 8.a)
+---*/
+
+var obj = {};
+var proto = {};
+var data1 = "data";
+var data2 = "data";
+
+Object.defineProperty(proto, "set", {
+  get: function() {
+    return function(value) {
+      data1 = value;
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "set", {
+  value: function(value) {
+    data2 = value;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data1, "data", 'data1');
+assert.sameValue(data2, "overrideData", 'data2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-241.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-241.js
new file mode 100644
index 0000000000..25a5bcf665
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-241.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-241
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own
+    accessor property (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var attributes = {};
+Object.defineProperty(attributes, "set", {
+  get: function() {
+    return function(value) {
+      data = value;
+    };
+  }
+});
+
+Object.defineProperty(obj, "property", attributes);
+obj.property = "ownAccessorProperty";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "ownAccessorProperty", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-242.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-242.js
new file mode 100644
index 0000000000..96f28c5b37
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-242.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-242
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is an
+    inherited accessor property (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var proto = {};
+var data = "data";
+Object.defineProperty(proto, "set", {
+  get: function() {
+    return function(value) {
+      data = value;
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+obj.property = "inheritedAccessorProperty";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "inheritedAccessorProperty", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-243.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-243.js
new file mode 100644
index 0000000000..b959e3aca5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-243.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-243
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own
+    accessor property that overrides an inherited data property
+    (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data1 = "data";
+var data2 = "data";
+
+var proto = {
+  set: function(value) {
+    data1 = value;
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "set", {
+  get: function() {
+    return function(value) {
+      data2 = value;
+    };
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+obj.property = "ownAccessorProperty";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data1, "data", 'data1');
+assert.sameValue(data2, "ownAccessorProperty", 'data2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-244.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-244.js
new file mode 100644
index 0000000000..418a65251f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-244.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-244
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own
+    accessor property that overrides an inherited accessor property
+    (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var proto = {};
+var data1 = "data";
+var data2 = "data";
+Object.defineProperty(proto, "set", {
+  get: function() {
+    return function(value) {
+      data1 = value;
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "set", {
+  get: function() {
+    return function(value) {
+      data2 = value;
+    };
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+obj.property = "ownAccessorProperty";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data1, "data", 'data1');
+assert.sameValue(data2, "ownAccessorProperty", 'data2');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-245.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-245.js
new file mode 100644
index 0000000000..f7e231e45e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-245.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-245
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own
+    accessor property without a get function (8.10.5 step 8.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var attributes = {};
+Object.defineProperty(attributes, "set", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", attributes);
+
+verifyNotWritable(obj, "property");
+
+var desc = Object.getOwnPropertyDescriptor(obj, "property");
+
+assert(obj.hasOwnProperty("property"));
+assert.sameValue(typeof obj.property, "undefined");
+assert.sameValue(typeof desc.set, "undefined");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-246.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-246.js
new file mode 100644
index 0000000000..1ac0edb30b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-246.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-246
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is own
+    accessor property(without a get function) that overrides an
+    inherited accessor property (8.10.5 step 8.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+var proto = {};
+var data = "data";
+Object.defineProperty(proto, "set", {
+  get: function() {
+    return function(value) {
+      data = value;
+    };
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "set", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", child);
+
+verifyNotWritable(obj, "property");
+
+assert.sameValue(typeof obj.property, "undefined");
+assert.sameValue(data, "data");
+
+assert(obj.hasOwnProperty("property"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-247.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-247.js
new file mode 100644
index 0000000000..7c3f46d87c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-247.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-247
+description: >
+    Object.defineProperty - 'set' property in 'Attributes' is an
+    inherited accessor property without a get function (8.10.5 step
+    8.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+var proto = {};
+Object.defineProperty(proto, "set", {
+  set: function() {}
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-248-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-248-1.js
new file mode 100644
index 0000000000..4edb6fabed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-248-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-248-1
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'set' property of
+    prototype object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Function.prototype.set = function(value) {
+  data = value;
+};
+var funObj = function() {};
+
+Object.defineProperty(obj, "property", funObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-248.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-248.js
new file mode 100644
index 0000000000..22da395e54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-248.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-248
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'set' property
+    (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var funObj = function() {};
+
+funObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", funObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-249-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-249-1.js
new file mode 100644
index 0000000000..de80096156
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-249-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-249-1
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Array.prototype.set = function(value) {
+  data = value;
+};
+var arrObj = [];
+
+Object.defineProperty(obj, "property", arrObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-249.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-249.js
new file mode 100644
index 0000000000..d18e24c996
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-249.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-249
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var arrObj = [];
+
+arrObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", arrObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-25.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-25.js
new file mode 100644
index 0000000000..09d3f967ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-25.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-25
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own data property that overrides an inherited accessor property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var proto = {};
+Object.defineProperty(proto, "enumerable", {
+  get: function() {
+    return false;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "enumerable", {
+  value: true
+});
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-250-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-250-1.js
new file mode 100644
index 0000000000..f3f6bba2f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-250-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-250-1
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+
+String.prototype.set = function(value) {
+  data = value;
+};
+var strObj = new String();
+var data = "data";
+
+Object.defineProperty(obj, "property", strObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-250.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-250.js
new file mode 100644
index 0000000000..e8874f6c3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-250.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-250
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var strObj = new String();
+var data = "data";
+
+strObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", strObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-251-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-251-1.js
new file mode 100644
index 0000000000..e5046e9b66
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-251-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-251-1
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Boolean.prototype.set = function(value) {
+  data = value;
+};
+var boolObj = new Boolean(true);
+
+Object.defineProperty(obj, "property", boolObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-251.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-251.js
new file mode 100644
index 0000000000..3993d7c82a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-251.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-251
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var boolObj = new Boolean(true);
+
+boolObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", boolObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-252-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-252-1.js
new file mode 100644
index 0000000000..07a7559276
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-252-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-252-1
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Number.prototype.set = function(value) {
+  data = value;
+};
+var numObj = new Number(-2);
+
+Object.defineProperty(obj, "property", numObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-252.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-252.js
new file mode 100644
index 0000000000..479421c879
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-252.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-252
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var numObj = new Number(-2);
+
+numObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", numObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-253-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-253-1.js
new file mode 100644
index 0000000000..7327a3e7af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-253-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-253-1
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Object.prototype.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", Math);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-253.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-253.js
new file mode 100644
index 0000000000..1367770594
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-253.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-253
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Math.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", Math);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-254-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-254-1.js
new file mode 100644
index 0000000000..03a59fe2ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-254-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-254-1
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Date.prototype.set = function(value) {
+  data = value;
+};
+var dateObj = new Date();
+
+Object.defineProperty(obj, "property", dateObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-254.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-254.js
new file mode 100644
index 0000000000..53010e849a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-254.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-254
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var dateObj = new Date();
+
+dateObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", dateObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-255-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-255-1.js
new file mode 100644
index 0000000000..01c9632dcd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-255-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-255-1
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+RegExp.prototype.set = function(value) {
+  data = value;
+};
+var regObj = new RegExp();
+
+Object.defineProperty(obj, "property", regObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-255.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-255.js
new file mode 100644
index 0000000000..b51f9ee021
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-255.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-255
+description: >
+    Object.defineProperty - 'Attributes' is a RegExp object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var regObj = new RegExp();
+
+regObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", regObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-256-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-256-1.js
new file mode 100644
index 0000000000..f619c3c185
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-256-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-256-1
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Object.prototype.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", JSON);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-256.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-256.js
new file mode 100644
index 0000000000..af2d5c27b8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-256.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-256
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+JSON.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", JSON);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-257-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-257-1.js
new file mode 100644
index 0000000000..a7c7f0dd85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-257-1.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-257-1
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'set' property of prototype
+    object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Error.prototype.set = function(value) {
+  data = value;
+};
+var errObj = new Error();
+
+Object.defineProperty(obj, "property", errObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-257.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-257.js
new file mode 100644
index 0000000000..ead729262a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-257.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-257
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'set' property (8.10.5 step
+    8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var errObj = new Error();
+
+errObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", errObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-258-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-258-1.js
new file mode 100644
index 0000000000..5d8cdec335
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-258-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-258-1
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'set' property of
+    prototype object (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+Object.prototype.set = function(value) {
+  data = value;
+};
+var argObj = (function() {
+  return arguments;
+})();
+
+Object.defineProperty(obj, "property", argObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-258.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-258.js
new file mode 100644
index 0000000000..c614237e87
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-258.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-258
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'set' property
+    (8.10.5 step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+var argObj = (function() {
+  return arguments;
+})();
+argObj.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", argObj);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-26.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-26.js
new file mode 100644
index 0000000000..17e26a9259
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-26.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-26
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own accessor property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var attr = {};
+Object.defineProperty(attr, "enumerable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", attr);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-260.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-260.js
new file mode 100644
index 0000000000..cee78d4f73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-260.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-260
+description: >
+    Object.defineProperty - 'Attributes' is the global object that
+    uses Object's [[Get]] method to access the 'set' property (8.10.5
+    step 8.a)
+---*/
+
+var obj = {};
+var data = "data";
+
+this.set = function(value) {
+  data = value;
+};
+
+Object.defineProperty(obj, "property", this);
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-261.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-261.js
new file mode 100644
index 0000000000..dbb19915e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-261.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-261
+description: >
+    Object.defineProperty - value of 'set' property in 'Attributes' is
+    undefined (8.10.5 step 8.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  set: undefined
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "property");
+
+assert(obj.hasOwnProperty("property"));
+verifyNotWritable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-262.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-262.js
new file mode 100644
index 0000000000..4c3cb62889
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-262.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-262
+description: >
+    Object.defineProperty - value of 'set' property in 'Attributes' is
+    a function (8.10.5 step 8.b)
+---*/
+
+var obj = {};
+var data = "data";
+
+Object.defineProperty(obj, "property", {
+  set: function(value) {
+    data = value;
+  }
+});
+obj.property = "overrideData";
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(data, "overrideData", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-27.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-27.js
new file mode 100644
index 0000000000..9644362ff2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-27.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-27
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    an inherited accessor property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var proto = {};
+Object.defineProperty(proto, "enumerable", {
+  get: function() {
+    return true;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-28.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-28.js
new file mode 100644
index 0000000000..3a9f78a675
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-28.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-28
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own accessor property that overrides an inherited data property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var proto = {
+  enumerable: false
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(child, "enumerable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-29.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-29.js
new file mode 100644
index 0000000000..34ef15fee6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-29.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-29
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own accessor property that overrides an inherited accessor
+    property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+var proto = {};
+
+Object.defineProperty(proto, "enumerable", {
+  get: function() {
+    return false;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(child, "enumerable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-3.js
new file mode 100644
index 0000000000..b881b648a1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-3.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-3
+description: >
+    Object.defineProperty throws TypeError if desc has 'set' and
+    'value' present(8.10.5 step 9.a)
+---*/
+
+var o = {};
+
+// dummy setter
+var setter = function() {}
+var desc = {
+  set: setter,
+  value: 101
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-30.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-30.js
new file mode 100644
index 0000000000..829bb02117
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-30.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-30
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own accessor property without a get function (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var attr = {};
+Object.defineProperty(attr, "enumerable", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", attr);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-31.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-31.js
new file mode 100644
index 0000000000..b343002b64
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-31.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-31
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    own accessor property(without a get function) that overrides an
+    inherited accessor property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+var proto = {};
+
+Object.defineProperty(proto, "enumerable", {
+  get: function() {
+    return true;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(child, "enumerable", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-32.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-32.js
new file mode 100644
index 0000000000..a938c27750
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-32.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-32
+description: >
+    Object.defineProperty - 'enumerable' property in 'Attributes' is
+    an inherited accessor property without a get function (8.10.5 step
+    3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+var proto = {};
+
+Object.defineProperty(proto, "enumerable", {
+  set: function() {}
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-33-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-33-1.js
new file mode 100644
index 0000000000..08b05b45b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-33-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-33-1
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'enumerable'
+    property of prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Function.prototype.enumerable = true;
+var fun = function() {};
+
+Object.defineProperty(obj, "property", fun);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-33.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-33.js
new file mode 100644
index 0000000000..253bbd6fa8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-33.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-33
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'enumerable'
+    property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var fun = function() {};
+fun.enumerable = true;
+
+Object.defineProperty(obj, "property", fun);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-34-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-34-1.js
new file mode 100644
index 0000000000..02574877dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-34-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-34-1
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Array.prototype.enumerable = true;
+var arrObj = [];
+
+Object.defineProperty(obj, "property", arrObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-34.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-34.js
new file mode 100644
index 0000000000..c3db1bb320
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-34.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-34
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var arrObj = [];
+arrObj.enumerable = true;
+
+Object.defineProperty(obj, "property", arrObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-35-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-35-1.js
new file mode 100644
index 0000000000..0319b48ac4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-35-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-35-1
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+String.prototype.enumerable = true;
+var strObj = new String();
+
+Object.defineProperty(obj, "property", strObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-35.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-35.js
new file mode 100644
index 0000000000..2d4a51c83a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-35.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-35
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var strObj = new String();
+strObj.enumerable = true;
+
+Object.defineProperty(obj, "property", strObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-36-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-36-1.js
new file mode 100644
index 0000000000..3d75971d5d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-36-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-36-1
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Boolean.prototype.enumerable = true;
+var boolObj = new Boolean(true);
+
+Object.defineProperty(obj, "property", boolObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-36.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-36.js
new file mode 100644
index 0000000000..1ac0a9a31b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-36.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-36
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var boolObj = new Boolean(true);
+boolObj.enumerable = true;
+
+Object.defineProperty(obj, "property", boolObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-37-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-37-1.js
new file mode 100644
index 0000000000..abd72173c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-37-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-37-1
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Number.prototype.enumerable = true;
+var numObj = new Number(-2);
+
+Object.defineProperty(obj, "property", numObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-37.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-37.js
new file mode 100644
index 0000000000..8b781bf354
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-37.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-37
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var numObj = new Number(-2);
+numObj.enumerable = true;
+
+Object.defineProperty(obj, "property", numObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-38-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-38-1.js
new file mode 100644
index 0000000000..216e127165
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-38-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-38-1
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.prototype.enumerable = true;
+
+Object.defineProperty(obj, "property", Math);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-38.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-38.js
new file mode 100644
index 0000000000..fc7ca0931a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-38.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-38
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Math.enumerable = true;
+
+Object.defineProperty(obj, "property", Math);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-39-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-39-1.js
new file mode 100644
index 0000000000..af264b53d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-39-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-39-1
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Date.prototype.enumerable = true;
+var dateObj = new Date();
+
+Object.defineProperty(obj, "property", dateObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-39.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-39.js
new file mode 100644
index 0000000000..6dff863697
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-39.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-39
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var dateObj = new Date();
+dateObj.enumerable = true;
+
+Object.defineProperty(obj, "property", dateObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-4.js
new file mode 100644
index 0000000000..6094fafa1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-4.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-4
+description: >
+    Object.defineProperty throws TypeError if desc has 'set' and
+    'writable' present(8.10.5 step 9.a)
+---*/
+
+var o = {};
+
+// dummy getter
+var setter = function() {}
+var desc = {
+  set: setter,
+  writable: false
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-40-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-40-1.js
new file mode 100644
index 0000000000..3825e62f47
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-40-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-40-1
+description: >
+    Object.defineProperty - 'Attributes' is an RegExp object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+RegExp.prototype.enumerable = true;
+var regObj = new RegExp();
+
+Object.defineProperty(obj, "property", regObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-40.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-40.js
new file mode 100644
index 0000000000..3f2272f1e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-40.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-40
+description: >
+    Object.defineProperty - 'Attributes' is an RegExp object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var regObj = new RegExp();
+regObj.enumerable = true;
+
+Object.defineProperty(obj, "property", regObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-41-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-41-1.js
new file mode 100644
index 0000000000..92b5b52a77
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-41-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-41-1
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.prototype.enumerable = true;
+
+Object.defineProperty(obj, "property", JSON);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-41.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-41.js
new file mode 100644
index 0000000000..64b6bdc293
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-41.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-41
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+JSON.enumerable = true;
+
+Object.defineProperty(obj, "property", JSON);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-42-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-42-1.js
new file mode 100644
index 0000000000..14fe43adf5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-42-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-42-1
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'enumerable' property of
+    prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Error.prototype.enumerable = true;
+var errObj = new Error();
+
+Object.defineProperty(obj, "property", errObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-42.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-42.js
new file mode 100644
index 0000000000..f5781ac3e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-42.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-42
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var errObj = new Error();
+errObj.enumerable = true;
+
+Object.defineProperty(obj, "property", errObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-43-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-43-1.js
new file mode 100644
index 0000000000..6e64e8f305
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-43-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-43-1
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'enumerable'
+    property of prototype object (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.prototype.enumerable = true;
+var argObj = (function() {
+  return arguments;
+})();
+
+Object.defineProperty(obj, "property", argObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-43.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-43.js
new file mode 100644
index 0000000000..a9b9271c3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-43.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-43
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'enumerable'
+    property (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+var argObj = (function() {
+  return arguments;
+})();
+argObj.enumerable = true;
+
+Object.defineProperty(obj, "property", argObj);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-45.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-45.js
new file mode 100644
index 0000000000..ef414a936b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-45.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-45
+description: >
+    Object.defineProperty - 'Attributes' is the global object that
+    uses Object's [[Get]] method to access the 'enumerable' property
+    (8.10.5 step 3.a)
+---*/
+
+var obj = {};
+var accessed = false;
+
+this.enumerable = true;
+
+Object.defineProperty(obj, "property", this);
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-46.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-46.js
new file mode 100644
index 0000000000..60c0e62cbe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-46.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-46
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is undefined (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: undefined
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-47.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-47.js
new file mode 100644
index 0000000000..7c91011d9d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-47.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-47
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is null (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: null
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-48.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-48.js
new file mode 100644
index 0000000000..f35549a3a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-48.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-48
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is true (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: true
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-49.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-49.js
new file mode 100644
index 0000000000..0456d9e3d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-49.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-49
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is false (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: false
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-5.js
new file mode 100644
index 0000000000..33c8ea9c23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-5.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-5
+description: >
+    Object.defineProperty throws TypeError if getter is not callable
+    but not undefined (Number)(8.10.5 step 7.b)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = 42;
+var desc = {
+  get: getter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-50.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-50.js
new file mode 100644
index 0000000000..736d97a926
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-50.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-50
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is 0 (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: 0
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-51.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-51.js
new file mode 100644
index 0000000000..1c625e8fb6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-51.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-51
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is +0 (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: +0
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-52.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-52.js
new file mode 100644
index 0000000000..5ff4156232
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-52.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-52
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is -0 (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: -0
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-53.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-53.js
new file mode 100644
index 0000000000..e00a220d0a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-53.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-53
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is NaN (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: NaN
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-54.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-54.js
new file mode 100644
index 0000000000..088f3f85b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-54.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-54
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a positive number (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: 12
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-55.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-55.js
new file mode 100644
index 0000000000..4a34e236a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-55.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-55
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a negative number (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: -2
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-56.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-56.js
new file mode 100644
index 0000000000..a31c78e9df
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-56.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-56
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is an empty string (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: ""
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert.sameValue(accessed, false, 'accessed');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-57.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-57.js
new file mode 100644
index 0000000000..a23c65c9d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-57.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-57
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a non-empty string (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: "AB\n\\cd"
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-58.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-58.js
new file mode 100644
index 0000000000..e3cf96af5f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-58.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-58
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a Function object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: function() {}
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-59.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-59.js
new file mode 100644
index 0000000000..4fff4bae8f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-59.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-59
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is an Array object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: []
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-6.js
new file mode 100644
index 0000000000..dc5da2297a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-6.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-6
+description: >
+    Object.defineProperty throws TypeError if getter is not callable
+    but not undefined (Boolean)(8.10.5 step 7.b)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = true;
+var desc = {
+  get: getter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-60.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-60.js
new file mode 100644
index 0000000000..caf4c81fea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-60.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-60
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a String Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new String()
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-61.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-61.js
new file mode 100644
index 0000000000..182996fca8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-61.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-61
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a Boolean Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new Boolean()
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-62.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-62.js
new file mode 100644
index 0000000000..6c21bd9bff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-62.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-62
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a Number Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new Number()
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-63.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-63.js
new file mode 100644
index 0000000000..95c7bdf415
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-63.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-63
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is the Math Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: Math
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-64.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-64.js
new file mode 100644
index 0000000000..12fbea3f87
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-64.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-64
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a Date Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new Date()
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-65.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-65.js
new file mode 100644
index 0000000000..169cd7a1ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-65.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-65
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is a RegExp Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new RegExp()
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-66.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-66.js
new file mode 100644
index 0000000000..2da5cc0042
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-66.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-66
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is the JSON Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: JSON
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-67.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-67.js
new file mode 100644
index 0000000000..e544a3e756
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-67.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-67
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is an Error Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new Error()
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-68.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-68.js
new file mode 100644
index 0000000000..37721703e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-68.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-68
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is an Arguments Object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+var argObj = (function() {
+  return arguments;
+})(0, 1, 2);
+
+Object.defineProperty(obj, "property", {
+  enumerable: argObj
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-7.js
new file mode 100644
index 0000000000..22b52bdb59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-7.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-7
+description: >
+    Object.defineProperty throws TypeError if getter is not callable
+    but not undefined (String)(8.10.5 step 7.b)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = "abc";
+var desc = {
+  get: getter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-70.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-70.js
new file mode 100644
index 0000000000..f2f6860918
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-70.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-70
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is the global object (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: this
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-71.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-71.js
new file mode 100644
index 0000000000..26c910d1c8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-71.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-71
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is treated as true when it is a string (value is
+    'false') (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: "false"
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-72.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-72.js
new file mode 100644
index 0000000000..35004b426f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-72.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-72
+description: >
+    Object.defineProperty - value of 'enumerable' property in
+    'Attributes' is new Boolean(false) which is treated as true value
+    (8.10.5 step 3.b)
+---*/
+
+var obj = {};
+var accessed = false;
+
+Object.defineProperty(obj, "property", {
+  enumerable: new Boolean(false)
+});
+
+for (var prop in obj) {
+  if (prop === "property") {
+    accessed = true;
+  }
+}
+
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js
new file mode 100644
index 0000000000..965fa44537
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-73.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-73
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    present (8.10.5 step 4)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js
new file mode 100644
index 0000000000..443d61a4a7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-74.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-74
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    not present (8.10.5 step 4)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  value: 100
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-75.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-75.js
new file mode 100644
index 0000000000..30c5d53090
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-75.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-75
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own data property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: true
+});
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js
new file mode 100644
index 0000000000..076c86ede5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-76.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-76
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    an inherited data property (8.10.5 step 4.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var proto = {
+  configurable: false
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"));
+
+verifyNotConfigurable(obj, "property");
+
+assert(obj.hasOwnProperty("property"));
+
+assert.sameValue(typeof(obj.property), "undefined");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-77.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-77.js
new file mode 100644
index 0000000000..d5b38d7c0d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-77.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-77
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own data property that overrides an inherited data property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  configurable: false
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+child.configurable = true;
+
+Object.defineProperty(obj, "property", child);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-78.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-78.js
new file mode 100644
index 0000000000..d61327b686
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-78.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-78
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own data property that overrides an inherited accessor property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+
+Object.defineProperty(proto, "configurable", {
+  get: function() {
+    return false;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "configurable", {
+  value: true
+});
+
+Object.defineProperty(obj, "property", child);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-79.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-79.js
new file mode 100644
index 0000000000..962fd06375
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-79.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-79
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own accessor property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var attr = {};
+Object.defineProperty(attr, "configurable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", attr);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-8.js
new file mode 100644
index 0000000000..65baf21693
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-8.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-8
+description: >
+    Object.defineProperty throws TypeError if getter is not callable
+    but not undefined (Null)(8.10.5 step 7.b)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = null;
+var desc = {
+  get: getter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-80.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-80.js
new file mode 100644
index 0000000000..a15e67824a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-80.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-80
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    an inherited accessor property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "configurable", {
+  get: function() {
+    return true;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-81.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-81.js
new file mode 100644
index 0000000000..7ce29be186
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-81.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-81
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own accessor property that overrides an inherited data property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var proto = {
+  configurable: false
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "configurable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-82.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-82.js
new file mode 100644
index 0000000000..de771e073a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-82.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-82
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own accessor property that overrides an inherited accessor
+    property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "configurable", {
+  get: function() {
+    return false;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "configurable", {
+  get: function() {
+    return true;
+  }
+});
+
+Object.defineProperty(obj, "property", child);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js
new file mode 100644
index 0000000000..1ab0672165
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-83.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-83
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own accessor property without a get function (8.10.5 step 4.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var attr = {};
+Object.defineProperty(attr, "configurable", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", attr);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js
new file mode 100644
index 0000000000..2361aa0708
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-84.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-84
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    own accessor property(without a get function) that overrides an
+    inherited accessor property (8.10.5 step 4.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "configurable", {
+  get: function() {
+    return true;
+  }
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+Object.defineProperty(child, "configurable", {
+  set: function() {}
+});
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js
new file mode 100644
index 0000000000..0b0868625f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-85.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-85
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    an inherited accessor property without a get function (8.10.5 step
+    4.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var proto = {};
+Object.defineProperty(proto, "configurable", {
+  set: function() {}
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+
+Object.defineProperty(obj, "property", child);
+
+assert(obj.hasOwnProperty("property"));
+
+verifyNotConfigurable(obj, "property");
+
+assert(obj.hasOwnProperty("property"));
+assert.sameValue(typeof(obj.property), "undefined");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-86-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-86-1.js
new file mode 100644
index 0000000000..2024068458
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-86-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-86-1
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'configurable'
+    property of prototype object (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Function.prototype.configurable = true;
+var funObj = function(a, b) {
+  return a + b;
+};
+
+Object.defineProperty(obj, "property", funObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-86.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-86.js
new file mode 100644
index 0000000000..512a37fafa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-86.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-86
+description: >
+    Object.defineProperty - 'Attributes' is a Function object which
+    implements its own [[Get]] method to access the 'configurable'
+    property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var funObj = function(a, b) {
+  return a + b;
+};
+
+funObj.configurable = true;
+
+Object.defineProperty(obj, "property", funObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-87-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-87-1.js
new file mode 100644
index 0000000000..6bbf484f20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-87-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-87-1
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Array.prototype.configurable = true;
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(obj, "property", arrObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-87.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-87.js
new file mode 100644
index 0000000000..0462349a5d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-87.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-87
+description: >
+    Object.defineProperty - 'Attributes' is an Array object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var arrObj = [1, 2, 3];
+
+arrObj.configurable = true;
+
+Object.defineProperty(obj, "property", arrObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-88-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-88-1.js
new file mode 100644
index 0000000000..005a7544ed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-88-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-88-1
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+String.prototype.configurable = true;
+var strObj = new String("abc");
+
+Object.defineProperty(obj, "property", strObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-88.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-88.js
new file mode 100644
index 0000000000..cfef428e43
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-88.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-88
+description: >
+    Object.defineProperty - 'Attributes' is a String object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var strObj = new String("abc");
+
+strObj.configurable = true;
+
+Object.defineProperty(obj, "property", strObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-89-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-89-1.js
new file mode 100644
index 0000000000..a2e0e0af99
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-89-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-89-1
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Boolean.prototype.configurable = true;
+var boolObj = new Boolean(true);
+
+Object.defineProperty(obj, "property", boolObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-89.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-89.js
new file mode 100644
index 0000000000..44df1b6e3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-89.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-89
+description: >
+    Object.defineProperty - 'Attributes' is a Boolean object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var boolObj = new Boolean(true);
+
+boolObj.configurable = true;
+
+Object.defineProperty(obj, "property", boolObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-9.js
new file mode 100644
index 0000000000..5a9310275b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-9.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    The abtract operation ToPropertyDescriptor  is used to package the
+    into a property desc. Step 10 of ToPropertyDescriptor throws a TypeError
+    if the property desc ends up having a mix of accessor and data property elements.
+es5id: 15.2.3.6-3-9
+description: >
+    Object.defineProperty throws TypeError if getter is not callable
+    but not undefined (Object)(8.10.5 step 7.b)
+---*/
+
+var o = {};
+
+// dummy getter
+var getter = {
+  a: 1
+};
+var desc = {
+  get: getter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-90-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-90-1.js
new file mode 100644
index 0000000000..6079a53c82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-90-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-90-1
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Number.prototype.configurable = true;
+var numObj = new Number(-2);
+
+Object.defineProperty(obj, "property", numObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-90.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-90.js
new file mode 100644
index 0000000000..d684335835
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-90.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-90
+description: >
+    Object.defineProperty - 'Attributes' is a Number object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var numObj = new Number(-2);
+
+numObj.configurable = true;
+
+Object.defineProperty(obj, "property", numObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-91-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-91-1.js
new file mode 100644
index 0000000000..567248b150
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-91-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-91-1
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Object.prototype.configurable = true;
+
+Object.defineProperty(obj, "property", Math);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-91.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-91.js
new file mode 100644
index 0000000000..302774537c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-91.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-91
+description: >
+    Object.defineProperty - 'Attributes' is the Math object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Math.configurable = true;
+
+Object.defineProperty(obj, "property", Math);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-92-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-92-1.js
new file mode 100644
index 0000000000..7bb3580ce5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-92-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-92-1
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Date.prototype.configurable = true;
+var dateObj = new Date();
+
+Object.defineProperty(obj, "property", dateObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-92.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-92.js
new file mode 100644
index 0000000000..cd9bf29b9e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-92.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-92
+description: >
+    Object.defineProperty - 'Attributes' is a Date object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var dateObj = new Date();
+
+dateObj.configurable = true;
+
+Object.defineProperty(obj, "property", dateObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-93-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-93-1.js
new file mode 100644
index 0000000000..f5736ccaa5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-93-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-93-1
+description: >
+    Object.defineProperty - 'Attributes' is an RegExp object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+RegExp.prototype.configurable = true;
+var regObj = new RegExp();
+
+Object.defineProperty(obj, "property", regObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-93.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-93.js
new file mode 100644
index 0000000000..595a3b6857
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-93.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-93
+description: >
+    Object.defineProperty - 'Attributes' is an RegExp object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var regObj = new RegExp();
+
+regObj.configurable = true;
+
+Object.defineProperty(obj, "property", regObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-94-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-94-1.js
new file mode 100644
index 0000000000..d0b6c4dadf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-94-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-94-1
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Object.prototype.configurable = true;
+
+Object.defineProperty(obj, "property", JSON);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-94.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-94.js
new file mode 100644
index 0000000000..f5b58f85f3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-94.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-94
+description: >
+    Object.defineProperty - 'Attributes' is the JSON object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+JSON.configurable = true;
+
+Object.defineProperty(obj, "property", JSON);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-95-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-95-1.js
new file mode 100644
index 0000000000..2a06a28507
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-95-1.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-95-1
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Error.prototype.configurable = true;
+var errObj = new Error();
+
+Object.defineProperty(obj, "property", errObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-95.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-95.js
new file mode 100644
index 0000000000..b17895a478
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-95.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-95
+description: >
+    Object.defineProperty - 'Attributes' is an Error object that uses
+    Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var errObj = new Error();
+
+errObj.configurable = true;
+
+Object.defineProperty(obj, "property", errObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-96-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-96-1.js
new file mode 100644
index 0000000000..29f10ca5cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-96-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-96-1
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'configurable'
+    property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+Object.prototype.configurable = true;
+var argObj = (function() {
+  return arguments;
+})();
+
+Object.defineProperty(obj, "property", argObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-96.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-96.js
new file mode 100644
index 0000000000..8c54cf0175
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-96.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-96
+description: >
+    Object.defineProperty - 'Attributes' is an Arguments object which
+    implements its own [[Get]] method to access the 'configurable'
+    property (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+var argObj = (function() {
+  return arguments;
+})();
+argObj.configurable = true;
+
+Object.defineProperty(obj, "property", argObj);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-98.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-98.js
new file mode 100644
index 0000000000..5079bbd85b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-98.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-98
+description: >
+    Object.defineProperty - 'Attributes' is the global object that
+    uses Object's [[Get]] method to access the 'configurable' property
+    (8.10.5 step 4.a)
+---*/
+
+var obj = {};
+
+this.configurable = true;
+
+Object.defineProperty(obj, "property", this);
+
+var beforeDeleted = obj.hasOwnProperty("property");
+
+delete obj.property;
+
+var afterDeleted = obj.hasOwnProperty("property");
+
+assert.sameValue(beforeDeleted, true, 'beforeDeleted');
+assert.sameValue(afterDeleted, false, 'afterDeleted');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js
new file mode 100644
index 0000000000..aabe445bef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-3-99.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-3-99
+description: >
+    Object.defineProperty - 'configurable' property in 'Attributes' is
+    undefined (8.10.5 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  configurable: undefined
+});
+
+assert(obj.hasOwnProperty("property"));
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-1.js
new file mode 100644
index 0000000000..2ec7824d67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-1.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O passing 'true' for the Throw flag. In this case, step 3 of
+    [[DefineOwnProperty]] requires that it throw a TypeError exception when
+    current is undefined and extensible is false. The value of desc does not
+    matter.
+es5id: 15.2.3.6-4-1
+description: >
+    Object.defineProperty throws TypeError when adding properties to
+    non-extensible objects(8.12.9 step 3)
+---*/
+
+var o = {};
+Object.preventExtensions(o);
+assert.throws(TypeError, function() {
+  var desc = {
+    value: 1
+  };
+  Object.defineProperty(o, "foo", desc);
+});
+assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-10.js
new file mode 100644
index 0000000000..732b55062c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-10.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 7b of [[DefineOwnProperty]] rejects if
+    current.[[Enumerable]] and desc.[[Enumerable]] are the boolean negations
+    of each other.
+es5id: 15.2.3.6-4-10
+description: >
+    Object.defineProperty throws TypeError when changing
+    [[Enumerable]] from false to true on non-configurable accessor
+    properties
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter,
+  enumerable: false,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, setting enumerable to true should fail, since [[Configurable]]
+// on the original property will be false.
+var desc = {
+  get: getter,
+  enumerable: true
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js
new file mode 100644
index 0000000000..34c2f090cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-100.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-100
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    desc.value and name.value are two different values (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+obj.foo = 100; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: 200
+});
+verifyEqualTo(obj, "foo", 200);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js
new file mode 100644
index 0000000000..1da7826cf5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-101.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-101
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    name.value is present and desc.value is undefined (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+obj.foo = 100; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: undefined
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js
new file mode 100644
index 0000000000..33d84c9f53
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-102.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-102
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    desc.value is present and name.value is undefined (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+obj.foo = undefined; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: 100
+});
+verifyEqualTo(obj, "foo", 100);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js
new file mode 100644
index 0000000000..b98b2837f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-103.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-103
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    name.writable and desc.writable are different values (8.12.9 step
+    12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  writable: true
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js
new file mode 100644
index 0000000000..28de47218b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-104.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-104
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    name.enumerable and desc.enumerable are different values (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: true
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js
new file mode 100644
index 0000000000..d1c51afdd3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-105.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-105
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    name.configurable = true and desc.configurable = false (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 200,
+  enumerable: true,
+  writable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", 200);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js
new file mode 100644
index 0000000000..9d726fe9c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-106.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-106
+description: >
+    Object.defineProperty - 'name' and 'desc' are data properties,
+    several attributes values of name and desc are different (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  value: 200,
+  writable: false,
+  enumerable: false
+});
+verifyEqualTo(obj, "foo", 200);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js
new file mode 100644
index 0000000000..949c297366
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-107.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-107
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    both desc.[[Get]] and name.[[Get]] are two different values
+    (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc,
+  configurable: true
+});
+
+function getFunc2() {
+  return 20;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc2
+});
+verifyEqualTo(obj, "foo", getFunc2());
+
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js
new file mode 100644
index 0000000000..c9f5864973
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-108.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-108
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor
+    properties,  name.[[Get]] is present and desc.[[Get]] is undefined
+    (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc,
+  get: undefined
+});
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js
new file mode 100644
index 0000000000..8093ffd718
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-109.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-109
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    name.[[Get]] is undefined and desc.[[Get]] is function (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc,
+  get: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+function getFunc() {
+  return 10;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc
+});
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-11.js
new file mode 100644
index 0000000000..e1eb427683
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-11.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 7b of [[DefineOwnProperty]] rejects if
+    current.[[Enumerable]] and desc.[[Enumerable]] are the boolean negations
+    of each other.
+es5id: 15.2.3.6-4-11
+description: >
+    Object.defineProperty throws TypeError when changing
+    [[Enumerable]] from true to false on non-configurable accessor
+    properties
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter,
+  enumerable: true,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, setting enumerable to true should fail, since [[Configurable]]
+// on the original property will be false.
+var desc = {
+  get: getter,
+  enumerable: false
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.enumerable, true, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js
new file mode 100644
index 0000000000..c94fbc8af0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-110.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-110
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    both desc.[[Set]] and name.[[Set]] are two different values
+    (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function setFunc1() {
+  return 10;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc1,
+  enumerable: true,
+  configurable: true
+});
+
+function setFunc2(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc2
+});
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-111.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-111.js
new file mode 100644
index 0000000000..80b0489702
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-111.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-111
+description: >
+    Object.defineProperty  - 'name' and 'desc' are accessor
+    properties, name.[[Set]] is present and desc.[[Set]] is undefined
+    (8.12.9 step 12)
+---*/
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  set: undefined,
+  get: getFunc
+});
+
+
+var desc = Object.getOwnPropertyDescriptor(obj, "foo");
+
+assert(obj.hasOwnProperty("foo"), 'obj.hasOwnProperty("foo") !== true');
+assert.sameValue(typeof(desc.set), "undefined", 'typeof (desc.set)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js
new file mode 100644
index 0000000000..4a80f6b084
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-112.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-112
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    name.[[Set]] is undefined and desc.[[Set]] is function (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: undefined,
+  get: getFunc,
+  enumerable: true,
+  configurable: true
+});
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc
+});
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js
new file mode 100644
index 0000000000..48e4fa7f6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-113.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-113
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    name.enumerable and desc.enumerable are different values (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  enumerable: false
+});
+
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js
new file mode 100644
index 0000000000..a0a8bc367d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-114.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-114
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    name.configurable = true and desc.configurable = false (8.12.9
+    step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+function getFunc() {
+  return 10;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  configurable: false
+});
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js
new file mode 100644
index 0000000000..5481206420
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-115.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-115
+description: >
+    Object.defineProperty - 'name' and 'desc' are accessor properties,
+    several attributes values of 'name' and 'desc' are different
+    (8.12.9 step 12)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc1() {
+  return 10;
+}
+
+function setFunc1() {}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc1,
+  set: setFunc1,
+  enumerable: true,
+  configurable: true
+});
+
+function getFunc2() {
+  return 20;
+}
+
+function setFunc2(value) {
+  obj.setVerifyHelpProp = value;
+}
+Object.defineProperty(obj, "foo", {
+  get: getFunc2,
+  set: setFunc2,
+  enumerable: false
+});
+verifyEqualTo(obj, "foo", getFunc2());
+
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-116.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-116.js
new file mode 100644
index 0000000000..d3ef817243
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-116.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-116
+description: >
+    Object.defineProperty - 'O' is an Array, test the length property
+    of 'O' is own data property (15.4.5.1 step 1)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [0, 1];
+Object.defineProperty(arrObj, "1", {
+  value: 1,
+  configurable: false
+});
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+
+verifyProperty(arrObj, "length", {
+  value: 2,
+  writable: true,
+  configurable: false,
+  enumerable: false,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-117.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-117.js
new file mode 100644
index 0000000000..96989d3052
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-117.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-117
+description: >
+    Object.defineProperty - 'O' is an Array, test the length property
+    of 'O' is own data property that overrides an inherited data
+    property (15.4.5.1 step 1)
+---*/
+
+var arrObj = [0, 1, 2];
+var arrProtoLen;
+
+assert.throws(TypeError, function() {
+  arrProtoLen = Array.prototype.length;
+  Array.prototype.length = 0;
+
+
+  Object.defineProperty(arrObj, "2", {
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 3, 'arrObj.length');
+assert.sameValue(Array.prototype.length, 0, 'Array.prototype.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js
new file mode 100644
index 0000000000..47a6508761
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-118.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-118
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is absent, test
+    every field in 'desc' is absent (15.4.5.1 step 3.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {});
+
+assert.sameValue(arrObj.length, 0);
+arrObj.length = 2;
+assert.sameValue(arrObj.length, 2);
+verifyNotEnumerable(arrObj, "length");
+verifyNotConfigurable(arrObj, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js
new file mode 100644
index 0000000000..0c07b625e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-119.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-119
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is absent, test
+    every field in 'desc' is same with corresponding attribute value
+    of the length property in 'O' (15.4.5.1 step 3.a.i)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+Object.defineProperty(arrObj, "length", {
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+
+assert.sameValue(arrObj.length, 0);
+arrObj.length = 2;
+assert.sameValue(arrObj.length, 2);
+verifyNotEnumerable(arrObj, "length");
+verifyNotConfigurable(arrObj, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-12.js
new file mode 100644
index 0000000000..b823076eda
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-12.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 9a of
+    [[DefineOwnProperty]] rejects changing the kind of a property.
+es5id: 15.2.3.6-4-12
+description: >
+    Object.defineProperty throws TypeError when changing
+    non-configurable data properties to accessor properties
+---*/
+
+var o = {};
+
+// create a data valued property; all other attributes default to false.
+var d1 = {
+  value: 101,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// changing "foo" to be an accessor should fail, since [[Configurable]]
+// on the original property will be false.
+
+// dummy getter
+var getter = function() {
+  return 1;
+}
+
+var desc = {
+  get: getter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain a data valued property.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.writable, false, 'd2.writable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-120.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-120.js
new file mode 100644
index 0000000000..b346edeaa2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-120.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-120
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is absent, test
+    TypeError is thrown when updating the [[Configurable]] attribute
+    of the length property from false to true (15.4.5.1 step 3.a.i)
+---*/
+
+var arrObj = [];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-121.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-121.js
new file mode 100644
index 0000000000..89ecc7b1d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-121.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-121
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is absent, test
+    TypeError is thrown when updating the [[Enumerable]] attribute of
+    the length property from false to true (15.4.5.1 step 3.a.i)
+---*/
+
+var arrObj = [];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    enumerable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-122.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-122.js
new file mode 100644
index 0000000000..e8ee0f856f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-122.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-122
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test TypeError is thrown when 'desc' is accessor
+    descriptor (15.4.5.1 step 3.a.i)
+---*/
+
+var arrObj = [];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    get: function() {
+      return 2;
+    }
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-123.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-123.js
new file mode 100644
index 0000000000..019be751a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-123.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-123
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is absent, test
+    TypeError is thrown when updating the [[Writable]] attribute of
+    the length property from false to true (15.4.5.1 step 3.a.i)
+---*/
+
+var arrObj = [];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    writable: false
+  });
+  Object.defineProperty(arrObj, "length", {
+    writable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js
new file mode 100644
index 0000000000..1dce4ea87c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-124.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-124
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is absent, test
+    updating the [[Writable]] attribute of the length property from
+    true to false (15.4.5.1 step 3.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+verifyEqualTo(arrObj, "length", 0);
+
+verifyNotWritable(arrObj, "length");
+
+verifyNotEnumerable(arrObj, "length");
+
+verifyNotConfigurable(arrObj, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-125.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-125.js
new file mode 100644
index 0000000000..04afc2ed1a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-125.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-125
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test that RangeError exception is thrown when
+    [[Value]] field of 'desc' is undefined (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: undefined
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-126.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-126.js
new file mode 100644
index 0000000000..37e3e1fccd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-126.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-126
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is null
+    (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: null
+});
+
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-127.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-127.js
new file mode 100644
index 0000000000..5fe718c75d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-127.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-127
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is a boolean
+    with value false (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: false
+});
+
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+assert.sameValue(arrObj.hasOwnProperty("0"), false, 'arrObj.hasOwnProperty("0")');
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-128.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-128.js
new file mode 100644
index 0000000000..2a97e81a32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-128.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-128
+description: >
+    Object.defineProperty -  'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is a boolean
+    with value true (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: true
+});
+
+assert.sameValue(arrObj.length, 1, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-129.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-129.js
new file mode 100644
index 0000000000..d98863c616
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-129.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-129
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is not thrown when the
+    [[Value]] field of 'desc' is 0 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 0
+});
+
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-13.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-13.js
new file mode 100644
index 0000000000..8be4d52236
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-13.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 9a of
+    [[DefineOwnProperty]] rejects changing the kind of a property.
+es5id: 15.2.3.6-4-13
+description: >
+    Object.defineProperty throws TypeError when changing
+    non-configurable accessor properties to data properties
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// changing "foo" to be a data property should fail, since [[Configurable]]
+// on the original property will be false.
+var desc = {
+  value: 101
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain an accessor property.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-130.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-130.js
new file mode 100644
index 0000000000..7591d9c343
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-130.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-130
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is not thrown when the
+    [[Value]] field of 'desc' is +0 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: +0
+});
+
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-131.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-131.js
new file mode 100644
index 0000000000..7c81479205
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-131.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-131
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is not thrown when the
+    [[Value]] field of 'desc' is -0 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: -0
+});
+
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-132.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-132.js
new file mode 100644
index 0000000000..517fda892f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-132.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-132
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is not thrown when the
+    [[Value]] field of 'desc' is a positive number (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: 12
+});
+
+assert.sameValue(arrObj.length, 12, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-133.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-133.js
new file mode 100644
index 0000000000..047b6aaec3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-133.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-133
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is a negative number (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: -9
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-134.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-134.js
new file mode 100644
index 0000000000..c8a5ec719d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-134.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-134
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is +Infinity (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: +Infinity
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-135.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-135.js
new file mode 100644
index 0000000000..52130077e3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-135.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-135
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is -Infinity (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: -Infinity
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-136.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-136.js
new file mode 100644
index 0000000000..e025c7bca1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-136.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-136
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is NaN (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: NaN
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-137.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-137.js
new file mode 100644
index 0000000000..a0f59409bf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-137.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-137
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is not thrown when the
+    [[Value]] field of 'desc' is a string containing a positive number
+    (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: "2"
+});
+
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-138.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-138.js
new file mode 100644
index 0000000000..4f7df20288
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-138.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-138
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is a string containing a negative number
+    (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: "-42"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-139.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-139.js
new file mode 100644
index 0000000000..e3cbaca429
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-139.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-139
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is a string containing a decimal number
+    (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: "200.59"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-14.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-14.js
new file mode 100644
index 0000000000..f84d14edad
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-14.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For configurable properties, step 9b of
+    [[DefineOwnProperty]] permits changing the kind of a property.
+es5id: 15.2.3.6-4-14
+description: >
+    Object.defineProperty permits changing data property to accessor
+    property for configurable properties
+---*/
+
+var o = {};
+
+// create a data property. In this case,
+// [[Enumerable]] and [[Configurable]] are true
+o["foo"] = 101;
+
+// changing "foo" to be an accessor should succeed, since [[Configurable]]
+// on the original property will be true. Existing values of [[Configurable]]
+// and [[Enumerable]] need to be preserved and the rest need to be set to
+// their default values
+
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter
+};
+Object.defineProperty(o, "foo", d1);
+
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.enumerable, true, 'd2.enumerable');
+assert.sameValue(d2.configurable, true, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-140.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-140.js
new file mode 100644
index 0000000000..e17d87caaf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-140.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-140
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is a string containing +Infinity
+    (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: "+Infinity"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-141.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-141.js
new file mode 100644
index 0000000000..aad7e6a6a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-141.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-141
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is a string containing -Infinity
+    (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: "-Infinity"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-142.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-142.js
new file mode 100644
index 0000000000..de827ec701
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-142.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-142
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is a string
+    containing an exponential number (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: "2E3"
+});
+
+assert.sameValue(arrObj.length, 2E3, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-143.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-143.js
new file mode 100644
index 0000000000..289bfd819e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-143.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-143
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is a string
+    containing a hex number (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: "0x00B"
+});
+
+assert.sameValue(arrObj.length, 0x00B, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-144.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-144.js
new file mode 100644
index 0000000000..dcd4edafec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-144.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-144
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is a string
+    containing a number with leading zeros (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: "0002.0"
+});
+
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-145.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-145.js
new file mode 100644
index 0000000000..b20705a9bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-145.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-145
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError exception is thrown when the
+    [[Value]] field of 'desc' is a string which doesn't convert to a
+    number (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: "two"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-146.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-146.js
new file mode 100644
index 0000000000..0ace2a69e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-146.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-146
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is an object
+    which has an own toString method (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: {
+    toString: function() {
+      return '2';
+    }
+  }
+});
+
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-147.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-147.js
new file mode 100644
index 0000000000..6e7906bb72
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-147.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-147
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is an Object
+    which has an own valueOf method (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: {
+    valueOf: function() {
+      return 2;
+    }
+  }
+});
+
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-148.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-148.js
new file mode 100644
index 0000000000..6b52e81756
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-148.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-148
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is an Object
+    which has an own valueOf method that returns an object and
+    toString method that returns a string (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+Object.defineProperty(arrObj, "length", {
+  value: {
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    },
+
+    valueOf: function() {
+      valueOfAccessed = true;
+      return {};
+    }
+  }
+});
+
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-149.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-149.js
new file mode 100644
index 0000000000..9926f307f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-149.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-149
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is an Object
+    which has an own toString and valueOf method (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+Object.defineProperty(arrObj, "length", {
+  value: {
+    toString: function() {
+      toStringAccessed = true;
+      return '2';
+    },
+
+    valueOf: function() {
+      valueOfAccessed = true;
+      return 3;
+    }
+  }
+});
+
+assert.sameValue(arrObj.length, 3, 'arrObj.length');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-15.js
new file mode 100644
index 0000000000..a79cef36b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-15.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For configurable properties, step 9c of
+    [[DefineOwnProperty]] permits changing the kind of a property.
+es5id: 15.2.3.6-4-15
+description: >
+    Object.defineProperty permits changing accessor property to data
+    property for configurable properties
+---*/
+
+var o = {};
+
+// define an accessor property
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter,
+  configurable: true
+};
+Object.defineProperty(o, "foo", d1);
+
+// changing "foo" to be a data valued property should succeed, since
+// [[Configurable]] on the original property will be true. Existing
+// values of [[Configurable]] and [[Enumerable]] need to be preserved
+// and the rest need to be set to their default values.
+var desc = {
+  value: 101
+};
+Object.defineProperty(o, "foo", desc);
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.writable, false, 'd2.writable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+assert.sameValue(d2.configurable, true, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-150.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-150.js
new file mode 100644
index 0000000000..644d864cc3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-150.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-150
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test TypeError is thrown when the [[Value]] field
+    of 'desc' is an Object that both toString and valueOf wouldn't
+    return primitive value (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+var toStringAccessed = false;
+var valueOfAccessed = false;
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: {
+      toString: function() {
+        toStringAccessed = true;
+        return {};
+      },
+
+      valueOf: function() {
+        valueOfAccessed = true;
+        return {};
+      }
+    }
+  });
+});
+assert(toStringAccessed, 'toStringAccessed !== true');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-151.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-151.js
new file mode 100644
index 0000000000..fc0f440498
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-151.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-151
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', and the [[Value]] field of 'desc' is an Object
+    with an own toString method and an inherited valueOf method
+    (15.4.5.1 step 3.c), test that the inherited valueOf method is used
+---*/
+
+var arrObj = [];
+var toStringAccessed = false;
+var valueOfAccessed = false;
+
+var proto = {
+  valueOf: function() {
+    valueOfAccessed = true;
+    return 2;
+  }
+};
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+
+var child = new ConstructFun();
+child.toString = function() {
+  toStringAccessed = true;
+  return 3;
+};
+
+Object.defineProperty(arrObj, "length", {
+  value: child
+});
+
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert.sameValue(toStringAccessed, false, 'toStringAccessed');
+assert(valueOfAccessed, 'valueOfAccessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-152.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-152.js
new file mode 100644
index 0000000000..afe5f79092
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-152.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-152
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O',  test RangeError is thrown when the [[Value]]
+    field of 'desc' is a positive non-integer values (15.4.5.1 step
+    3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 123.5
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-153.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-153.js
new file mode 100644
index 0000000000..5482b5345a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-153.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-153
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O',  test RangeError is thrown when the [[Value]]
+    field of 'desc' is a negative non-integer values (15.4.5.1 step
+    3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: -4294967294.5
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-154.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-154.js
new file mode 100644
index 0000000000..35466aea65
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-154.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-154
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is boundary
+    value 2^32 - 2 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: 4294967294
+});
+
+assert.sameValue(arrObj.length, 4294967294, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-155.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-155.js
new file mode 100644
index 0000000000..4cc37d22d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-155.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-155
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test the [[Value]] field of 'desc' is boundary
+    value 2^32 - 1 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  value: 4294967295
+});
+
+assert.sameValue(arrObj.length, 4294967295, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-156.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-156.js
new file mode 100644
index 0000000000..2d9440ecd2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-156.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-156
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError is thrown when the [[Value]]
+    field of 'desc' is boundary value 2^32 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 4294967296
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-157.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-157.js
new file mode 100644
index 0000000000..fc1324bc48
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-157.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-157
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', test RangeError is thrown when the [[Value]]
+    field of 'desc' is boundary value 2^32 + 1 (15.4.5.1 step 3.c)
+---*/
+
+var arrObj = [];
+assert.throws(RangeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 4294967297
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-159.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-159.js
new file mode 100644
index 0000000000..7e61a82e42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-159.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-159
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', set the [[Value]] field of 'desc' to a value
+    greater than the existing value of length (15.4.5.1 step 3.f)
+---*/
+
+var arrObj = [0, , 2];
+
+Object.defineProperty(arrObj, "length", {
+  value: 5
+});
+
+assert.sameValue(arrObj.length, 5, 'arrObj.length');
+assert.sameValue(arrObj[0], 0, 'arrObj[0]');
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+assert.sameValue(arrObj[2], 2, 'arrObj[2]');
+assert.sameValue(arrObj.hasOwnProperty("4"), false, 'arrObj.hasOwnProperty("4")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-16.js
new file mode 100644
index 0000000000..a6bc962c84
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-16.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 10.a.i
+    of [[DefineOwnProperty]] rejects if relaxing the [[Writable]] attribute.
+es5id: 15.2.3.6-4-16
+description: >
+    Object.defineProperty throws TypeError when relaxing [[Writable]]
+    on non-configurable data properties
+---*/
+
+var o = {};
+
+// create a data valued property; all other attributes default to false.
+var d1 = {
+  value: 101
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, relaxing [[Writable]] on "foo" should fail, since both
+// [[Configurable]] and [[Writable]] on the original property will be false.
+var desc = {
+  value: 101,
+  writable: true
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.writable, false, 'd2.writable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-160.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-160.js
new file mode 100644
index 0000000000..6fd7dc5419
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-160.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-160
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', set the [[Value]] field of 'desc' to a value
+    equal to the existing value of length (15.4.5.1 step 3.f)
+---*/
+
+var arrObj = [0, , 2];
+
+Object.defineProperty(arrObj, "length", {
+  value: 3
+});
+
+assert.sameValue(arrObj.length, 3, 'arrObj.length');
+assert.sameValue(arrObj[0], 0, 'arrObj[0]');
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+assert.sameValue(arrObj[2], 2, 'arrObj[2]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-161.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-161.js
new file mode 100644
index 0000000000..7dbf220d08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-161.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-161
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', set the [[Value]] field of 'desc' to a value
+    lesser than the existing value of length and test that indexes
+    beyond the new length are deleted(15.4.5.1 step 3.f)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 1
+});
+
+assert.sameValue(arrObj.length, 1, 'arrObj.length');
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-162.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-162.js
new file mode 100644
index 0000000000..9f95f2a88c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-162.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-162
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is greater than
+    value of the length property, test TypeError is thrown when the
+    length property is not writable (15.4.5.1 step 3.f.i)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 12
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-163.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-163.js
new file mode 100644
index 0000000000..b11428d19a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-163.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-163
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' equals to value of
+    the length property, test no TypeError is thrown when the length
+    property is not writable (15.4.5.1 step 3.f.i)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+
+Object.defineProperty(arrObj, "length", {
+  value: 0
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-164.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-164.js
new file mode 100644
index 0000000000..39c4562f65
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-164.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-164
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test TypeError is thrown when the
+    [[Writable]] attribute of the length property is false (15.4.5.1
+    step 3.g)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 0
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-165.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-165.js
new file mode 100644
index 0000000000..ac1b8394c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-165.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-165
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property,  test the [[Writable]] attribute of the
+    length property is set to true after deleting properties with
+    large index named if the [[Writable]] field of 'desc' is absent
+    (15.4.5.1 step 3.h)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 1
+});
+
+var indexDeleted = !arrObj.hasOwnProperty("1");
+
+arrObj.length = 10;
+
+assert(indexDeleted, 'indexDeleted !== true');
+assert.sameValue(arrObj.length, 10, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-166.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-166.js
new file mode 100644
index 0000000000..7fcec19a4e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-166.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-166
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property,  test the [[Writable]] attribute of the
+    length property is set to true after deleting properties with
+    large index named if the [[Writable]] field of 'desc' is true
+    (15.4.5.1 step 3.h)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 1,
+  writable: true
+});
+
+var indexDeleted = !arrObj.hasOwnProperty("1");
+
+arrObj.length = 10;
+
+assert(indexDeleted, 'indexDeleted !== true');
+assert.sameValue(arrObj.length, 10, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js
new file mode 100644
index 0000000000..8c51484bd1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-167.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-167
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Writable]] attribute of the
+    length property is set to false after deleting properties with
+    large index named if the [[Writable]] field of 'desc' is false
+    (15.4.5.1 step 3.i.ii)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 1,
+  writable: false
+});
+
+assert(!arrObj.hasOwnProperty("1"))
+assert.sameValue(arrObj.length, 1);
+verifyNotWritable(arrObj, "length");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-168.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-168.js
new file mode 100644
index 0000000000..89f38d9721
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-168.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-168
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', whose writable attribute is being changed to
+    false and the [[Value]] field of 'desc' is less than value of  the
+    length property and also lesser than an index of the array which
+    is set to configurable:false, test that new length is set to a
+    value greater than the non-deletable index by 1, writable
+    attribute of length is set to false and TypeError exception is
+    thrown (15.4.5.1 step 3.i.iii)
+---*/
+
+var arrObj = [0, 1, 2];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "length", {
+    value: 0,
+    writable: false
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-169.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-169.js
new file mode 100644
index 0000000000..6c9cdc648b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-169.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-169
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property and also lesser than an index of the array
+    which is set to configurable: false, test that new length is set
+    to a value greater than the non-deletable index by 1, and
+    TypeError is thrown (15.4.5.1 step 3.l.i)
+---*/
+
+var arrObj = [0, 1, 2];
+
+Object.defineProperty(arrObj, "1", {
+  configurable: false
+});
+
+Object.defineProperty(arrObj, "2", {
+  configurable: true
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert.sameValue(arrObj.hasOwnProperty("2"), false, 'arrObj.hasOwnProperty("2")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-17.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-17.js
new file mode 100644
index 0000000000..28ba9fae71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-17.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 10.a.ii.1
+    of [[DefineOwnProperty]] rejects changing the value of non-writable properties.
+es5id: 15.2.3.6-4-17
+description: >
+    Object.defineProperty throws TypeError when changing value of
+    non-writable non-configurable data properties
+---*/
+
+var o = {};
+
+// create a data valued property; all other attributes default to false.
+var d1 = {
+  value: 101
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, trying to change the value of "foo" should fail, since both
+// [[Configurable]] and [[Writable]] on the original property will be false.
+var desc = {
+  value: 102
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.writable, false, 'd2.writable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-170.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-170.js
new file mode 100644
index 0000000000..0dbe772bdd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-170.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-170
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property and also lesser than an index of the array
+    which is set to configurable: false, test that new length is set
+    to a value greater than the non-deletable index by 1, writable
+    attribute of length is set to false and TypeError exception is
+    thrown (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(arrObj.hasOwnProperty("1"), 'arrObj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-171.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-171.js
new file mode 100644
index 0000000000..c6732ffecc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-171.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-171
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of an
+    inherited data property with large index named in 'O' can't stop
+    deleting index named properties (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+Array.prototype[1] = 2; // Not setting the [[Configurable]] attribute of property "1" to false here, since Array.prototype is a global object, and non-configurbale property can't revert to configurable
+Object.defineProperty(arrObj, "length", {
+  value: 1
+});
+
+assert.sameValue(arrObj.length, 1, 'arrObj.length');
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-172.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-172.js
new file mode 100644
index 0000000000..c26d21a80d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-172.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-172
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of
+    own data property with large index named in 'O' that overrides an
+    inherited data property can stop deleting index named properties
+    (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    configurable: false
+  });
+
+  Array.prototype[1] = 2;
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(arrObj.hasOwnProperty("1"), 'arrObj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-173.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-173.js
new file mode 100644
index 0000000000..4abc8e4730
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-173.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-173
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of
+    own data property with large index named in 'O' that overrides an
+    inherited accessor property can stop deleting index named
+    properties (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    configurable: false
+  });
+
+  Object.defineProperty(Array.prototype, "1", {
+    get: function() {
+      return 2;
+    },
+    configurable: true
+  });
+
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(arrObj.hasOwnProperty("1"), 'arrObj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-174.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-174.js
new file mode 100644
index 0000000000..168a30e73d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-174.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-174
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of
+    own accessor property with large index named in 'O' can stop
+    deleting index named properties (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    get: function() {
+      return 1;
+    },
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(arrObj.hasOwnProperty("1"), 'arrObj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-175.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-175.js
new file mode 100644
index 0000000000..2be4dea4f9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-175.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-175
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of an
+    inherited accessor property with large index named in 'O' can't
+    stop deleting index named properties (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(Array.prototype, "1", {
+  get: function() {
+    return 1;
+  },
+  configurable: true // Not setting the [[Configurable]] attribute of property "1" to false here, since Array.prototype is a global object, and non-configurbale property can't revert to configurable
+});
+
+Object.defineProperty(arrObj, "length", {
+  value: 1
+});
+
+assert.sameValue(arrObj.length, 1, 'arrObj.length');
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-176.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-176.js
new file mode 100644
index 0000000000..7463cbce32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-176.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-176
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of
+    own accessor property with large index named in 'O' that overrides
+    an inherited data property can stop deleting index named
+    properties (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    get: function() {
+      return 2;
+    },
+    configurable: false
+  });
+
+  Array.prototype[1] = 2;
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(arrObj.hasOwnProperty("1"), 'arrObj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-177.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-177.js
new file mode 100644
index 0000000000..60bbee3532
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-177.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-177
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Configurable]] attribute of
+    own accessor property with large index named in 'O' that overrides
+    an inherited accessor property can stop deleting index named
+    properties (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "1", {
+    get: function() {
+      return 1;
+    },
+    configurable: false
+  });
+
+  Object.defineProperty(Array.prototype, "1", {
+    get: function() {
+      return 2;
+    },
+    configurable: true
+  });
+
+  Object.defineProperty(arrObj, "length", {
+    value: 1
+  });
+});
+assert.sameValue(arrObj.length, 2, 'arrObj.length');
+assert(arrObj.hasOwnProperty("1"), 'arrObj.hasOwnProperty("1") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-178.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-178.js
new file mode 100644
index 0000000000..690b57fe2a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-178.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-178
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the configurable large index named
+    property of 'O' is deleted (15.4.5.1 step 3.l.ii)
+---*/
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 1
+});
+
+assert.sameValue(arrObj.hasOwnProperty("1"), false, 'arrObj.hasOwnProperty("1")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-179-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-179-1.js
new file mode 100644
index 0000000000..5b6a6d6da9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-179-1.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-179-1
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is greater than
+    value of  the length property, test value of the length property
+    is same as [[Value]] (15.4.5.1 step 3.l.iii.1)
+---*/
+
+var arrObj = [0, 1, 2, 3];
+
+Object.defineProperty(arrObj, "1", {
+  configurable: false
+});
+
+Object.defineProperty(arrObj, "length", {
+  value: 3
+});
+
+assert.sameValue(arrObj.length, 3, 'arrObj.length');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js
new file mode 100644
index 0000000000..bf8a2dc3ca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-18.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 11.a.i
+    of [[DefineOwnProperty]] rejects changing the setter if present.
+es5id: 15.2.3.6-4-18
+description: >
+    Object.defineProperty throws TypeError when changing setter of
+    non-configurable accessor properties(8.12.9 step 11.a.i)
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, trying to change the setter should fail, since [[Configurable]]
+// on the original property will be false.
+var setter = function(x) {};
+var desc = {
+  set: setter
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js
new file mode 100644
index 0000000000..26f0e3e3cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-181.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-181
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is the length
+    property of 'O', the [[Value]] field of 'desc' is less than value
+    of  the length property, test the [[Writable]] attribute of the
+    length property is set to false at last when the [[Writable]]
+    field of 'desc' is false and 'O' doesn't contain non-configurable
+    large index named property (15.4.5.1 step 3.m)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [0, 1];
+
+Object.defineProperty(arrObj, "length", {
+  value: 0,
+  writable: false
+});
+
+verifyNotWritable(arrObj, "length");
+
+assert(!arrObj.hasOwnProperty("1"));
+assert.sameValue(arrObj.length, 0);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-182.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-182.js
new file mode 100644
index 0000000000..bd662904ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-182.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-182
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is available String values that convert to
+    numbers (15.4.5.1 step 4.a)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: 12
+});
+
+assert.sameValue(arrObj[0], 12, 'arrObj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-183.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-183.js
new file mode 100644
index 0000000000..0548d23453
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-183.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-183
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is boundary value 2^32 - 2 (15.4.5.1 step
+    4.a)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 4294967294, {
+  value: 100
+});
+
+assert(arrObj.hasOwnProperty("4294967294"), 'arrObj.hasOwnProperty("4294967294") !== true');
+assert.sameValue(arrObj.length, 4294967295, 'arrObj.length');
+assert.sameValue(arrObj[4294967294], 100, 'arrObj[4294967294]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-184.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-184.js
new file mode 100644
index 0000000000..d9ac8f433a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-184.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-184
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is boundary value 2^32 - 1 (15.4.5.1 step
+    4.a)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 4294967295, {
+  value: 100
+});
+
+assert(arrObj.hasOwnProperty("4294967295"), 'arrObj.hasOwnProperty("4294967295") !== true');
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+assert.sameValue(arrObj[4294967295], 100, 'arrObj[4294967295]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-185.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-185.js
new file mode 100644
index 0000000000..135d52b2d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-185.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-185
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is boundary value 2^32 (15.4.5.1 step 4.a)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 4294967296, {
+  value: 100
+});
+
+assert(arrObj.hasOwnProperty("4294967296"), 'arrObj.hasOwnProperty("4294967296") !== true');
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+assert.sameValue(arrObj[4294967296], 100, 'arrObj[4294967296]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-186.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-186.js
new file mode 100644
index 0000000000..24e3880dcc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-186.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-186
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is boundary value 2^32 + 1 (15.4.5.1 step
+    4.a)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 4294967297, {
+  value: 100
+});
+
+assert(arrObj.hasOwnProperty("4294967297"), 'arrObj.hasOwnProperty("4294967297") !== true');
+assert.sameValue(arrObj.length, 0, 'arrObj.length');
+assert.sameValue(arrObj[4294967297], 100, 'arrObj[4294967297]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-187.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-187.js
new file mode 100644
index 0000000000..253d472e4a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-187.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-187
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, test TypeError is not thrown if the [[Writable]]
+    attribute of the length property in 'O' is false and value of
+    'name' is less than value of the length property (15.4.5.1 step
+    4.b)
+---*/
+
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+
+Object.defineProperty(arrObj, 1, {
+  value: "abc"
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-188.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-188.js
new file mode 100644
index 0000000000..ff82432f6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-188.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-188
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, test TypeError is thrown if the [[Writable]]
+    attribute of the length property in 'O' is false and value of
+    'name' equals to value of the length property (15.4.5.1 step 4.b)
+---*/
+
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, 3, {
+    value: "abc"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-189.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-189.js
new file mode 100644
index 0000000000..566916b271
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-189.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-189
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, test TypeError is thrown if the [[Writable]]
+    attribute of the length property in 'O' is false and value of
+    'name' is greater than value of the length property (15.4.5.1 step
+    4.b)
+---*/
+
+var arrObj = [1, 2, 3];
+
+Object.defineProperty(arrObj, "length", {
+  writable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, 4, {
+    value: "abc"
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-19.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-19.js
new file mode 100644
index 0000000000..276d8dc60c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-19.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 11.a.i
+    of [[DefineOwnProperty]] permits setting a setter (if absent).
+es5id: 15.2.3.6-4-19
+description: >
+    Object.defineProperty permits setting a setter (if absent) of
+    non-configurable accessor properties(8.12.9 step 10.a.ii.1)
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+// dummy getter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, trying to set the setter should succeed even though [[Configurable]]
+// on the original property will be false.
+var desc = {
+  set: undefined
+};
+Object.defineProperty(o, "foo", desc);
+
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.set, undefined, 'd2.set');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js
new file mode 100644
index 0000000000..e9f7f17e6a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-190.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-190
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is own data property, test TypeError is
+    thrown on updating the configurable attribute from false to true
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 0, {
+  value: "ownDataProperty",
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, 0, {
+    configurable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", "ownDataProperty");
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-191.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-191.js
new file mode 100644
index 0000000000..c2c3f7b45f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-191.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-191
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is an inherited data property, test that
+    defining own index named property is successful (15.4.5.1 step 4.c)
+---*/
+
+try {
+  Object.defineProperty(Array.prototype, "0", {
+    value: 11,
+    configurable: true
+  });
+
+  var arrObj = [];
+
+  Object.defineProperty(arrObj, "0", {
+    configurable: false
+  });
+
+  if (!arrObj.hasOwnProperty("0")) {
+    throw new Test262Error("Expected arrObj.hasOwnProperty('0') === true, actually " + arrObj.hasOwnProperty("0"));
+  }
+  if (Array.prototype[0] !== 11) {
+    throw new Test262Error("Expected Array.prototype[0] === 11), actually " + Array.prototype[0]);
+  }
+  if (typeof arrObj[0] !== "undefined") {
+    throw new Test262Error("Expected typeof arrObj[0] === 'undefined'), actually " + typeof arrObj[0]);
+  }
+
+} finally {
+  delete Array.prototype[0];
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-192.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-192.js
new file mode 100644
index 0000000000..3914db9592
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-192.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-192
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is own data property that overrides an
+    inherited data property, test TypeError is thrown on updating the
+    [[Configurable]] attribute from false to true (15.4.5.1 step 4.c)
+---*/
+
+var arrObj = [];
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(Array.prototype, "0", {
+    value: 11,
+    configurable: true
+  });
+
+  Object.defineProperty(arrObj, "0", {
+    value: 12,
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "0", {
+    configurable: true
+  });
+});
+assert.sameValue(Array.prototype[0], 11, 'Array.prototype[0]');
+assert.sameValue(arrObj[0], 12, 'arrObj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-193.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-193.js
new file mode 100644
index 0000000000..d9c51ebd90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-193.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-193
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is own data property that overrides an
+    inherited accessor property, test TypeError is thrown when update
+    the [[Configurable]] attribute to true and value of
+    [[Configurable]] attribute of original is false  (15.4.5.1 step
+    4.c)
+---*/
+
+var arrObj = [];
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(Array.prototype, "0", {
+    get: function() {
+      return 11;
+    },
+    configurable: true
+  });
+
+  Object.defineProperty(arrObj, "0", {
+    value: 12,
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "0", {
+    configurable: true
+  });
+});
+assert.sameValue(Array.prototype[0], 11, 'Array.prototype[0]');
+assert.sameValue(arrObj[0], 12, 'arrObj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js
new file mode 100644
index 0000000000..c69f78bdbc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-194.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-194
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is own accessor property, test TypeError is
+    thrown on updating the configurable attribute from false to true
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+var getFunc = function() {
+  return 11;
+};
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    configurable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", getFunc());
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e.name);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js
new file mode 100644
index 0000000000..56e50846b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-195.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-195
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is an inherited accessor property (15.4.5.1
+    step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+function getFunc() {
+  return arrObj.helpVerifySet;
+}
+
+function setFunc(value) {
+  arrObj.helpVerifySet = value;
+}
+
+try {
+  Object.defineProperty(Array.prototype, "0", {
+    get: function() {
+      return 11;
+    },
+    configurable: true
+  });
+
+  var arrObj = [];
+
+
+  Object.defineProperty(arrObj, "0", {
+    get: getFunc,
+    set: setFunc,
+    configurable: false
+  });
+
+  arrObj[0] = 13;
+
+  verifyEqualTo(arrObj, "0", getFunc());
+
+  verifyWritable(arrObj, "0", "helpVerifySet");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+} finally {
+  delete Array.prototype[0];
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-196.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-196.js
new file mode 100644
index 0000000000..2c494aae84
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-196.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-196
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is own accessor property that overrides an
+    inherited data property (15.4.5.1 step 4.c)
+---*/
+
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(Array.prototype, "0", {
+    value: 11,
+    configurable: true
+  });
+
+  var arrObj = [];
+  Object.defineProperty(arrObj, "0", {
+    get: function() {},
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "0", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-197.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-197.js
new file mode 100644
index 0000000000..c9e2feaf5a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-197.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-197
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is own accessor property that overrides an
+    inherited accessor property (15.4.5.1 step 4.c)
+---*/
+
+
+assert.throws(TypeError, function() {
+  Object.defineProperty(Array.prototype, "0", {
+    get: function() {},
+    configurable: true
+  });
+
+  var arrObj = [];
+  Object.defineProperty(arrObj, "0", {
+    get: function() {},
+    configurable: false
+  });
+
+  Object.defineProperty(arrObj, "0", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-198.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-198.js
new file mode 100644
index 0000000000..526ebadfdf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-198.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-198
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O', test
+    TypeError is thrown when 'O' is not extensible (15.4.5.1 step 4.c)
+---*/
+
+var arrObj = [];
+Object.preventExtensions(arrObj);
+assert.throws(TypeError, function() {
+  var desc = {
+    value: 1
+  };
+  Object.defineProperty(arrObj, "0", desc);
+});
+assert.sameValue(arrObj.hasOwnProperty("0"), false, 'arrObj.hasOwnProperty("0")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js
new file mode 100644
index 0000000000..98cefd1ded
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-199.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-199
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O', test 'name'
+    is defined as data property when 'desc' is generic descriptor
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: true
+});
+
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-2.js
new file mode 100644
index 0000000000..115e9bdda5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-2.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For newly defined data properties, attributes
+    missing from desc should have values set to the defaults from 8.6.1.
+es5id: 15.2.3.6-4-2
+description: >
+    Object.defineProperty sets missing attributes to their default
+    values (data properties)(8.12.9 step 4.a.i)
+---*/
+
+var o = {};
+
+var desc = {
+  value: 1
+};
+Object.defineProperty(o, "foo", desc);
+
+var propDesc = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(propDesc.value, 1, 'propDesc.value'); // this is the value that was set
+assert.sameValue(propDesc.writable, false, 'propDesc.writable'); // false by default
+assert.sameValue(propDesc.enumerable, false, 'propDesc.enumerable'); // false by default
+assert.sameValue(propDesc.configurable, false, 'propDesc.configurable'); // false by default
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-20.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-20.js
new file mode 100644
index 0000000000..7814434368
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-20.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 11.a.ii
+    of [[DefineOwnProperty]] rejects changing the getter if present.
+es5id: 15.2.3.6-4-20
+description: >
+    Object.defineProperty throws TypeError when changing getter (if
+    present) of non-configurable accessor properties(8.12.9 step
+    11.a.ii)
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+// dummy getter/setter
+var getter = function() {
+  return 1;
+}
+var d1 = {
+  get: getter,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, trying to change the setter should fail, since [[Configurable]]
+// on the original property will be false.
+var desc = {
+  get: undefined
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js
new file mode 100644
index 0000000000..2c0632c716
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-200.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-200
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O', test
+    [[Value]] of 'name' property of 'Attributes' is set as undefined
+    if [[Value]] is absent in data descriptor 'desc' (15.4.5.1 step
+    4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js
new file mode 100644
index 0000000000..ab771a71c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-201.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-201
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O' and
+    [[Writable]] is absent in data descriptor 'desc', test
+    [[Writable]] attribute of  property 'name' is set to false
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: 1001,
+  enumerable: true,
+  configurable: false
+});
+verifyEqualTo(arrObj, "0", 1001);
+
+verifyNotWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js
new file mode 100644
index 0000000000..f6fe819199
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-202.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-202
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O' and
+    [[Enumerable]] is absent in data descriptor 'desc', test
+    [[Enumerable]] of property 'name' is set to false (15.4.5.1 step
+    4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: 1001,
+  writable: true,
+  configurable: true
+});
+verifyEqualTo(arrObj, "0", 1001);
+
+verifyWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js
new file mode 100644
index 0000000000..9e6cad35fb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-203.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-203
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O' and
+    [[Configurable]] is absent in data descriptor 'desc', test
+    [[Configurable]] of property 'name' is set to false (15.4.5.1 step
+    4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true
+});
+verifyEqualTo(arrObj, "0", 1001);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js
new file mode 100644
index 0000000000..b513a1dbb9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-204.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-204
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'desc' is data descriptor, test updating all
+    attribute values of 'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [1]; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(arrObj, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(arrObj, "0", 1001);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js
new file mode 100644
index 0000000000..72e179ef74
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-205.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-205
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O' and [[Get]]
+    is absent in accessor descriptor 'desc', test [[Get]] attribute of
+    property 'name' is set to undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+var setFunc = function(value) {
+  arrObj.setVerifyHelpProp = value;
+};
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-206.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-206.js
new file mode 100644
index 0000000000..124b0f9a43
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-206.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-206
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O', test [[Set]]
+    of 'name' property in 'Attributes' is set as undefined if [[Set]]
+    is absent in accessor descriptor 'desc' (15.4.5.1 step 4.c)
+---*/
+
+var arrObj = [];
+var getFunc = function() {};
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var desc = Object.getOwnPropertyDescriptor(arrObj, "0");
+
+assert(arrObj.hasOwnProperty("0"), 'arrObj.hasOwnProperty("0") !== true');
+assert(desc.hasOwnProperty("set"), 'desc.hasOwnProperty("set") !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js
new file mode 100644
index 0000000000..966b1744bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-207.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-207
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O' and
+    [[Enumerable]] is absent in accessor descriptor 'desc', test
+    [[Enumerable]] attribute of property 'name' is set to false
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+var setFunc = function(value) {
+  arrObj.setVerifyHelpProp = value;
+};
+var getFunc = function() {};
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc,
+  get: getFunc,
+  configurable: true
+});
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js
new file mode 100644
index 0000000000..ba15c84b8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-208.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-208
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' property doesn't exist in 'O' and
+    [[Configurable]] is absent in accessor descriptor 'desc', test
+    [[Configurable]] attribute of property 'name' is set to false
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+var setFunc = function(value) {
+  arrObj.setVerifyHelpProp = value;
+};
+var getFunc = function() {};
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc,
+  get: getFunc,
+  enumerable: true
+});
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js
new file mode 100644
index 0000000000..cdefdc539e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-209.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-209
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'desc' is accessor descriptor, test updating all
+    attribute values of 'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+var setFunc = function(value) {
+  arrObj.setVerifyHelpProp = value;
+};
+var getFunc = function() {
+  return 14;
+};
+
+Object.defineProperty(arrObj, "0", {
+  get: function() {
+    return 11;
+  },
+  set: function() {},
+  configurable: true,
+  enumerable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false,
+  enumerable: false
+});
+
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-21.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-21.js
new file mode 100644
index 0000000000..1ffe487dd7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-21.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For non-configurable properties, step 11.a.ii
+    of [[DefineOwnProperty]] permits setting a getter if absent.
+es5id: 15.2.3.6-4-21
+description: >
+    Object.defineProperty permits setting a getter (if absent) of
+    non-configurable accessor properties(8.12.9 step 11.a.ii)
+---*/
+
+var o = {};
+
+// create an accessor property; all other attributes default to false.
+// dummy setter
+var setter = function(x) {}
+var d1 = {
+  set: setter
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, trying to set the getter should succeed even though [[Configurable]]
+// on the original property will be false. Existing values of need to be preserved.
+var getter = undefined;
+var desc = {
+  get: getter
+};
+
+Object.defineProperty(o, "foo", desc);
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(d2.get, getter, 'd2.get');
+assert.sameValue(d2.set, setter, 'd2.set');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js
new file mode 100644
index 0000000000..3d5614db18
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-210.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-210
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' makes no change if every field in 'desc' is
+    absent (name is data property) (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+arrObj[0] = 101; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(arrObj, "0", {});
+verifyEqualTo(arrObj, "0", 101);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js
new file mode 100644
index 0000000000..74773a8b8c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-211.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-211
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' makes no change if every field in 'desc' is
+    absent(name is accessor property) (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function getFunc() {
+  return 11;
+}
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {});
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js
new file mode 100644
index 0000000000..60a73af96b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-212.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-212
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' makes no change if the value of every field
+    in 'desc' is the same value as the corresponding field in
+    'name'(desc is data property) (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+arrObj[0] = 100; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(arrObj, "0", {
+  value: 100,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+verifyEqualTo(arrObj, "0", 100);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js
new file mode 100644
index 0000000000..aba7e1fb85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-213.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-213
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' makes no change if the value of every field
+    in 'desc' is the same value as the corresponding field in
+    'name'(desc is accessor property) (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+var getFunc = function() {
+  return "100";
+};
+var setFunc = function(value) {
+  arrObj.setVerifyHelpProp = value;
+};
+
+var desc = {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+};
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", desc);
+
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js
new file mode 100644
index 0000000000..a68119a095
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-214.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-214
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property and its configurable and writable attributes are set to
+    false, test TypeError is thrown when the type of the [[Value]]
+    field of 'desc' is different from the type of the [[Value]]
+    attribute value of 'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 0, {
+  value: 101,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: "abc"
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", 101);
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js
new file mode 100644
index 0000000000..f6fccd3a61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-215.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-215
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, both the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: undefined
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: undefined
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js
new file mode 100644
index 0000000000..ac7099d2bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-216.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-216
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, both the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are null  (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: null
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: null
+});
+verifyEqualTo(arrObj, "0", null);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js
new file mode 100644
index 0000000000..3b9df95a20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-217.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-217
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, both the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are NaN  (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: NaN
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: NaN
+});
+
+assert(arrObj.hasOwnProperty("0"));
+assert(arrObj[0] !== arrObj[0]);
+
+verifyNotWritable(arrObj, "0");
+verifyNotEnumerable(arrObj, "0");
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js
new file mode 100644
index 0000000000..f9e2e8c567
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-218.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-218
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, test TypeError is thrown when the [[Value]] field of
+    'desc' is +0, and the [[Value]] attribute value of 'name' is -0
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: -0
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: +0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", -0);
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js
new file mode 100644
index 0000000000..627a70f3ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-219.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-219
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, test TypeError is thrown when the [[Value]] field of
+    'desc' is -0, and the [[Value]] attribute value of 'name' is +0
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: +0
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: -0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", +0);
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-22.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-22.js
new file mode 100644
index 0000000000..b43c7308e4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-22.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-22
+description: >
+    Object.defineProperty - 'name' is existing own data property
+    (8.12.9 step 1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "foo", {
+  value: 11,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    value: 12,
+    configurable: true
+  });
+});
+assert.sameValue(obj.foo, 11, 'obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js
new file mode 100644
index 0000000000..1e3d4a2d4c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-220.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-220
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are two numbers with same vaule
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: 101
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: 101
+});
+verifyEqualTo(arrObj, "0", 101);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js
new file mode 100644
index 0000000000..00732ff7be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-221.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-221
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, test TypeError is thrown  when the [[Value]] field of
+    'desc' and the [[Value]] attribute value of 'name' are two numbers
+    with different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 0, {
+  value: 101,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: 123
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", 101);
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js
new file mode 100644
index 0000000000..88d73c0af9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-222.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-222
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are two strings which have same length
+    and same characters in corresponding positions (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: "abcd"
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: "abcd"
+});
+verifyEqualTo(arrObj, "0", "abcd");
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js
new file mode 100644
index 0000000000..7177f6a39a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-223.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-223
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, test TypeError is thrown  when the [[Value]] field of
+    'desc' and the [[Value]] attribute value of 'name' are two strings
+    with different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 0, {
+  value: "abcd",
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: "fghj"
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", "abcd");
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js
new file mode 100644
index 0000000000..91cac8ffdc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-224.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-224
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are two booleans with same value
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  value: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: true
+});
+verifyEqualTo(arrObj, "0", true);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js
new file mode 100644
index 0000000000..28d8f74f8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-225.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-225
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, test TypeError is thrown when the [[Value]] field of
+    'desc' and the [[Value]] attribute value of 'name' are two
+    booleans with different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, 0, {
+  value: true,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: false
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", true);
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js
new file mode 100644
index 0000000000..d766b26449
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-226.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-226
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Value]] field of 'desc' and the [[Value]]
+    attribute value of 'name' are two objects which refer to the same
+    object (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+var obj1 = {
+  length: 10
+};
+
+Object.defineProperty(arrObj, "0", {
+  value: obj1
+});
+
+Object.defineProperty(arrObj, "0", {
+  value: obj1
+});
+verifyEqualTo(arrObj, "0", obj1);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js
new file mode 100644
index 0000000000..1834373563
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-227.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-227
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, test TypeError is thrown when the [[Value]] field of
+    'desc' and the [[Value]] attribute value of 'name' are two objects
+    which refer to two different objects (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+var obj1 = {
+  length: 10
+};
+Object.defineProperty(arrObj, 0, {
+  value: obj1,
+  writable: false,
+  configurable: false
+});
+
+var obj2 = {
+  length: 20
+};
+
+try {
+  Object.defineProperty(arrObj, "0", {
+    value: obj2
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "0", obj1);
+
+  verifyNotWritable(arrObj, "0");
+
+  verifyNotEnumerable(arrObj, "0");
+
+  verifyNotConfigurable(arrObj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js
new file mode 100644
index 0000000000..9316e59db2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-228.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-228
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Writable]] field of 'desc' and the [[Writable]]
+    attribute value of 'name' are two booleans with same value
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  writable: false
+});
+
+Object.defineProperty(arrObj, "0", {
+  writable: false
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js
new file mode 100644
index 0000000000..e1dead5a60
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-229.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-229
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Writable]] field of 'desc' and the [[Writable]]
+    attribute value of 'name' are two booleans with different values
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  writable: true
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-23.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-23.js
new file mode 100644
index 0000000000..c4d0277445
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-23.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-23
+description: >
+    Object.defineProperty - 'name' is existing an inherited data
+    property (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  value: 11,
+  configurable: false
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+
+Object.defineProperty(obj, "foo", {
+  configurable: true
+});
+
+assert(obj.hasOwnProperty("foo"), 'obj.hasOwnProperty("foo") !== true');
+assert.sameValue(typeof obj.foo, "undefined", 'typeof obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js
new file mode 100644
index 0000000000..61d0187d81
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-230.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-230
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Get]] field of 'desc' and the [[Get]] attribute
+    value of 'name' are two objects which refer to the same object
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+arrObj.helpVerifySet = 10;
+
+function getFunc() {
+  return arrObj.helpVerifySet;
+}
+
+function setFunc(value) {
+  arrObj.helpVerifySet = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  set: setFunc
+});
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc
+});
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyWritable(arrObj, "0", "helpVerifySet");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js
new file mode 100644
index 0000000000..40199bd209
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-231.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-231
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Get]] field of 'desc' and the [[Get]] attribute
+    value of 'name' are two objects which refer to the different
+    objects (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+arrObj.helpVerifySet = 10;
+
+function getFunc1() {
+  return 20;
+}
+
+function getFunc2() {
+  return arrObj.helpVerifySet;
+}
+
+function setFunc(value) {
+  arrObj.helpVerifySet = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc1,
+  set: setFunc,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc2
+});
+
+verifyEqualTo(arrObj, "0", getFunc2());
+
+verifyWritable(arrObj, "0", "helpVerifySet");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js
new file mode 100644
index 0000000000..d22adbe6f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-232.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-232
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Set]] field of 'desc' and the [[Set]] attribute
+    value of 'name' are two objects which refer to the same object
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc
+});
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc
+});
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js
new file mode 100644
index 0000000000..bd2f68977e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-233.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-233
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Set]] field of 'desc' and the [[Set]] attribute
+    value of 'name' are two objects which refer to the different
+    objects (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function setFunc1() {}
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc1,
+  configurable: true
+});
+
+function setFunc2(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc2
+});
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js
new file mode 100644
index 0000000000..b67690ecd5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-234.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-234
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Enumerable]] field of 'desc' and the
+    [[Enumerable]] attribute value of 'name' are two booleans with
+    same value (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: false
+});
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: false
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js
new file mode 100644
index 0000000000..d10baaf8d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-235.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-235
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Enumerable]] field of 'desc' and the
+    [[Enumerable]] attribute value of 'name' are two booleans with
+    different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: true
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js
new file mode 100644
index 0000000000..b7df65b72a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-236.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-236
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Configurable]] field of 'desc' and the
+    [[Configurable]] attribute value of 'name' are two booleans with
+    same value  (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  configurable: false
+});
+
+Object.defineProperty(arrObj, "0", {
+  configurable: false
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js
new file mode 100644
index 0000000000..59d2e8c84e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-237.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-237
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    property, the [[Configurable]] field of 'desc' and the
+    [[Configurable]] attribute value of 'name' are two booleans with
+    different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  configurable: false
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js
new file mode 100644
index 0000000000..9708bd0766
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-238.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-238
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, TypeError is thrown if the [[Configurable]]
+    attribute value of 'name' is false  and the [[Configurable]] field
+    of 'desc' is true (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: 3,
+  writable: true,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: 13,
+    writable: true,
+    configurable: true
+  });
+  throw new Test262Error("Expected an exception.");
+
+} catch (e) {
+  verifyEqualTo(arrObj, "1", 3);
+
+  verifyWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js
new file mode 100644
index 0000000000..16a8aa0b1a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-239.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-239
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, TypeError is thrown if the [[Configurable]]
+    attribute value of 'name' is false, and [[Enumerable]] of 'desc'
+    is present and its value is different from the [[Enumerable]]
+    attribute value of 'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: 3,
+  writable: true,
+  configurable: false,
+  enumerable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: 13,
+    writable: true,
+    enumerable: true
+  });
+  throw new Test262Error("Expected an exception.");
+
+} catch (e) {
+  verifyEqualTo(arrObj, "1", 3);
+
+  verifyWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-24.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-24.js
new file mode 100644
index 0000000000..0254703005
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-24.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-24
+description: >
+    Object.defineProperty - 'name' is own data property that overrides
+    an inherited data property (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  value: 12,
+  configurable: true
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+Object.defineProperty(obj, "foo", {
+  value: 11,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    configurable: true
+  });
+});
+assert.sameValue(obj.foo, 11, 'obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js
new file mode 100644
index 0000000000..e74b2479d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-240.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-240
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, TypeError is thrown if 'name' is accessor
+    property, and 'desc' is data descriptor, and the [[Configurable]]
+    attribute value of 'name' is false (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "1", {
+  set: setFunc,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: 13
+  });
+  throw new Test262Error("Expected an exception.");
+
+} catch (e) {
+  verifyWritable(arrObj, "1", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js
new file mode 100644
index 0000000000..8923abc966
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-241.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-241
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, TypeError is thrown if  'name' is data property,
+    and'desc' is accessor descriptor, and the [[Configurable]]
+    attribute value of 'name' is false (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: 3,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    set: function() {}
+  });
+  throw new Test262Error("Expected an exception.");
+
+} catch (e) {
+  verifyEqualTo(arrObj, "1", 3);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js
new file mode 100644
index 0000000000..7c21f48ca5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242-1.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-242-1
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property,  'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    true, test 'name' is updated successfully (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [3];
+
+Object.defineProperty(arrObj, "0", {
+  value: 1001,
+  writable: false,
+  enumerable: false
+});
+
+verifyEqualTo(arrObj, "0", 1001);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js
new file mode 100644
index 0000000000..5f1d4a8dce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-242.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-242
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property,  'name' is data property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    true, test 'name' is converted from data property to accessor
+    property (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [3];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "0", {
+  set: setFunc
+});
+
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js
new file mode 100644
index 0000000000..a87d6172ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-1.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-243-1
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property,  'name' is accessor property and  assignment to
+    the accessor property, fails to convert accessor property from
+    accessor property to data property (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 3;
+}
+Object.defineProperty(arrObj, "1", {
+  get: getFunc,
+  configurable: true
+});
+
+arrObj[1] = 4;
+
+verifyEqualTo(arrObj, "1", getFunc());
+
+verifyNotEnumerable(arrObj, "1");
+
+verifyConfigurable(arrObj, "1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js
new file mode 100644
index 0000000000..ef5649662c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243-2-strict.js
@@ -0,0 +1,36 @@
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-243-2
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property,  'name' is accessor property and  assignment to
+    the accessor property, fails to convert accessor property from
+    accessor property to data property (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+flags: [onlyStrict]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 3;
+}
+Object.defineProperty(arrObj, "1", {
+  get: getFunc,
+  configurable: true
+});
+
+assert.throws(TypeError, function() {
+  arrObj[1] = 4;
+});
+verifyEqualTo(arrObj, "1", getFunc());
+
+verifyNotEnumerable(arrObj, "1");
+
+verifyConfigurable(arrObj, "1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js
new file mode 100644
index 0000000000..08a11f8705
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-243.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-243
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property,  'name' is accessor property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    true, test 'name' is converted from accessor property to data
+    property (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 3;
+}
+Object.defineProperty(arrObj, "1", {
+  get: getFunc,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "1", {
+  value: 12
+});
+
+verifyEqualTo(arrObj, "1", 12);
+
+verifyNotWritable(arrObj, "1");
+
+verifyNotEnumerable(arrObj, "1");
+
+verifyConfigurable(arrObj, "1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js
new file mode 100644
index 0000000000..e5e1d30c7b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-244.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-244
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false and the [[Writable]] field of 'desc' is
+    true (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  writable: false,
+  configurable: false
+});
+
+try {
+
+  Object.defineProperty(arrObj, "1", {
+    writable: true
+  });
+  throw new Test262Error("Expected an exception.");
+
+} catch (e) {
+  verifyEqualTo(arrObj, "1", undefined);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js
new file mode 100644
index 0000000000..eae22cfee2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-245.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-245
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the type of the [[Value]] field of
+    'desc' is different from the type of the [[Value]] attribute value
+    of 'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: 3,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: "abc"
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", 3);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js
new file mode 100644
index 0000000000..dddbc50767
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-246.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-246
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the [[Value]] field of 'desc' is +0,
+    and the [[Value]] attribute value of 'name' is -0 (15.4.5.1 step
+    4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: -0
+
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: +0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", -0);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js
new file mode 100644
index 0000000000..1a3085a231
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-247.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-247
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the [[Value]] field of 'desc' is -0,
+    and the [[Value]] attribute value of 'name' is +0 (15.4.5.1 step
+    4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: +0
+});
+
+try {
+
+  Object.defineProperty(arrObj, "1", {
+    value: -0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", +0);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js
new file mode 100644
index 0000000000..b946c44ae1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-248.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-248
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the [[Value]] field of 'desc' and
+    the [[Value]] attribute value of 'name' are two numbers with
+    different vaules (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: 12
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: 15
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", 12);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js
new file mode 100644
index 0000000000..9a7132c20f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-249.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-249
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the [[Value]] field of 'desc' and
+    the [[Value]] attribute value of 'name' are two strings with
+    different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: "abc"
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: "fgh"
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", "abc");
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-25.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-25.js
new file mode 100644
index 0000000000..dd8be9d5af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-25.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-25
+description: >
+    Object.defineProperty - 'data' is own data property that overrides
+    an inherited accessor property (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  get: function() {},
+  configurable: true
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+Object.defineProperty(obj, "foo", {
+  value: 11,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    configurable: true
+  });
+});
+assert.sameValue(obj.foo, 11, 'obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js
new file mode 100644
index 0000000000..e4710d7ef8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-250.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-250
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the [[Value]] field of 'desc' and
+    the [[Value]] attribute value of 'name' are two booleans with
+    different values (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  value: false
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", false);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js
new file mode 100644
index 0000000000..594cb3a3ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-251.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-251
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is data property and 'desc' is data
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Writable]] attribute
+    value of 'name' is false, and the [[Value]] field of 'desc' and
+    the [[Value]] attribute value of 'name' are two objects which
+    refer to the different objects (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+var obj = {
+  length: 10
+};
+
+Object.defineProperty(arrObj, "1", {
+  value: obj
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    value: {}
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", obj);
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js
new file mode 100644
index 0000000000..ab56258dc1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-252.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-252
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is accessor property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Set]] field of 'desc' is
+    present, and the [[Set]] field of 'desc' and the [[Set]] attribute
+    value of 'name' are two objects which refer to the different
+    objects (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "1", {
+  set: setFunc
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    set: function() {}
+  });
+  throw new Test262Error("Expected an exception.");
+
+} catch (e) {
+  verifyWritable(arrObj, "1", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js
new file mode 100644
index 0000000000..a6fbb2221c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-253.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-253
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is accessor property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Set]] field of 'desc' is
+    present, and the [[Set]] field of 'desc' is an object and the
+    [[Set]] attribute value of 'name' is undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+
+Object.defineProperty(arrObj, "1", {
+  get: getFunc,
+  set: undefined
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    set: function() {}
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "1", getFunc());
+
+  verifyNotEnumerable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js
new file mode 100644
index 0000000000..857f5bd3e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-254.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-254
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is accessor property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is not thrown if the [[Set]] field of 'desc'
+    is present, and the [[Set]] field of 'desc' and the [[Set]]
+    attribute value of 'name' are undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "1", {
+  set: undefined
+});
+assert(arrObj.hasOwnProperty("1"));
+
+Object.defineProperty(arrObj, "1", {
+  set: undefined
+});
+
+var desc = Object.getOwnPropertyDescriptor(arrObj, "1");
+
+assert(desc.hasOwnProperty("get") && typeof desc.get === "undefined");
+assert(desc.hasOwnProperty("set") && typeof desc.set === "undefined");
+
+verifyNotEnumerable(arrObj, "1");
+verifyNotConfigurable(arrObj, "1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js
new file mode 100644
index 0000000000..03e3d8a268
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-255.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-255
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is accessor property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Get]] field of 'desc' is
+    present, and the [[Get]] field of 'desc' and the [[Get]] attribute
+    value of 'name' are two objects which refer to the different
+    objects (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+Object.defineProperty(arrObj, "1", {
+  get: getFunc
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    get: function() {
+      return 14;
+    }
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+  assert(arrObj.hasOwnProperty("1"));
+
+  var desc = Object.getOwnPropertyDescriptor(arrObj, "1");
+
+  assert(arrObj[1] === getFunc());
+
+  assert(desc.hasOwnProperty("set") && typeof desc.set === "undefined");
+
+  verifyNotEnumerable(arrObj, "1");
+  verifyNotConfigurable(arrObj, "1");
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js
new file mode 100644
index 0000000000..a015f2a9a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-256.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-256
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is accessor property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is thrown if the [[Get]] field of 'desc' is
+    present, and the [[Get]] field of 'desc' is an object and the
+    [[Get]] attribute value of 'name' is undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+
+Object.defineProperty(arrObj, "1", {
+  get: getFunc
+});
+
+try {
+  Object.defineProperty(arrObj, "1", {
+    get: undefined
+  });
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+  assert(arrObj.hasOwnProperty("1"));
+
+  var desc = Object.getOwnPropertyDescriptor(arrObj, "1");
+
+  assert(arrObj[1] === getFunc());
+  assert(desc.hasOwnProperty("set") && typeof desc.set === "undefined");
+
+  verifyNotWritable(arrObj, "1");
+
+  verifyNotConfigurable(arrObj, "1");
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js
new file mode 100644
index 0000000000..e6e8c2d369
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-257.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-257
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, 'name' is accessor property and 'desc' is accessor
+    descriptor, and the [[Configurable]] attribute value of 'name' is
+    false, test TypeError is not thrown if the [[Get]] field of 'desc'
+    is present, and the [[Get]] field of 'desc' and the [[Get]]
+    attribute value of 'name' are undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "1", {
+  get: undefined,
+  set: setFunc,
+  configurable: false
+});
+
+Object.defineProperty(arrObj, "1", {
+  get: undefined
+});
+
+verifyWritable(arrObj, "1", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "1");
+
+verifyNotConfigurable(arrObj, "1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js
new file mode 100644
index 0000000000..9821d646bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-258.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-258
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test updating the [[Value]] attribute value of 'name'
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [100];
+
+Object.defineProperty(arrObj, "0", {
+  value: 200
+});
+verifyEqualTo(arrObj, "0", 200);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js
new file mode 100644
index 0000000000..b0fbd5e780
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-259.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-259
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test setting the [[Value]] attribute value of 'name'
+    as undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [100];
+
+Object.defineProperty(arrObj, "0", {
+  value: undefined
+});
+verifyEqualTo(arrObj, "0", undefined);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-26.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-26.js
new file mode 100644
index 0000000000..5f6f340564
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-26.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-26
+description: >
+    Object.defineProperty - 'name' is own accessor property (8.12.9
+    step 1)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return 11;
+  },
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "property", {
+    get: function() {
+      return 12;
+    },
+    configurable: true
+  });
+});
+assert.sameValue(obj.property, 11, 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js
new file mode 100644
index 0000000000..5e2b69c160
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-260.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-260
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test setting the [[Value]] attribute value of 'name'
+    from undefined to number (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [undefined];
+Object.defineProperty(arrObj, "0", {
+  value: 100
+});
+verifyEqualTo(arrObj, "0", 100);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js
new file mode 100644
index 0000000000..e945f54eeb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-261.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-261
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test updating the [[Writable]] attribute value of
+    'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [100];
+Object.defineProperty(arrObj, "0", {
+  writable: false
+});
+verifyEqualTo(arrObj, "0", 100);
+
+verifyNotWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js
new file mode 100644
index 0000000000..aed61cb5ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-262.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-262
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test updating the [[Enumerable]] attribute value of
+    'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [100];
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: false
+});
+verifyEqualTo(arrObj, "0", 100);
+
+verifyWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js
new file mode 100644
index 0000000000..b0b4ea2cc0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-263.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-263
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test updating the [[Configurable]] attribute value of
+    'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [100];
+
+Object.defineProperty(arrObj, "0", {
+  configurable: false
+});
+verifyEqualTo(arrObj, "0", 100);
+
+verifyWritable(arrObj, "0");
+
+verifyEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js
new file mode 100644
index 0000000000..a7d2eac7f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-264.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-264
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is data property and 'desc' is data
+    descriptor, test updating multiple attribute values of 'name'
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [100];
+Object.defineProperty(arrObj, "0", {
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+verifyEqualTo(arrObj, "0", 100);
+
+verifyNotWritable(arrObj, "0");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js
new file mode 100644
index 0000000000..f68fdd93f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-265.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-265
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating the [[Get]] attribute value of 'name'
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 100;
+}
+Object.defineProperty(arrObj, "0", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+Object.defineProperty(arrObj, "0", {
+  get: getFunc
+});
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js
new file mode 100644
index 0000000000..98d664d424
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-266.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-266
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test setting the [[Get]] attribute value of 'name' as
+    undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  get: undefined
+});
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js
new file mode 100644
index 0000000000..b1d1f3c19e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-267.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-267
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating the [[Get]] attribute value of 'name'
+    from undefined to function object (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+Object.defineProperty(arrObj, "0", {
+  get: undefined,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  get: getFunc
+});
+verifyEqualTo(arrObj, "0", getFunc());
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js
new file mode 100644
index 0000000000..8f65ec43a1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-268.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-268
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating the [[Set]] attribute value of 'name'
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc
+});
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js
new file mode 100644
index 0000000000..84be2830ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-269.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-269
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test setting the [[Set]] attribute value of 'name' as
+    undefined (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "0", {
+  set: function() {},
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  set: undefined
+});
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-27.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-27.js
new file mode 100644
index 0000000000..44511c75b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-27.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-27
+description: >
+    Object.defineProperty - 'name' is an inherited accessor property
+    (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "property", {
+  get: function() {
+    return 11;
+  },
+  configurable: false
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return 12;
+  },
+  configurable: true
+});
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert.sameValue(obj.property, 12, 'obj.property');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js
new file mode 100644
index 0000000000..696ebb956a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-270.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-270
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating the [[Set]] attribute value of 'name'
+    from undefined to function object (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  set: undefined,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc
+});
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js
new file mode 100644
index 0000000000..e82084fe9e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-271.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-271
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating the [[Enumerable]] attribute value of
+    'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  enumerable: false
+});
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js
new file mode 100644
index 0000000000..663614560e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-272.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-272
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating the [[Configurable]] attribute value of
+    'name' (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "0", {
+  set: setFunc,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "0", {
+  configurable: false
+});
+verifyWritable(arrObj, "0", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "0");
+
+verifyNotConfigurable(arrObj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js
new file mode 100644
index 0000000000..14d45dbbb5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-273.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-273
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, name is accessor property and 'desc' is accessor
+    descriptor, test updating multiple attribute values of 'name'
+    (15.4.5.1 step 4.c)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+function getFunc() {
+  return 12;
+}
+Object.defineProperty(arrObj, "1", {
+  get: function() {
+    return 6;
+  },
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(arrObj, "1", {
+  get: getFunc,
+  enumerable: false,
+  configurable: false
+});
+verifyEqualTo(arrObj, "1", getFunc());
+
+verifyWritable(arrObj, "1", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "1");
+
+verifyNotConfigurable(arrObj, "1");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-274.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-274.js
new file mode 100644
index 0000000000..39367644a2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-274.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-274
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, test the length property of 'O' is not changed if
+    ToUint32('name') is less than value of the length property in 'O'
+    (15.4.5.1 step 4.e)
+---*/
+
+var arrObj = [];
+arrObj.length = 3; // default value of length: writable: true, configurable: false, enumerable: false
+
+Object.defineProperty(arrObj, "1", {
+  value: 14
+});
+
+assert.sameValue(arrObj.length, 3, 'arrObj.length');
+assert.sameValue(arrObj[1], 14, 'arrObj[1]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-275.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-275.js
new file mode 100644
index 0000000000..ce176462cc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-275.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-275
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, test the length property of 'O' is set as
+    ToUint32('name') + 1 if ToUint32('name') equals to value of the
+    length property in 'O' (15.4.5.1 step 4.e.ii)
+---*/
+
+var arrObj = [];
+arrObj.length = 3; // default value of length: writable: true, configurable: false, enumerable: false
+
+Object.defineProperty(arrObj, "3", {
+  value: 3
+});
+
+assert.sameValue(arrObj.length, 4, 'arrObj.length');
+assert.sameValue(arrObj[3], 3, 'arrObj[3]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-276.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-276.js
new file mode 100644
index 0000000000..a5b4616b80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-276.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-276
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is an array index
+    named property, test the length property of 'O' is set as
+    ToUint32('name') + 1 if ToUint32('name') is greater than value of
+    the length property in 'O' (15.4.5.1 step 4.e.ii)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "5", {
+  value: 3
+});
+
+assert.sameValue(arrObj.length, 6, 'arrObj.length');
+assert.sameValue(arrObj[5], 3, 'arrObj[5]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js
new file mode 100644
index 0000000000..825c594a6b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-277.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-277
+description: >
+    Object.defineProperty -  'O' is an Array, 'name' is generic
+    property that won't exist on 'O', and 'desc' is data descriptor,
+    test 'name' is defined in 'O' with all correct attribute values
+    (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "property", {
+  value: 12,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+verifyEqualTo(arrObj, "property", 12);
+
+verifyWritable(arrObj, "property");
+
+verifyEnumerable(arrObj, "property");
+
+verifyConfigurable(arrObj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js
new file mode 100644
index 0000000000..4ad70e2558
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-278.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-278
+description: >
+    Object.defineProperty - 'name' is generic property that won't
+    exist on 'O', and 'desc' is accessor descriptor, test 'name' is
+    defined in 'O' with all correct attribute values (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(arrObj, "property", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+verifyEqualTo(arrObj, "property", getFunc());
+
+verifyWritable(arrObj, "property", "setVerifyHelpProp");
+
+verifyEnumerable(arrObj, "property");
+
+verifyConfigurable(arrObj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js
new file mode 100644
index 0000000000..9f78e7cc67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-279.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-279
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    accessor property of 'O', and 'desc' is accessor descriptor, test
+    updating multiple attribute values of 'name' (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "property", {
+  get: function() {
+    return 24;
+  },
+  enumerable: true,
+  configurable: true
+});
+Object.defineProperty(arrObj, "property", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(arrObj, "property", getFunc());
+
+verifyWritable(arrObj, "property", "setVerifyHelpProp");
+
+verifyNotEnumerable(arrObj, "property");
+
+verifyNotConfigurable(arrObj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-28.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-28.js
new file mode 100644
index 0000000000..12ce2647fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-28.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-28
+description: >
+    Object.defineProperty - 'name' is own accessor property that
+    overrides an inherited data property (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  value: 11,
+  configurable: true
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+Object.defineProperty(obj, "foo", {
+  get: function() {},
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js
new file mode 100644
index 0000000000..7315c8c784
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-280.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-280
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    data property of 'O', and 'desc' is data descriptor, test updating
+    multiple attribute values of 'name' (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+arrObj.property = 12; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(arrObj, "property", {
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(arrObj, "property", 12);
+
+verifyNotWritable(arrObj, "property");
+
+verifyNotEnumerable(arrObj, "property");
+
+verifyNotConfigurable(arrObj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js
new file mode 100644
index 0000000000..67ec5776bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-281.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-281
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Value]] attribute value of 'name' which is defined as
+    non-writable and non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "property", {
+  value: 12
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    value: 36
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "property", 12);
+
+  verifyNotWritable(arrObj, "property");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js
new file mode 100644
index 0000000000..0b05899bc6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-282.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-282
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Writable]] attribute value of 'name' which is defined as
+    non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "property", {
+  writable: false
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    writable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "property", undefined);
+
+  verifyNotWritable(arrObj, "property");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js
new file mode 100644
index 0000000000..7ca939b4f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-283.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-283
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Enumerable]] attribute value of 'name' which is defined as
+    non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "property", {
+  value: 12,
+  enumerable: false
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    enumerable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "property", 12);
+
+  verifyNotWritable(arrObj, "property");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js
new file mode 100644
index 0000000000..48bd118b9c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-284.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-284
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Configurable]] attribute value of 'name' which is defined as
+    non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "property", {
+  value: 12
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    configurable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "property", 12);
+
+  verifyNotWritable(arrObj, "property");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js
new file mode 100644
index 0000000000..055d7d32d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-285.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-285
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Get]] attribute value of 'name' which is defined as
+    non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function getFunc() {
+  return 12;
+}
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "property", {
+  get: getFunc,
+  set: setFunc
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    get: function() {
+      return 36;
+    }
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(arrObj, "property", getFunc());
+
+  verifyWritable(arrObj, "property", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js
new file mode 100644
index 0000000000..ebf54b5e61
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-286.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-286
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    accessor property of 'O', and 'desc' is accessor descriptor, test
+    TypeError is thrown when updating the [[Set]] attribute value of
+    'name' (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "property", {
+  set: setFunc
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    set: function() {}
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyWritable(arrObj, "property", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js
new file mode 100644
index 0000000000..3aa609e301
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-287.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-287
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Enumerable]] attribute value of 'name' which is defined as
+    non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "property", {
+  set: setFunc,
+  enumerable: false
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    enumerable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyWritable(arrObj, "property", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js
new file mode 100644
index 0000000000..99317bcbab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-288.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-288
+description: >
+    Object.defineProperty - 'O' is an Array, 'name' is generic own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Configurable]] attribute value of 'name' which is defined as
+    non-configurable (15.4.5.1 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var arrObj = [];
+
+function setFunc(value) {
+  arrObj.setVerifyHelpProp = value;
+}
+Object.defineProperty(arrObj, "property", {
+  set: setFunc,
+  configurable: false
+});
+try {
+  Object.defineProperty(arrObj, "property", {
+    configurable: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyWritable(arrObj, "property", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arrObj, "property");
+
+  verifyNotConfigurable(arrObj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js
new file mode 100644
index 0000000000..9c16dbb07a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289-1.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-289-1
+description: >
+ Object.defineProperty - 'O' is an Arguments object of a function
+ that has formal parameters, 'name' is own property which is
+ defined in both [[ParameterMap]] of 'O' and 'O', and is deleted
+ afterwards, and 'desc' is data descriptor, test 'name' is
+ redefined in 'O' with all correct attribute values (10.6
+ [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+;
+(function(a, b, c) {
+  delete arguments[0];
+
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: true,
+    enumerable: true,
+    configurable: true
+  });
+
+  if (a !== 0) {
+    throw new Test262Error("Expected a === 0, actually " + a);
+  }
+
+  verifyEqualTo(arguments, "0", 10);
+
+  verifyWritable(arguments, "0");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js
new file mode 100644
index 0000000000..4b90e38ef6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-289.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-289
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    property of 'O', and is deleted afterwards, and 'desc' is data
+    descriptor, test 'name' is redefined in 'O' with all correct
+    attribute values (10.6 [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  delete arguments[0];
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: true,
+    enumerable: true,
+    configurable: true
+  });
+  verifyEqualTo(arguments, "0", 10);
+
+  verifyWritable(arguments, "0");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-29.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-29.js
new file mode 100644
index 0000000000..4ffa113be7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-29.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-29
+description: >
+    Object.defineProperty - 'name' is own accessor property that
+    overrides an inherited accessor property (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  get: function() {},
+  configurable: true
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+Object.defineProperty(obj, "foo", {
+  get: function() {},
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js
new file mode 100644
index 0000000000..71fa4baeff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290-1.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-290-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own property which is
+    defined in both [[ParameterMap]] of 'O' and 'O', is deleted
+    afterwards, and 'desc' is accessor descriptor, test 'name' is
+    redefined in 'O' with all correct attribute values (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  delete arguments[0];
+
+  function getFunc() {
+    return 10;
+  }
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: true,
+    configurable: true
+  });
+  if (a !== 0) {
+    throw new Test262Error('Expected a === 0, actually ' + a);
+  }
+
+  verifyEqualTo(arguments, "0", getFunc());
+
+  verifyWritable(arguments, "0", "setVerifyHelpProp");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js
new file mode 100644
index 0000000000..6b4d350268
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-290.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-290
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    property of 'O', and is deleted afterwards, and 'desc' is accessor
+    descriptor, test 'name' is redefined in 'O' with all correct
+    attribute values (10.6 [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  delete arguments[0];
+
+  function getFunc() {
+    return 10;
+  }
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: true,
+    configurable: true
+  });
+  verifyEqualTo(arguments, "0", getFunc());
+
+  verifyWritable(arguments, "0", "setVerifyHelpProp");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js
new file mode 100644
index 0000000000..04faea4a9e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291-1.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-291-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own accessor property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', and 'desc' is
+    accessor descriptor, test updating multiple attribute values of
+    'name' (10.6 [[DefineOwnProperty]] step 3 and 5.a.i)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc1() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc1,
+    enumerable: true,
+    configurable: true
+  });
+
+  function getFunc2() {
+    return 20;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc2,
+    enumerable: false,
+    configurable: false
+  });
+  if (a !== 0) {
+    throw new Test262Error('Expected a === 0, actually ' + a);
+  }
+
+  verifyEqualTo(arguments, "0", getFunc2());
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js
new file mode 100644
index 0000000000..0d936a72a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-291.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-291
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    accessor property of 'O', and 'desc' is accessor descriptor, test
+    updating multiple attribute values of 'name' (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc1() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc1,
+    enumerable: true,
+    configurable: true
+  });
+
+  function getFunc2() {
+    return 20;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc2,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "0", getFunc2());
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js
new file mode 100644
index 0000000000..124143b87c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-1.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-292-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own property of 'O' which is
+    also defined in [[ParameterMap]] of 'O', and 'desc' is data
+    descriptor, test updating multiple attribute values of 'name'
+    (10.6 [[DefineOwnProperty]] step 3 and 5.b)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+
+  if (a !== 20) {
+    throw new Test262Error('Expected a === 20, actually ' + a);
+  }
+
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js
new file mode 100644
index 0000000000..5327e61f5d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292-2-strict.js
@@ -0,0 +1,38 @@
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-292-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own property of 'O' which is
+    also defined in [[ParameterMap]] of 'O', and 'desc' is data
+    descriptor, test updating multiple attribute values of 'name'
+    (10.6 [[DefineOwnProperty]] step 3 and 5.b)
+includes: [propertyHelper.js]
+flags: [onlyStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+
+  if (a !== 0) {
+    throw new Test262Error('Expected a === 0, actually ' + a);
+  }
+
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js
new file mode 100644
index 0000000000..7091d42cf8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-292.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-292
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    data property of 'O', and 'desc' is data descriptor, test updating
+    multiple attribute values of 'name' (10.6 [[DefineOwnProperty]]
+    step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js
new file mode 100644
index 0000000000..642e95f413
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-1.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-293-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    data property of 'O', test TypeError is not thrown when updating
+    the [[Value]] attribute value of 'name' which is defined as
+    non-writable and configurable (10.6 [[DefineOwnProperty]] step 3
+    and 5b)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false
+  });
+  Object.defineProperty(arguments, "0", {
+    value: 20
+  });
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js
new file mode 100644
index 0000000000..063ab121d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-2.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-293-2
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Value]] attribute value of 'name'
+    which is defined as unwritable and non-configurable (10.6
+    [[DefineOwnProperty]] step 4 and step 5b)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      value: 20
+    });
+    throw new Test262Error("Expected an exception.");
+
+  } catch (e) {
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (a !== 10) {
+      throw new Test262Error('Expected "a === 10", actually ' + a);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js
new file mode 100644
index 0000000000..a27f584a65
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-3.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-293-3
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is not thrown when updating the [[Value]] attribute value of
+    'name' which is defined as non-writable and configurable (10.6
+    [[DefineOwnProperty]] step 3 and step 5.b)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+  });
+  Object.defineProperty(arguments, "0", {
+    value: 20
+  });
+  if (a !== 10) {
+    throw new Test262Error('Expected "a === 10", actually ' + a);
+  }
+
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js
new file mode 100644
index 0000000000..03ace78694
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293-4-strict.js
@@ -0,0 +1,39 @@
+'use strict';
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-293-4
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is not thrown when updating the [[Value]] attribute value of
+    'name' which is defined as non-writable and configurable (10.6
+    [[DefineOwnProperty]] step 3 and step 5.b)
+includes: [propertyHelper.js]
+flags: [onlyStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+  });
+  Object.defineProperty(arguments, "0", {
+    value: 20
+  });
+  if (a !== 0) {
+    throw new Test262Error('Expected "a === 0", actually ' + a);
+  }
+
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyEnumerable(arguments, "0");
+
+  verifyConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js
new file mode 100644
index 0000000000..4ca208ba8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-293.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-293
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Value]] attribute value of 'name' which is defined as
+    non-writable and non-configurable (10.6 [[DefineOwnProperty]] step
+    3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      value: 20
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js
new file mode 100644
index 0000000000..e358ab75e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294-1.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-294-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Writable]] attribute value of 'name'
+    which is defined as non-configurable (10.6 [[DefineOwnProperty]]
+    step 4 and 5b)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      writable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (a !== 10) {
+      throw new Test262Error('Expected "a === 10", actually ' + a);
+    }
+
+  }
+
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js
new file mode 100644
index 0000000000..08c69e755e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-294.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-294
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Writable]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      writable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js
new file mode 100644
index 0000000000..394066dfc2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295-1.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-295-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Enumerable]] attribute value of
+    'name' which is defined as non-configurable (10.6
+    [[DefineOwnProperty]] step 4 and step 5b)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (a !== 10) {
+      throw new Test262Error('Expected "a === 10", actually ' + a);
+    }
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js
new file mode 100644
index 0000000000..cd7eb340b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-295.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-295
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Enumerable]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js
new file mode 100644
index 0000000000..77e9fe1642
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296-1.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-296-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Configurable]] attribute value of
+    'name' which is defined as non-configurable (10.6
+    [[DefineOwnProperty]] step 4 and step 5b)
+includes: [propertyHelper.js]
+flags: [noStrict]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (a !== 10) {
+      throw new Test262Error('Expected "a === 10", actually ' + a);
+    }
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js
new file mode 100644
index 0000000000..8625821007
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-296.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-296
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Configurable]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 10);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js
new file mode 100644
index 0000000000..8627560fa9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297-1.js
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-297-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own accessor property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Get]] attribute value of 'name'
+    which is defined as non-configurable (10.6 [[DefineOwnProperty]]
+    step 4 and step 5a)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc1() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc1,
+    enumerable: false,
+    configurable: false
+  });
+
+  function getFunc2() {
+    return 20;
+  }
+  try {
+    Object.defineProperty(arguments, "0", {
+      get: getFunc2
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (a !== 0) {
+      throw new Test262Error('Expected a === 0, actually ' + a);
+    }
+
+    verifyEqualTo(arguments, "0", getFunc1());
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js
new file mode 100644
index 0000000000..e738fc84a3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-297.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-297
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Get]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc1() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc1,
+    enumerable: false,
+    configurable: false
+  });
+
+  function getFunc2() {
+    return 20;
+  }
+  try {
+    Object.defineProperty(arguments, "0", {
+      get: getFunc2
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc1());
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js
new file mode 100644
index 0000000000..9cb976b0fd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298-1.js
@@ -0,0 +1,53 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-298-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own accessor property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Set]] attribute value of 'name'
+    which is defined as non-configurable (10.6 [[DefineOwnProperty]]
+    steps 4 and 5a)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: undefined,
+    enumerable: false,
+    configurable: false
+  });
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  try {
+    Object.defineProperty(arguments, "0", {
+      set: setFunc
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (a !== 0) {
+      throw new Test262Error('Expected a === 0, actually ' + a);
+    }
+
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js
new file mode 100644
index 0000000000..651330f8f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-298.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-298
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Set]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: undefined,
+    enumerable: false,
+    configurable: false
+  });
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  try {
+    Object.defineProperty(arguments, "0", {
+      set: setFunc
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js
new file mode 100644
index 0000000000..2ef3e98416
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299-1.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-299-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own accessor property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Enumerable]] attribute value of
+    'name' which is defined as non-configurable (10.6
+    [[DefineOwnProperty]] steps 4 and 5a)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (a !== 0) {
+      throw new Test262Error('Expected a === 0, actually ' + a);
+    }
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js
new file mode 100644
index 0000000000..8294112d3a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-299.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-299
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Enumerable]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-3.js
new file mode 100644
index 0000000000..9273fd373c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-3.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For newly defined accessor properties, attributes
+    missing from desc should have values set to the defaults from 8.6.1.
+es5id: 15.2.3.6-4-3
+description: >
+    Object.defineProperty sets missing attributes to their default
+    values (accessor)(8.12.9 step 4.b.i)
+---*/
+
+var o = {};
+
+var getter = function() {
+  return 1;
+};
+var desc = {
+  get: getter
+};
+
+Object.defineProperty(o, "foo", desc);
+
+var propDesc = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(typeof(propDesc.get), "function", 'typeof(propDesc.get)');
+assert.sameValue(propDesc.get, getter, 'propDesc.get'); // the getter must be the function that was provided
+assert.sameValue(propDesc.set, undefined, 'propDesc.set'); // undefined by default
+assert.sameValue(propDesc.enumerable, false, 'propDesc.enumerable'); // false by default
+assert.sameValue(propDesc.configurable, false, 'propDesc.configurable'); // false by default
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-30.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-30.js
new file mode 100644
index 0000000000..b86fe03227
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-30.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-30
+description: >
+    Object.defineProperty - 'name' is own accessor property without a
+    get function (8.12.9 step 1)
+---*/
+
+var obj = {};
+Object.defineProperty(obj, "foo", {
+  set: function() {},
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js
new file mode 100644
index 0000000000..802dd24613
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300-1.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-300-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own accessor property of 'O'
+    which is also defined in [[ParameterMap]] of 'O', test TypeError
+    is thrown when updating the [[Configurable]] attribute value of
+    'name' which is defined as non-configurable (10.6
+    [[DefineOwnProperty]] step 4 and step 5a)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc() {
+    return 0;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (a !== 0) {
+      throw new Test262Error('Expected a === 0, actually ' + a);
+    }
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js
new file mode 100644
index 0000000000..2341d87dca
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-300.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-300
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Configurable]] attribute value of 'name' which is defined as
+    non-configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js
new file mode 100644
index 0000000000..50854b502f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301-1.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-301-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is an index named property of
+    'O', and 'desc' is data descriptor, test 'name' is defined in 'O'
+    with all correct attribute values (10.6 [[DefineOwnProperty]] step
+    3)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  delete arguments[0];
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  if (a !== 0) {
+    throw new Test262Error("Expected a === 0, actually " + a);
+  }
+  verifyEqualTo(arguments, "0", 10);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js
new file mode 100644
index 0000000000..6387b45b3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-301.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-301
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    array index named property of 'O' but not defined in
+    [[ParameterMap]] of 'O', and 'desc' is data descriptor, test
+    'name' is defined in 'O' with all correct attribute values (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  delete arguments[0];
+  Object.defineProperty(arguments, "0", {
+    value: 10,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "0", 10);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js
new file mode 100644
index 0000000000..d9e24450e1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302-1.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-302-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is an index named property of
+    'O' but not defined in [[ParameterMap]] of 'O', and 'desc' is
+    accessor descriptor, test 'name' is defined in 'O' with all
+    correct attribute values (10.6 [[DefineOwnProperty]] step 3 and
+    step 5a)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  delete arguments[0];
+
+  function getFunc() {
+    return 10;
+  }
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: false,
+    configurable: false
+  });
+  if (a !== 0) {
+    throw new Test262Error('Expected a === 0, actually ' + a);
+  }
+  verifyEqualTo(arguments, "0", getFunc());
+
+  verifyWritable(arguments, "0", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js
new file mode 100644
index 0000000000..40fe4d4fcd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-302.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-302
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named property of 'O' but not defined in [[ParameterMap]] of
+    'O', and 'desc' is accessor descriptor, test 'name' is defined in
+    'O' with all correct attribute values (10.6 [[DefineOwnProperty]]
+    step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  delete arguments[0];
+
+  function getFunc() {
+    return 10;
+  }
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "0", getFunc());
+
+  verifyWritable(arguments, "0", "setVerifyHelpProp");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}(0, 1, 2));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js
new file mode 100644
index 0000000000..e1d15a9dcd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-303.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-303
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named accessor property of 'O' but not defined in
+    [[ParameterMap]] of 'O', and 'desc' is accessor descriptor, test
+    updating multiple attribute values of 'name' (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc1() {
+    return 10;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc1,
+    enumerable: true,
+    configurable: true
+  });
+
+  function getFunc2() {
+    return 20;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc2,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "0", getFunc2());
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js
new file mode 100644
index 0000000000..058949b82b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-304.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-304
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named data property of 'O' but not defined in
+    [[ParameterMap]] of 'O', and 'desc' is data descriptor, test
+    updating multiple attribute values of 'name' (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 20,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "0", 20);
+
+  verifyNotWritable(arguments, "0");
+
+  verifyNotEnumerable(arguments, "0");
+
+  verifyNotConfigurable(arguments, "0");
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js
new file mode 100644
index 0000000000..88e3ea9526
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-305.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-305
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named data property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Value]] attribute value of 'name' which is not writable and
+    not configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    configurable: false
+  });
+
+  try {
+    Object.defineProperty(arguments, "0", {
+      value: 10
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 0);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js
new file mode 100644
index 0000000000..a33eff559b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-306.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-306
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named data property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Writable]] attribute value of 'name' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      writable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 0);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js
new file mode 100644
index 0000000000..c9fdf870ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-307.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-307
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named data property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Enumerable]] attribute value of 'name' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 0);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js
new file mode 100644
index 0000000000..aceabc53a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-308.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-308
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named data property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Configurable]] attribute value of 'name' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "0", {
+    value: 0,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", 0);
+
+    verifyNotWritable(arguments, "0");
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js
new file mode 100644
index 0000000000..f1803f13cd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-309.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-309
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named accessor property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Get]] attribute value of 'name' which is not configurable
+    (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc1() {
+    return 0;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc1,
+    enumerable: false,
+    configurable: false
+  });
+
+  function getFunc2() {
+    return 10;
+  }
+  try {
+    Object.defineProperty(arguments, "0", {
+      get: getFunc2
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc1());
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-31.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-31.js
new file mode 100644
index 0000000000..bb0adb7433
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-31.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-31
+description: >
+    Object.defineProperty - 'name' is own accessor property without a
+    get function that overrides an inherited accessor property(8.12.9
+    step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  get: function() {},
+  configurable: true
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+Object.defineProperty(obj, "foo", {
+  set: function() {},
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js
new file mode 100644
index 0000000000..094229861a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-310.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-310
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named accessor property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Set]] attribute value of 'name' which is not configurable
+    (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return 0;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    set: undefined,
+    enumerable: false,
+    configurable: false
+  });
+
+  function setFunc(value) {
+    this.setVerifyHelpProp = value;
+  }
+  try {
+    Object.defineProperty(arguments, "0", {
+      set: setFunc
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyNotEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js
new file mode 100644
index 0000000000..ede81f7918
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-311.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-311
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named accessor property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Enumerable]] attribute value of 'name' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return 0;
+  }
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js
new file mode 100644
index 0000000000..eaf2c27fab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-312.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-312
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is an
+    index named accessor property of 'O' but not defined in
+    [[ParameterMap]] of 'O', test TypeError is thrown when updating
+    the [[Configurable]] attribute value of 'name' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {}
+  Object.defineProperty(arguments, "0", {
+    get: getFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "0", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "0", getFunc());
+
+    verifyEnumerable(arguments, "0");
+
+    verifyNotConfigurable(arguments, "0");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}());
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js
new file mode 100644
index 0000000000..24f6b77d8b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313-1.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-313-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own property, and 'desc' is
+    data descriptor, test 'P' is defined in 'O' with all correct
+    attribute values (10.6 [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: true,
+    enumerable: true,
+    configurable: true
+  });
+  verifyEqualTo(arguments, "genericProperty", 1001);
+
+  verifyWritable(arguments, "genericProperty");
+
+  verifyEnumerable(arguments, "genericProperty");
+
+  verifyConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js
new file mode 100644
index 0000000000..5f5650d942
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-313.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-313
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is generic
+    property, and 'desc' is data descriptor, test 'P' is defined in
+    'O' with all correct attribute values (10.6 [[DefineOwnProperty]]
+    step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: true,
+    enumerable: true,
+    configurable: true
+  });
+  verifyEqualTo(arguments, "genericProperty", 1001);
+
+  verifyWritable(arguments, "genericProperty");
+
+  verifyEnumerable(arguments, "genericProperty");
+
+  verifyConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js
new file mode 100644
index 0000000000..aaa4d6a0fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314-1.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-314-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is property, and 'desc' is
+    accessor descriptor, test 'P' is defined in 'O' with all correct
+    attribute values (10.6 [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc() {
+    return "getFunctionString";
+  }
+
+  function setFunc(value) {
+    this.testgetFunction = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: true,
+    configurable: true
+  });
+  verifyEqualTo(arguments, "genericProperty", getFunc());
+
+  verifyWritable(arguments, "genericProperty", "testgetFunction");
+
+  verifyEnumerable(arguments, "genericProperty");
+
+  verifyConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js
new file mode 100644
index 0000000000..707689d404
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-314.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-314
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is generic
+    property, and 'desc' is accessor descriptor, test 'P' is defined
+    in 'O' with all correct attribute values (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return "getFunctionString";
+  }
+
+  function setFunc(value) {
+    this.testgetFunction = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: true,
+    configurable: true
+  });
+  verifyEqualTo(arguments, "genericProperty", getFunc());
+
+  verifyWritable(arguments, "genericProperty", "testgetFunction");
+
+  verifyEnumerable(arguments, "genericProperty");
+
+  verifyConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js
new file mode 100644
index 0000000000..078b2b0c03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315-1.js
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-315-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own accessor property of 'O',
+    and 'desc' is accessor descriptor, test updating multiple
+    attribute values of 'P' (10.6 [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    get: function() {
+      return 1001;
+    },
+    set: function(value) {
+      this.testgetFunction1 = value;
+    },
+    enumerable: true,
+    configurable: true
+  });
+
+  function getFunc() {
+    return "getFunctionString";
+  }
+
+  function setFunc(value) {
+    this.testgetFunction = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: false,
+    configurable: false
+  });
+  if (c !== 3) {
+    throw new Test262Error('Expected c === 3, actually ' + c);
+  }
+
+  verifyEqualTo(arguments, "genericProperty", getFunc());
+
+  verifyWritable(arguments, "genericProperty", "testgetFunction");
+
+  verifyNotEnumerable(arguments, "genericProperty");
+
+  verifyNotConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js
new file mode 100644
index 0000000000..f9e6b876a8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-315.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-315
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is generic
+    own accessor property of 'O', and 'desc' is accessor descriptor,
+    test updating multiple attribute values of 'P' (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    get: function() {
+      return 1001;
+    },
+    set: function(value) {
+      this.testgetFunction1 = value;
+    },
+    enumerable: true,
+    configurable: true
+  });
+
+  function getFunc() {
+    return "getFunctionString";
+  }
+
+  function setFunc(value) {
+    this.testgetFunction = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    get: getFunc,
+    set: setFunc,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "genericProperty", getFunc());
+
+  verifyWritable(arguments, "genericProperty", "testgetFunction");
+
+  verifyNotEnumerable(arguments, "genericProperty");
+
+  verifyNotConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js
new file mode 100644
index 0000000000..4c18c0b45c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316-1.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-316-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own data property of 'O', and
+    'desc' is data descriptor, test updating multiple attribute values
+    of 'P' (10.6 [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: true,
+    enumerable: true,
+    configurable: true
+  });
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1002,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "genericProperty", 1002);
+
+  verifyWritable(arguments, "genericProperty");
+
+  verifyNotEnumerable(arguments, "genericProperty");
+
+  verifyNotConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js
new file mode 100644
index 0000000000..6683891473
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-316.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-316
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is generic
+    own data property of 'O', and 'desc' is data descriptor, test
+    updating multiple attribute values of 'P' (10.6
+    [[DefineOwnProperty]] step 3)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: true,
+    enumerable: true,
+    configurable: true
+  });
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1002,
+    enumerable: false,
+    configurable: false
+  });
+  verifyEqualTo(arguments, "genericProperty", 1002);
+
+  verifyWritable(arguments, "genericProperty");
+
+  verifyNotEnumerable(arguments, "genericProperty");
+
+  verifyNotConfigurable(arguments, "genericProperty");
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js
new file mode 100644
index 0000000000..be820cbce1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317-1.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-317-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own data property of 'O', test
+    TypeError is thrown when updating the [[Value]] attribute value of
+    'P' which is not writable and not configurable (10.6
+    [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      value: 1002
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (b !== 2) {
+      throw new Test262Error('Expected "b === 2;", actually ' + b);
+    }
+
+    verifyEqualTo(arguments, "genericProperty", 1001);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js
new file mode 100644
index 0000000000..77ca0ba862
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-317.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-317
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is generic
+    own data property of 'O', test TypeError is thrown when updating
+    the [[Value]] attribute value of 'P' which is not writable and not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    value: 1001,
+    writable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      value: 1002
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", 1001);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js
new file mode 100644
index 0000000000..c275772feb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318-1.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-318-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'name' is own data property of 'O',
+    test TypeError is thrown when updating the [[Writable]] attribute
+    value of 'name' which is not configurable (10.6
+    [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    writable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      writable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", undefined);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js
new file mode 100644
index 0000000000..95284091f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-318.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-318
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is
+    generic own data property of 'O', test TypeError is thrown when
+    updating the [[Writable]] attribute value of 'name' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    writable: false,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      writable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", undefined);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js
new file mode 100644
index 0000000000..6f184f8196
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319-1.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-319-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own data property of 'O', test
+    TypeError is thrown when updating the [[Enumerable]] attribute
+    value of 'P' which is not configurable (10.6 [[DefineOwnProperty]]
+    step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", undefined);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js
new file mode 100644
index 0000000000..d4c4c20dc9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-319.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-319
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Enumerable]] attribute value of 'P' which is not configurable
+    (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", undefined);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-32.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-32.js
new file mode 100644
index 0000000000..b50308be75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-32.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-32
+description: >
+    Object.defineProperty - 'name' is an inherited accessor property
+    without a get function (8.12.9 step 1)
+---*/
+
+var proto = {};
+Object.defineProperty(proto, "foo", {
+  set: function() {},
+  configurable: false
+});
+
+var ConstructFun = function() {};
+ConstructFun.prototype = proto;
+var obj = new ConstructFun();
+
+Object.defineProperty(obj, "foo", {
+  configurable: true
+});
+
+assert(obj.hasOwnProperty("foo"), 'obj.hasOwnProperty("foo") !== true');
+assert.sameValue(typeof obj.foo, "undefined", 'typeof obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js
new file mode 100644
index 0000000000..794b689a98
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320-1.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-320-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own data property of 'O', test
+    TypeError is thrown when updating the [[Configurable]] attribute
+    value of 'P' which is not configurable (10.6 [[DefineOwnProperty]]
+    step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  Object.defineProperty(arguments, "genericProperty", {
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", undefined);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js
new file mode 100644
index 0000000000..2d16488d20
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-320.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-320
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is own
+    data property of 'O', test TypeError is thrown when updating the
+    [[Configurable]] attribute value of 'P' which is not configurable
+    (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  Object.defineProperty(arguments, "genericProperty", {
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", undefined);
+
+    verifyNotWritable(arguments, "genericProperty");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js
new file mode 100644
index 0000000000..f0b19aff91
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321-1.js
@@ -0,0 +1,55 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-321-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own accessor property of 'O',
+    test TypeError is thrown when updating the [[Get]] attribute value
+    of 'P' which is not configurable (10.6 [[DefineOwnProperty]] step
+    4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function getFunc() {
+    return "genericPropertyString";
+  }
+
+  function setFunc(value) {
+    this.helpVerifyGet = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    get: getFunc,
+    set: setFunc,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      get: function() {
+        return "overideGenericPropertyString";
+      }
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (a !== 1) {
+      throw new Test262Error('Expected a === 1, actually ' + a);
+    }
+
+    verifyEqualTo(arguments, "genericProperty", getFunc());
+
+    verifyWritable(arguments, "genericProperty", "helpVerifyGet");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js
new file mode 100644
index 0000000000..ce1ebc65ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-321.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-321
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Get]] attribute value of 'P' which is not configurable (10.6
+    [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function getFunc() {
+    return "genericPropertyString";
+  }
+
+  function setFunc(value) {
+    this.helpVerifyGet = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    get: getFunc,
+    set: setFunc,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      get: function() {
+        return "overideGenericPropertyString";
+      }
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyEqualTo(arguments, "genericProperty", getFunc());
+
+    verifyWritable(arguments, "genericProperty", "helpVerifyGet");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js
new file mode 100644
index 0000000000..4261b4980b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322-1.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-322-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own accessor property of 'O',
+    test TypeError is thrown when updating the [[Set]] attribute value
+    of 'P' which is not configurable (10.6 [[DefineOwnProperty]] step
+    4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function setFunc(value) {
+    this.genericPropertyString = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    set: setFunc,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      set: function(value) {
+        this.genericPropertyString1 = value;
+      }
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyWritable(arguments, "genericProperty", "genericPropertyString");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js
new file mode 100644
index 0000000000..9414c90d54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-322.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-322
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Set]] attribute value of 'P' which is not configurable (10.6
+    [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function setFunc(value) {
+    this.genericPropertyString = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    set: setFunc,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      set: function(value) {
+        this.genericPropertyString1 = value;
+      }
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyWritable(arguments, "genericProperty", "genericPropertyString");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js
new file mode 100644
index 0000000000..769c0a8634
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323-1.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-323-1
+description: >
+    Object.defineProperty - ''O' is an Arguments object of a function
+    that has formal parameters, 'P' is own accessor property of 'O',
+    test TypeError is thrown when updating the [[Enumerable]]
+    attribute value of 'P' which is not configurable (10.6
+    [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function setFunc(value) {
+    this.genericPropertyString = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    set: setFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    if (c !== 3) {
+      throw new Test262Error('Expected c === 3, actually ' + c);
+    }
+    verifyWritable(arguments, "genericProperty", "genericPropertyString");
+
+    verifyEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js
new file mode 100644
index 0000000000..a6e17705ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-323.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-323
+description: >
+    Object.defineProperty - ''O' is an Arguments object, 'P' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Enumerable]] attribute value of 'P' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function setFunc(value) {
+    this.genericPropertyString = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    set: setFunc,
+    enumerable: true,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      enumerable: false
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyWritable(arguments, "genericProperty", "genericPropertyString");
+
+    verifyEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js
new file mode 100644
index 0000000000..949102ee2f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324-1.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-324-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object of a function
+    that has formal parameters, 'P' is own accessor property of 'O',
+    test TypeError is thrown when updating the [[Configurable]]
+    attribute value of 'P' which is not configurable (10.6
+    [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function(a, b, c) {
+  function setFunc(value) {
+    this.genericPropertyString = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    set: setFunc,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyWritable(arguments, "genericProperty", "genericPropertyString");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js
new file mode 100644
index 0000000000..bd7e47b2d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-324.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-324
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'P' is own
+    accessor property of 'O', test TypeError is thrown when updating
+    the [[Configurable]] attribute value of 'P' which is not
+    configurable (10.6 [[DefineOwnProperty]] step 4)
+includes: [propertyHelper.js]
+---*/
+
+(function() {
+  function setFunc(value) {
+    this.genericPropertyString = value;
+  }
+  Object.defineProperty(arguments, "genericProperty", {
+    set: setFunc,
+    configurable: false
+  });
+  try {
+    Object.defineProperty(arguments, "genericProperty", {
+      configurable: true
+    });
+    throw new Test262Error("Expected an exception.");
+  } catch (e) {
+    verifyWritable(arguments, "genericProperty", "genericPropertyString");
+
+    verifyNotEnumerable(arguments, "genericProperty");
+
+    verifyNotConfigurable(arguments, "genericProperty");
+
+    if (!(e instanceof TypeError)) {
+      throw new Test262Error("Expected TypeError, got " + e);
+    }
+
+  }
+  false;
+}(1, 2, 3));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-325-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-325-1.js
new file mode 100644
index 0000000000..7fd5606d8d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-325-1.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-325-1
+description: >
+    Object.defineProperty - 'O' is an Arguments object which created
+    with function take formal parameters, 'name' is own property of
+    [[ParameterMap]] of 'O', test 'name' is deleted if 'name' is
+    configurable and 'desc' is accessor descriptor (10.6
+    [[DefineOwnProperty]] step 5.a.i)
+---*/
+
+var argObj = (function(a, b, c) {
+  return arguments;
+})(1, 2, 3);
+var accessed = false;
+
+Object.defineProperty(argObj, 0, {
+  get: function() {
+    accessed = true;
+    return 12;
+  }
+});
+
+assert.sameValue(argObj[0], 12, 'argObj[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-325.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-325.js
new file mode 100644
index 0000000000..52fb06e715
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-325.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-325
+description: >
+    Object.defineProperty - 'O' is an Arguments object, 'name' is own
+    property of [[ParameterMap]] of 'O', test 'name' is deleted if
+    'name' is configurable and 'desc' is accessor descriptor (10.6
+    [[DefineOwnProperty]] step 5.a.i)
+---*/
+
+var argObj = (function() {
+  return arguments;
+})(1, 2, 3);
+var accessed = false;
+
+Object.defineProperty(argObj, 0, {
+  get: function() {
+    accessed = true;
+    return 12;
+  }
+});
+
+assert.sameValue(argObj[0], 12, 'argObj[0]');
+assert(accessed, 'accessed !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-326.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-326.js
new file mode 100644
index 0000000000..7752bd6713
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-326.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-326
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    true, [[Configurable]] is true) is writable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = (obj.prop === 2010);
+obj.prop = 1001;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-327.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-327.js
new file mode 100644
index 0000000000..25b2be0adb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-327.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-327
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    true, [[Configurable]] is true) is enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var property in obj) {
+  if (property === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-328.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-328.js
new file mode 100644
index 0000000000..cd0da76fa7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-328.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-328
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    true, [[Configurable]] is true) is deletable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var beforeDelete = obj.hasOwnProperty("prop");
+delete obj.prop;
+var afterDelete = obj.hasOwnProperty("prop");
+
+assert(beforeDelete, 'beforeDelete !== true');
+assert.sameValue(afterDelete, false, 'afterDelete');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-329.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-329.js
new file mode 100644
index 0000000000..2c4c1556b2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-329.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-329
+description: >
+    ES5 Attributes - success to update [[Writable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is true,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  writable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, true, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, false, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-33.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-33.js
new file mode 100644
index 0000000000..ec1e0bb134
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-33.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-33
+description: >
+    Object.defineProperty - 'O' is a Function object that uses
+    Object's [[GetOwnProperty]] method to access the 'name' property
+    (8.12.9 step 1)
+---*/
+
+var fun = function() {};
+
+Object.defineProperty(fun, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(fun, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(fun.foo, 12, 'fun.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-330.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-330.js
new file mode 100644
index 0000000000..9ec752dcd0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-330.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-330
+description: >
+    ES5 Attributes - success to update [[enumerable]] attribute of
+    data property ([[Writable]] is true, [[Enumerable]] is true,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  enumerable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-331.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-331.js
new file mode 100644
index 0000000000..d486912194
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-331.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-331
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    data property ([[Writable]] is true, [[Enumerable]] is true,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, true, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-332.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-332.js
new file mode 100644
index 0000000000..87c3523276
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-332.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-332
+description: >
+    ES5 Attributes - success to update the data property ([[Writable]]
+    is true, [[Enumerable]] is true, [[Configurable]] is true) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js
new file mode 100644
index 0000000000..b38f669f07
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-1.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-1
+description: >
+    Object.defineProperty will update [[Value]] attribute of named
+    property 'P' successfully when [[Configurable]] attribute is
+    false, [[Writable]] attribute is true and 'O' is an Object object
+    (8.12.9 - step 10)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: true,
+  configurable: false
+});
+
+Object.defineProperty(obj, "property", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "property", 1002);
+
+verifyWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-10.js
new file mode 100644
index 0000000000..5ef66b6e02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-10.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-10
+description: >
+    ES5 Attributes - indexed data property 'P' with attributes
+    [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: false
+    is writable using simple assignment, 'O' is an Arguments object
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var verifyValue = (obj[0] === 2010);
+obj[0] = 1001;
+
+assert(verifyValue, 'verifyValue !== true');
+assert.sameValue(obj[0], 1001, 'obj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-11.js
new file mode 100644
index 0000000000..82b7979a03
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-11.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-11
+description: >
+    ES5 Attributes - indexed property 'P' with attributes
+    [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: false
+    is writable using simple assignment, 'O' is an Arguments object
+---*/
+
+var obj = (function(x) {
+  return arguments;
+}(1001));
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var verifyValue = (obj[0] === 2010);
+
+assert(verifyValue, 'verifyValue !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js
new file mode 100644
index 0000000000..2c7ac9fd07
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-2.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-2
+description: >
+    Object.defineProperty will update [[Value]] attribute of indexed
+    property 'P' successfully when [[Configurable]] attribute is
+    false, [[Writable]] attribute is true and 'A' is an Array object
+    (8.12.9 - step 10)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = [];
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  configurable: false
+});
+
+Object.defineProperty(obj, "0", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "0", 1002);
+
+verifyWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js
new file mode 100644
index 0000000000..214436cb50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-3.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-3
+description: >
+    Object.defineProperty will update [[Value]] attribute of named
+    property 'P' successfully when [[Configurable]] attribute is
+    false, [[Writable]] attribute is true and 'O' is an Arguments
+    object (8.12.9 - step 10)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: true,
+  configurable: false
+});
+
+Object.defineProperty(obj, "property", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "property", 1002);
+
+verifyWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-4.js
new file mode 100644
index 0000000000..22cc6d3969
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-4.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-4
+description: >
+    Indexed property 'P' with attributes [[Writable]]: true,
+    [[Enumerable]]:true, [[Configurable]]:false is writable using
+    simple assignment, 'A' is an Array Object
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var verifyValue = (obj[0] === 2010);
+obj[0] = 1001;
+
+assert(verifyValue, 'verifyValue !== true');
+assert.sameValue(obj[0], 1001, 'obj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-5.js
new file mode 100644
index 0000000000..59bfb0fdc3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-5.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-5
+description: >
+    ES5 Attributes - named data property 'P' with attributes
+    [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: false
+    is writable using simple assignment, 'O' is an Arguments object
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var verifyValue = (obj.prop === 2010);
+obj.prop = 1001;
+
+assert(verifyValue, 'verifyValue !== true');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js
new file mode 100644
index 0000000000..21265866ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-6.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-6
+description: >
+    Object.defineProperty will update [[Value]] attribute of indexed
+    property 'P' successfully when [[Configurable]] attribute is
+    false, [[Writable]] attribute is true and 'O' is an Object object
+    (8.12.9 - step 10)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  configurable: false
+});
+
+Object.defineProperty(obj, "0", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "0", 1002);
+
+verifyWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js
new file mode 100644
index 0000000000..dea755a355
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-7
+description: >
+    Object.defineProperty will update [[Value]] attribute of named
+    property 'P' successfully when [[Configurable]] attribute is
+    false, [[Writable]] attribute is true and 'A' is an Array object
+    (8.12.9 - step 10)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: 1001,
+  writable: true,
+  configurable: false
+});
+
+Object.defineProperty(obj, "prop", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "prop", 1002);
+
+verifyWritable(obj, "prop");
+
+verifyNotEnumerable(obj, "prop");
+
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js
new file mode 100644
index 0000000000..785d0adc99
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-8.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-8
+description: >
+    Object.defineProperty will update [[Value]] attribute of indexed
+    property 'P'successfully when [[Configurable]] attribute is false,
+    [[Writable]] attribute is true and 'O' is an Arguments object
+    (8.12.9 - step 10)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  configurable: false
+});
+
+Object.defineProperty(obj, "0", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "0", 1002);
+
+verifyWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-9.js
new file mode 100644
index 0000000000..3e4826bc68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333-9.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333-9
+description: >
+    Object.defineProperty - Named property 'P' with attributes
+    [[Writable]]: true, [[Enumerable]]:true, [[Configurable]]:false is
+    writable using simple assignment, 'A' is an Array Object
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var verifyValue = (obj.prop === 2010);
+obj.prop = 1001;
+
+assert(verifyValue, 'verifyValue !== true');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333.js
new file mode 100644
index 0000000000..a058a96dfb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-333.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-333
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    true, [[Configurable]] is false) is writable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = (obj.prop === 2010);
+obj.prop = 1001;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-334.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-334.js
new file mode 100644
index 0000000000..9dd1913d57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-334.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-334
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    true, [[Configurable]] is false) is enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js
new file mode 100644
index 0000000000..177a249f90
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-335.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-335
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    true, [[Configurable]] is false) is undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotConfigurable(obj, "prop");
+assert.sameValue(obj.prop, 2010);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-336.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-336.js
new file mode 100644
index 0000000000..1d36f87db1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-336.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-336
+description: >
+    ES5 Attributes - Success to update [[Writable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is true,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  writable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, true, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, false, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-337.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-337.js
new file mode 100644
index 0000000000..6dbfc373e8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-337.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-337
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is true,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: false
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-338.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-338.js
new file mode 100644
index 0000000000..f5895fba7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-338.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-338
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is true,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, false, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-1.js
new file mode 100644
index 0000000000..bbb084c07d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-1.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-339-1
+description: >
+    Object.defineProperty - Updating indexed data property 'P' with
+    attributes [[Writable]]: true, [[Enumerable]]: true,
+    [[Configurable]]: false to an accessor property does not succeed,
+    'A' is an Array object (8.12.9 - step 9.a)
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("0");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "0", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj[0], 2010, 'obj[0]');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-2.js
new file mode 100644
index 0000000000..b03613e1c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-2.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-339-2
+description: >
+    Object.defineProperty - Updating named data property 'P' with
+    attributes [[Writable]]: true, [[Enumerable]]: true,
+    [[Configurable]]: false to an accessor property does not succeed,
+    'O' is an Arguments object (8.12.9 - step 9.a)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-3.js
new file mode 100644
index 0000000000..dd51c78891
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-3.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-339-3
+description: >
+    Object.defineProperty - Updating named data property 'P' with
+    attributes [[Writable]]: true, [[Enumerable]]: true,
+    [[Configurable]]: false to an accessor property does not succeed,
+    'A' is an Array object (8.12.9 - step 9.a)
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-4.js
new file mode 100644
index 0000000000..9d0706c67e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339-4.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-339-4
+description: >
+    Object.defineProperty - Updating indexed data property 'P' with
+    attributes [[Writable]]: true, [[Enumerable]]: true,
+    [[Configurable]]: false to an accessor property does not succeed,
+    'O' is an Arguments object (8.12.9 - step 9.a)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("0");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "0", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj[0], 2010, 'obj[0]');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339.js
new file mode 100644
index 0000000000..5dda522258
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-339.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-339
+description: >
+    ES5 Attributes - fail to update the data property ([[Writable]] is
+    true, [[Enumerable]] is true, [[Configurable]] is false) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-34.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-34.js
new file mode 100644
index 0000000000..75abd1d192
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-34.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-34
+description: >
+    Object.defineProperty - 'O' is an Array object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+---*/
+
+var arrObj = [];
+
+Object.defineProperty(arrObj, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(arrObj, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(arrObj.foo, 12, 'arrObj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-340.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-340.js
new file mode 100644
index 0000000000..1c409533d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-340.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-340
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    false, [[Configurable]] is true) is writable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = (obj.prop === 2010);
+obj.prop = 1001;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-341.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-341.js
new file mode 100644
index 0000000000..5a69176101
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-341.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-341
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    false, [[Configurable]] is true) is non-enumerable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-342.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-342.js
new file mode 100644
index 0000000000..f548201ebe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-342.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-342
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    false, [[Configurable]] is true) is deletable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var beforeDelete = obj.hasOwnProperty("prop");
+delete obj.prop;
+var afterDelete = obj.hasOwnProperty("prop");
+
+assert(beforeDelete, 'beforeDelete !== true');
+assert.sameValue(afterDelete, false, 'afterDelete');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-343.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-343.js
new file mode 100644
index 0000000000..f277f07f73
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-343.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-343
+description: >
+    ES5 Attributes - success to update [[Writable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is false,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  writable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, true, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, false, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-344.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-344.js
new file mode 100644
index 0000000000..6e4242ade1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-344.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-344
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    data property ([[Writable]] is true, [[Enumerable]] is false,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  enumerable: true
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-345.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-345.js
new file mode 100644
index 0000000000..00f26c332b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-345.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-345
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    data property ([[Writable]] is true, [[Enumerable]] is false,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, true, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-346.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-346.js
new file mode 100644
index 0000000000..39bae9dae3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-346.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-346
+description: >
+    ES5 Attributes - success to update the data property ([[Writable]]
+    is true, [[Enumerable]] is false, [[Configurable]] is true) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert(desc2.hasOwnProperty("get"), 'desc2.hasOwnProperty("get") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-347.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-347.js
new file mode 100644
index 0000000000..2f1aef5c38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-347.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-347
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    false, [[Configurable]] is false) is writable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = (obj.prop === 2010);
+obj.prop = 1001;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-348.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-348.js
new file mode 100644
index 0000000000..4aadfec3be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-348.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-348
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    false, [[Configurable]] is false) is non-enumerable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js
new file mode 100644
index 0000000000..143606c7a9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-349.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-349
+description: >
+    ES5 Attributes - property ([[Writable]] is true, [[Enumerable]] is
+    false, [[Configurable]] is false) is undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotConfigurable(obj, "prop");
+assert.sameValue(obj.prop, 2010);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-35.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-35.js
new file mode 100644
index 0000000000..3d3e33d8db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-35.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-35
+description: >
+    Object.defineProperty - 'O' is a String object which implements
+    its own [[GetOwnProperty]] method to access the 'name' property
+    (8.12.9 step 1)
+---*/
+
+var str = new String("abc");
+
+Object.defineProperty(str, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(str, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(str.foo, 12, 'str.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-350.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-350.js
new file mode 100644
index 0000000000..aa7e7bbd32
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-350.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-350
+description: >
+    ES5 Attributes - fail to update [[Writable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is false,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  writable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, true, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, false, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-351.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-351.js
new file mode 100644
index 0000000000..7febca7766
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-351.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-351
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is false,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-352.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-352.js
new file mode 100644
index 0000000000..83ef3294c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-352.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-352
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of data
+    property ([[Writable]] is true, [[Enumerable]] is false,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, false, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-353.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-353.js
new file mode 100644
index 0000000000..3a0ac2fc30
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-353.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-353
+description: >
+    ES5 Attributes - fail to update the data property ([[Writable]] is
+    true, [[Enumerable]] is false, [[Configurable]] is false) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: true,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js
new file mode 100644
index 0000000000..3e580abc51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-1.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-1
+description: >
+    Object.defineProperty will update [[Value]] attribute of named
+    property 'P' successfully when [[Configurable]] attribute is true
+    and [[Writable]] attribute is false, 'O' is an Object object
+    (8.12.9 step - Note)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "property", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "property", 1002);
+
+verifyNotWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js
new file mode 100644
index 0000000000..4fa47d892d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-10.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-10
+description: >
+    Object.defineProperty will update [[Value]] attribute of indexed
+    property 'P' successfully when [[Configurable]] attribute is true
+    and [[Writable]] attribute is false, 'O' is an Object object
+    (8.12.9 step - Note)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "0", 1002);
+
+verifyNotWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js
new file mode 100644
index 0000000000..0f23373bff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-11.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-11
+description: >
+    Object.defineProperty will update [[Value]] attribute of named
+    property 'P' successfully when [[Configurable]] attribute is true
+    and [[Writable]] attribute is false, 'A' is an Array object
+    (8.12.9 step - Note)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: 1001,
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "prop", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "prop", 1002);
+
+verifyNotWritable(obj, "prop");
+
+verifyNotEnumerable(obj, "prop");
+
+verifyConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js
new file mode 100644
index 0000000000..c301667d62
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-12.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-12
+description: >
+    Object.defineProperty will update [[Value]] attribute of indexed
+    property successfully when [[Configurable]] attribute is true and
+    [[Writable]] attribute is false, 'O' is an Arguments object
+    (8.12.9 - step Note)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "0", 1002);
+
+verifyNotWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js
new file mode 100644
index 0000000000..42cf188ef5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-15.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-15
+description: >
+    Object.defineProperty - Named property 'P' with attributes
+    [[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: true
+    is non-writable using simple assignment, 'A' is an Array object
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+
+assert.sameValue(obj.prop, 2010);
+verifyNotWritable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js
new file mode 100644
index 0000000000..b5947a8818
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-16.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-16
+description: >
+    ES5 Attributes - property 'P' is an indexed data property with
+    attributes [[Writable]]: false, [[Enumerable]]: true,
+    [[Configurable]] : true) is non-writable using simple assignment,
+    'O' is an Arguments object
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+
+assert.sameValue(obj[0], 2010);
+verifyNotWritable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js
new file mode 100644
index 0000000000..60ef5a8187
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-2.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-2
+description: >
+    Object.defineProperty will update [[Value]] attribute of indexed
+    property 'P' successfully when [[Configurable]] attribute is true
+    and [[Writable]] attribute is false, 'A' is an Array object
+    (8.12.9 step - Note)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = [];
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "0", 1002);
+
+verifyNotWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js
new file mode 100644
index 0000000000..fecfdd55a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-3.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-3
+description: >
+    Object.defineProperty will update [[Value]] attribute successfully
+    when [[Configurable]] attribute is true and [[Writable]] attribute
+    is false, 'O' is an Arguments object (8.12.9 - step Note)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "property", {
+  value: 1002
+});
+
+verifyEqualTo(obj, "property", 1002);
+
+verifyNotWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js
new file mode 100644
index 0000000000..140bc5b7f7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-6.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-6
+description: >
+    Object.defineProperty - Indexed property 'P' with attributes
+    [[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: true
+    is non-writable using simple assignment, 'A' is an Array object
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+
+assert.sameValue(obj[0], 2010);
+verifyNotWritable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js
new file mode 100644
index 0000000000..31fffa2ee2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354-7.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354-7
+description: >
+    ES5 Attributes - property 'P' with attributes [[Writable]]: false,
+    [[Enumerable]]: true, [[Configurable]] : true) is non-writable
+    using simple assignment, 'O' is an Arguments object
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+
+assert.sameValue(obj.prop, 2010);
+verifyNotWritable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js
new file mode 100644
index 0000000000..dbf15887fb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-354.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-354
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is true, [[Configurable]] is true) is unwritable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+
+assert.sameValue(obj.prop, 2010);
+verifyNotWritable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-355.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-355.js
new file mode 100644
index 0000000000..764432c18f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-355.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-355
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is true, [[Configurable]] is true) is enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var property in obj) {
+  if (property === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-356.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-356.js
new file mode 100644
index 0000000000..fd34047c0e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-356.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-356
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is true, [[Configurable]] is true) is deletable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var beforeDelete = obj.hasOwnProperty("prop");
+delete obj.prop;
+var afterDelete = obj.hasOwnProperty("prop");
+
+assert(beforeDelete, 'beforeDelete !== true');
+assert.sameValue(afterDelete, false, 'afterDelete');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-357.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-357.js
new file mode 100644
index 0000000000..3d760926ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-357.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-357
+description: >
+    ES5 Attributes - success to update [[Writable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is true,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  writable: true
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, false, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, true, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-358.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-358.js
new file mode 100644
index 0000000000..c61f1fe0ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-358.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-358
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    data property ([[Writable]] is false, [[Enumerable]] is true,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  enumerable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-359.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-359.js
new file mode 100644
index 0000000000..d7d587f941
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-359.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-359
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    data property ([[Writable]] is false, [[Enumerable]] is true,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, true, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-36.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-36.js
new file mode 100644
index 0000000000..b9a846fa3e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-36.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-36
+description: >
+    Object.defineProperty - 'O' is a Boolean object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+---*/
+
+var obj = new Boolean(true);
+
+Object.defineProperty(obj, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(obj.foo, 12, 'obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-1.js
new file mode 100644
index 0000000000..0cc765ee6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-1.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-360-1
+description: >
+    ES5 Attributes - Updating indexed data property 'P' whose
+    attributes are [[Writable]]: false, [[Enumerable]]: true,
+    [[Configurable]]: true to an accessor property, 'A' is an Array
+    object (8.12.9 - step 9.b.i)
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "0", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert(desc2.hasOwnProperty("get"), 'desc2.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+assert.sameValue(desc2.configurable, true, 'desc2.configurable');
+assert.sameValue(obj[0], 20, 'obj[0]');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-2.js
new file mode 100644
index 0000000000..f7f96bdc52
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-2.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-360-2
+description: >
+    ES5 Attributes - Updating data property 'P' whose attributes are
+    [[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: true
+    to an accessor property, 'O' is an Arguments object (8.12.9 - step
+    9.b.i)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert(desc2.hasOwnProperty("get"), 'desc2.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+assert.sameValue(desc2.configurable, true, 'desc2.configurable');
+assert.sameValue(obj.prop, 20, 'obj.prop');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-5.js
new file mode 100644
index 0000000000..bcd2213f2c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-5.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-360-5
+description: >
+    ES5 Attributes - Updating named data property 'P' whose attributes
+    are [[Writable]]: false, [[Enumerable]]: true, [[Configurable]]:
+    true to an accessor property, 'A' is an Array object (8.12.9 -
+    step 9.b.i)
+---*/
+
+var obj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert(desc2.hasOwnProperty("get"), 'desc2.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+assert.sameValue(desc2.configurable, true, 'desc2.configurable');
+assert.sameValue(obj.prop, 20, 'obj.prop');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-6.js
new file mode 100644
index 0000000000..96e5b4e3b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360-6.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-360-6
+description: >
+    ES5 Attributes - Updating indexed data property 'P' whose
+    attributes are [[Writable]]: false, [[Enumerable]]: true,
+    [[Configurable]]: true to an accessor property, 'O' is an
+    Arguments object (8.12.9 - step 9.b.i)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+Object.defineProperty(obj, "0", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "0", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert(desc2.hasOwnProperty("get"), 'desc2.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+assert.sameValue(desc2.configurable, true, 'desc2.configurable');
+assert.sameValue(obj[0], 20, 'obj[0]');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360.js
new file mode 100644
index 0000000000..b0975e43e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-360.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-360
+description: >
+    ES5 Attributes - success to update the data property ([[Writable]]
+    is false, [[Enumerable]] is true, [[Configurable]] is true) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert(desc2.hasOwnProperty("get"), 'desc2.hasOwnProperty("get") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js
new file mode 100644
index 0000000000..ddaf657cd8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-361.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-361
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is true, [[Configurable]] is false) is unwritable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+
+assert.sameValue(obj.prop, 2010);
+verifyNotWritable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-362.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-362.js
new file mode 100644
index 0000000000..794aeb4686
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-362.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-362
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is true, [[Configurable]] is false) is enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var property in obj) {
+  if (property === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js
new file mode 100644
index 0000000000..5eb3404f36
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-363.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-363
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is true, [[Configurable]] is false) is undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-364.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-364.js
new file mode 100644
index 0000000000..06b1ec0dfb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-364.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-364
+description: >
+    ES5 Attributes - fail to update [[Writable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is true,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    writable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, false, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, false, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-365.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-365.js
new file mode 100644
index 0000000000..d7fc88a3f1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-365.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-365
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is true,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: false
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-366.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-366.js
new file mode 100644
index 0000000000..606e968895
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-366.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-366
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is true,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, false, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-367.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-367.js
new file mode 100644
index 0000000000..446290d074
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-367.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-367
+description: >
+    ES5 Attributes - fail to update the data property ([[Writable]] is
+    false, [[Enumerable]] is true, [[Configurable]] is false) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: true,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js
new file mode 100644
index 0000000000..1faaa98d37
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-368.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-368
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is false, [[Configurable]] is true) is unwritable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+assert.sameValue(obj.prop, 2010);
+verifyNotWritable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-369.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-369.js
new file mode 100644
index 0000000000..60bfa0086a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-369.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-369
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is false, [[Configurable]] is true) is non-enumerable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-37.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-37.js
new file mode 100644
index 0000000000..fe557c7dac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-37.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-37
+description: >
+    Object.defineProperty - 'O' is a Number object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+---*/
+
+var obj = new Number(-2);
+
+Object.defineProperty(obj, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(obj.foo, 12, 'obj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-370.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-370.js
new file mode 100644
index 0000000000..1b0ad6b0a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-370.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-370
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is false, [[Configurable]] is true) is deletable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var beforeDelete = obj.hasOwnProperty("prop");
+delete obj.prop;
+var afterDelete = obj.hasOwnProperty("prop");
+
+assert(beforeDelete, 'beforeDelete !== true');
+assert.sameValue(afterDelete, false, 'afterDelete');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-371.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-371.js
new file mode 100644
index 0000000000..12585ce6f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-371.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-371
+description: >
+    ES5 Attributes - success to update [[Writable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is false,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  writable: true
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, false, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, true, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-372.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-372.js
new file mode 100644
index 0000000000..2fd3b8b4d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-372.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-372
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    data property ([[Writable]] is false, [[Enumerable]] is false,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  enumerable: true
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-373.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-373.js
new file mode 100644
index 0000000000..9ff4a194e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-373.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-373
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    data property ([[Writable]] is false, [[Enumerable]] is false,
+    [[Configurable]] is true) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, true, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-374.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-374.js
new file mode 100644
index 0000000000..ea1bb48679
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-374.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-374
+description: >
+    ES5 Attributes - success to update the data property ([[Writable]]
+    is false, [[Enumerable]] is false, [[Configurable]] is true) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("value"), 'desc1.hasOwnProperty("value") !== true');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js
new file mode 100644
index 0000000000..b41c9513e2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-375.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-375
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is false, [[Configurable]] is false) is unwritable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+
+assert.sameValue(obj.prop, 2010);
+verifyNotWritable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-376.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-376.js
new file mode 100644
index 0000000000..fa2805314c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-376.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-376
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is false, [[Configurable]] is false) is non-enumerable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js
new file mode 100644
index 0000000000..efd2e54659
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-377.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-377
+description: >
+    ES5 Attributes - property ([[Writable]] is false, [[Enumerable]]
+    is false, [[Configurable]] is false) is undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-378.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-378.js
new file mode 100644
index 0000000000..afde24d570
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-378.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-378
+description: >
+    ES5 Attributes - fail to update [[Writable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is false,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    writable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.writable, false, 'desc1.writable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.writable, false, 'desc2.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-379.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-379.js
new file mode 100644
index 0000000000..cbb72d6f8e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-379.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-379
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is false,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js
new file mode 100644
index 0000000000..f40b4f152a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-38.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-38
+description: >
+    Object.defineProperty - 'O' is the Math object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+includes: [propertyHelper.js]
+---*/
+
+try {
+  Object.defineProperty(Math, "foo", {
+    value: 12,
+    configurable: true
+  });
+
+  verifyEqualTo(Math, "foo", 12);
+
+  verifyNotWritable(Math, "foo");
+
+  verifyNotEnumerable(Math, "foo");
+
+  verifyConfigurable(Math, "foo");
+} finally {
+  delete Math.foo;
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-380.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-380.js
new file mode 100644
index 0000000000..9dde066977
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-380.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-380
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of data
+    property ([[Writable]] is false, [[Enumerable]] is false,
+    [[Configurable]] is false) to different value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.configurable, false, 'desc1.configurable');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc2.configurable, false, 'desc2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-381.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-381.js
new file mode 100644
index 0000000000..2efd739d82
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-381.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-381
+description: >
+    ES5 Attributes - fail to update the data property ([[Writable]] is
+    false, [[Enumerable]] is false, [[Configurable]] is false) to an
+    accessor property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 2010,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+function getFunc() {
+  return 20;
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc1.value, 2010, 'desc1.value');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-382.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-382.js
new file mode 100644
index 0000000000..37efe23714
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-382.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-382
+description: ES5 Attributes - [[Value]] attribute of data property is a number
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+assert.sameValue(desc.value, 1001, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-383.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-383.js
new file mode 100644
index 0000000000..05dc316613
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-383.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-383
+description: ES5 Attributes - [[Value]] attribute of data property is a string
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: "ThisIsAString"
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, "ThisIsAString", 'obj.prop');
+assert.sameValue(desc.value, "ThisIsAString", 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-384.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-384.js
new file mode 100644
index 0000000000..57719e51b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-384.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-384
+description: ES5 Attributes - [[Value]] attribute of data property is a boolean
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: false
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, false, 'obj.prop');
+assert.sameValue(desc.value, false, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-385.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-385.js
new file mode 100644
index 0000000000..dfffe80f88
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-385.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-385
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a generic
+    object
+---*/
+
+var obj = {};
+var tempObj = {
+  testproperty: 100
+};
+
+Object.defineProperty(obj, "prop", {
+  value: tempObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, tempObj, 'obj.prop');
+assert.sameValue(desc.value, tempObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-386.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-386.js
new file mode 100644
index 0000000000..911752dcff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-386.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-386
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is an Array
+    object
+---*/
+
+var obj = {};
+var arrObj = [];
+
+Object.defineProperty(obj, "prop", {
+  value: arrObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, arrObj, 'obj.prop');
+assert.sameValue(desc.value, arrObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-387.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-387.js
new file mode 100644
index 0000000000..45ecb3f669
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-387.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-387
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a String
+    object
+---*/
+
+var obj = {};
+var strObj = new String();
+
+Object.defineProperty(obj, "prop", {
+  value: strObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, strObj, 'obj.prop');
+assert.sameValue(desc.value, strObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-388.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-388.js
new file mode 100644
index 0000000000..bf9546b71a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-388.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-388
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a Number
+    object
+---*/
+
+var obj = {};
+var numObj = new Number();
+
+Object.defineProperty(obj, "prop", {
+  value: numObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, numObj, 'obj.prop');
+assert.sameValue(desc.value, numObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-389.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-389.js
new file mode 100644
index 0000000000..7182ddfb85
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-389.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-389
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a Boolean
+    Object
+---*/
+
+var obj = {};
+var boolObj = new Boolean();
+
+Object.defineProperty(obj, "prop", {
+  value: boolObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, boolObj, 'obj.prop');
+assert.sameValue(desc.value, boolObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-39.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-39.js
new file mode 100644
index 0000000000..4a8721990d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-39.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-39
+description: >
+    Object.defineProperty - 'O' is a Date object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+---*/
+
+var desc = new Date();
+
+Object.defineProperty(desc, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(desc, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(desc.foo, 12, 'desc.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-390.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-390.js
new file mode 100644
index 0000000000..c80f3724bd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-390.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-390
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a
+    Function object
+---*/
+
+var obj = {};
+var funObj = function() {};
+
+Object.defineProperty(obj, "prop", {
+  value: funObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, funObj, 'obj.prop');
+assert.sameValue(desc.value, funObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-391.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-391.js
new file mode 100644
index 0000000000..584e8844af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-391.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-391
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is an Error
+    object
+---*/
+
+var obj = {};
+var errObj = new Error();
+
+Object.defineProperty(obj, "prop", {
+  value: errObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, errObj, 'obj.prop');
+assert.sameValue(desc.value, errObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-392.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-392.js
new file mode 100644
index 0000000000..268812cbc7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-392.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-392
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a Date
+    object
+---*/
+
+var obj = {};
+var dateObj = new Date();
+
+Object.defineProperty(obj, "prop", {
+  value: dateObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, dateObj, 'obj.prop');
+assert.sameValue(desc.value, dateObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-393.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-393.js
new file mode 100644
index 0000000000..5eaa735152
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-393.js
@@ -0,0 +1,23 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-393
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is a RegExp
+    object
+---*/
+
+var obj = {};
+var regObj = new RegExp();
+
+Object.defineProperty(obj, "prop", {
+  value: regObj
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, regObj, 'obj.prop');
+assert.sameValue(desc.value, regObj, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-394.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-394.js
new file mode 100644
index 0000000000..16f70bb333
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-394.js
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-394
+description: ES5 Attributes - [[Value]] attribute of data property is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: undefined
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(typeof obj.prop, "undefined", 'typeof obj.prop');
+assert.sameValue(typeof desc.value, "undefined", 'typeof desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-395.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-395.js
new file mode 100644
index 0000000000..4354960ae5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-395.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-395
+description: ES5 Attributes - [[Value]] attribute of data property is null
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: null
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, null, 'obj.prop');
+assert.sameValue(desc.value, null, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-396.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-396.js
new file mode 100644
index 0000000000..4ad3723e6e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-396.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-396
+description: ES5 Attributes - [[Value]] attribute of data property is NaN
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: NaN
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.prop !== obj.prop, 'obj.prop !== obj.prop !== true');
+assert(desc.value !== desc.value, 'desc.value !== desc.value !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-397.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-397.js
new file mode 100644
index 0000000000..b6d89afb23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-397.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-397
+description: ES5 Attributes - [[Value]] attribute of data property is Infinity
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: Infinity
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, Infinity, 'obj.prop');
+assert.sameValue(desc.value, Infinity, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-398.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-398.js
new file mode 100644
index 0000000000..2665cf01b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-398.js
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-398
+description: ES5 Attributes - [[Value]] attribute of data property is -Infinity
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: -Infinity
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, -Infinity, 'obj.prop');
+assert.sameValue(desc.value, -Infinity, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-399.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-399.js
new file mode 100644
index 0000000000..97c6c7a46e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-399.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-399
+description: >
+    ES5 Attributes - [[Value]] attribute of data property is the
+    global object
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  value: this
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(obj.prop, this, 'obj.prop');
+assert.sameValue(desc.value, this, 'desc.value');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-4.js
new file mode 100644
index 0000000000..80c9d3afd8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-4.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. For newly defined properties, step 4.a.1 of
+    [[DefineOwnProperty]] creates a data property if handed a generic desc.
+es5id: 15.2.3.6-4-4
+description: >
+    Object.defineProperty defines a data property if given a generic
+    desc(8.12.9 step 4.a.i)
+---*/
+
+var o = {};
+
+var desc = {};
+Object.defineProperty(o, "foo", desc);
+
+var propDesc = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(propDesc.value, undefined, 'propDesc.value'); // undefined by default
+assert.sameValue(propDesc.writable, false, 'propDesc.writable'); // false by default
+assert.sameValue(propDesc.enumerable, false, 'propDesc.enumerable'); // false by default
+assert.sameValue(propDesc.configurable, false, 'propDesc.configurable'); // false by default
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-40.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-40.js
new file mode 100644
index 0000000000..7418b9cb59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-40.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-40
+description: >
+    Object.defineProperty - 'O' is a RegExp object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+---*/
+
+var desc = new RegExp();
+
+Object.defineProperty(desc, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(desc, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(desc.foo, 12, 'desc.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-402.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-402.js
new file mode 100644
index 0000000000..f4eac07a1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-402.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-402
+description: >
+    ES5 Attributes - [[Value]] attribute of inherited property of
+    [[Prototype]] internal property is correct (String instance)
+---*/
+
+Object.defineProperty(String.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var strObj = new String();
+
+assert.sameValue(strObj.hasOwnProperty("prop"), false, 'strObj.hasOwnProperty("prop")');
+assert.sameValue(strObj.prop, 1001, 'strObj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-403.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-403.js
new file mode 100644
index 0000000000..f2161ad8dc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-403.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-403
+description: >
+    ES5 Attributes - Successfully add a property to an object when the
+    object's prototype has a property with same name and [[Writable]]
+    attribute is set to true (Array instance)
+---*/
+
+Object.defineProperty(Array.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var arrObj = [];
+arrObj.prop = 1002;
+
+assert(arrObj.hasOwnProperty("prop"), 'arrObj.hasOwnProperty("prop") !== true');
+assert.sameValue(arrObj.prop, 1002, 'arrObj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-404.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-404.js
new file mode 100644
index 0000000000..9726c27754
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-404.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-404
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to true is enumerable (Boolean instance)
+---*/
+
+Object.defineProperty(Boolean.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var boolObj = new Boolean();
+
+var verifyEnumerable = false;
+for (var p in boolObj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(boolObj.hasOwnProperty("prop"), false, 'boolObj.hasOwnProperty("prop")');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-405.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-405.js
new file mode 100644
index 0000000000..d5b183c72c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-405.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-405
+description: >
+    ES5 Attributes - Failed to add a property to an object when the
+    object's object has a property with same name and [[Writable]]
+    attribute is set to false (Number instance)
+includes: [propertyHelper.js]
+---*/
+
+Object.defineProperty(Number.prototype, "prop", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var numObj = new Number();
+
+assert(!numObj.hasOwnProperty("prop"));
+verifyNotWritable(numObj, "prop", "noCheckOwnProp");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-406.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-406.js
new file mode 100644
index 0000000000..78a9e6fef8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-406.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-406
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to false is non-enumerable (Function instance)
+---*/
+
+Object.defineProperty(Function.prototype, "prop", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+var funObj = function() {};
+
+var verifyEnumerable = false;
+for (var p in funObj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(funObj.hasOwnProperty("prop"), false, 'funObj.hasOwnProperty("prop")');
+assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-407.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-407.js
new file mode 100644
index 0000000000..d901d82656
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-407.js
@@ -0,0 +1,22 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-407
+description: >
+    ES5 Attributes - [[Value]] attribute of inherited property of
+    [[Prototype]] internal property is correct (Error Instance)
+---*/
+
+Object.defineProperty(Error.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var errObj = new Error();
+
+assert.sameValue(errObj.hasOwnProperty("prop"), false, 'errObj.hasOwnProperty("prop")');
+assert.sameValue(errObj.prop, 1001, 'errObj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-408.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-408.js
new file mode 100644
index 0000000000..30f7518af8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-408.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-408
+description: >
+    ES5 Attributes - Successfully add a property to an object when the
+    object's prototype has a property with same name and [[Writable]]
+    attribute is set to true (Date instance)
+---*/
+
+Object.defineProperty(Date.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var dateObj = new Date();
+dateObj.prop = 1002;
+
+assert(dateObj.hasOwnProperty("prop"), 'dateObj.hasOwnProperty("prop") !== true');
+assert.sameValue(dateObj.prop, 1002, 'dateObj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-409.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-409.js
new file mode 100644
index 0000000000..16a04628f5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-409.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-409
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to false is enumerable (RegExp instance)
+---*/
+
+Object.defineProperty(RegExp.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+var regObj = new RegExp();
+
+var verifyEnumerable = false;
+for (var p in regObj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(regObj.hasOwnProperty("prop"), false, 'regObj.hasOwnProperty("prop")');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js
new file mode 100644
index 0000000000..e69119a145
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-41.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-41
+description: >
+    Object.defineProperty - 'O' is the JSON object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+includes: [propertyHelper.js]
+---*/
+
+
+Object.defineProperty(JSON, "foo", {
+  value: 12,
+  configurable: true
+});
+
+verifyEqualTo(JSON, "foo", 12);
+
+verifyNotWritable(JSON, "foo");
+
+verifyNotEnumerable(JSON, "foo");
+
+verifyConfigurable(JSON, "foo");
+
+delete JSON.foo;
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-410.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-410.js
new file mode 100644
index 0000000000..7d7d0aa713
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-410.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-410
+description: >
+    ES5 Attributes - Failed to add a property to an object when the
+    object's prototype has a property with the same name and
+    [[Writable]] set to false (JSON)
+includes: [propertyHelper.js]
+---*/
+
+Object.defineProperty(Object.prototype, "prop", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+assert(!JSON.hasOwnProperty("prop"));
+verifyNotWritable(JSON, "prop", "noCheckOwnProp");
+assert.sameValue(JSON.prop, 1001);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-411.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-411.js
new file mode 100644
index 0000000000..20e5a656c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-411.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-411
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to false is non-enumerable (Math)
+---*/
+
+Object.defineProperty(Object.prototype, "prop", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var verifyEnumerable = false;
+for (var p in Math) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(Math.hasOwnProperty("prop"), false, 'Math.hasOwnProperty("prop")');
+assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-412.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-412.js
new file mode 100644
index 0000000000..337eb067c1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-412.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-412
+description: >
+    ES5 Attributes - [[Value]] field of inherited property of
+    [[Prototype]] internal property is correct(Object.create)
+---*/
+
+var appointment = {};
+
+Object.defineProperty(appointment, "startTime", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+Object.defineProperty(appointment, "name", {
+  value: "NAME",
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+Object.defineProperty(meeting, "conferenceCall", {
+  value: "In-person meeting",
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var teamMeeting = Object.create(meeting);
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty('conferenceCall');
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert.sameValue(teamMeeting.name, "NAME", 'teamMeeting.name');
+assert.sameValue(teamMeeting.startTime, 1001, 'teamMeeting.startTime');
+assert.sameValue(teamMeeting.conferenceCall, "In-person meeting", 'teamMeeting.conferenceCall');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-413.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-413.js
new file mode 100644
index 0000000000..f801ed76af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-413.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-413
+description: >
+    ES5 Attributes - Successfully add a property to an object when the
+    object's prototype has a property with the same name and
+    [[Writable]] set to true (Object.create)
+---*/
+
+var appointment = {};
+
+Object.defineProperty(appointment, "startTime", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+Object.defineProperty(appointment, "name", {
+  value: "NAME",
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+Object.defineProperty(meeting, "conferenceCall", {
+  value: "In-person meeting",
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var teamMeeting = Object.create(meeting);
+teamMeeting.name = "Team Meeting";
+var dateObj = new Date("10/31/2010 08:00");
+teamMeeting.startTime = dateObj;
+teamMeeting.conferenceCall = "4255551212";
+
+var hasOwnProperty = teamMeeting.hasOwnProperty("name") &&
+  teamMeeting.hasOwnProperty("startTime") &&
+  teamMeeting.hasOwnProperty('conferenceCall');
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert.sameValue(teamMeeting.name, "Team Meeting", 'teamMeeting.name');
+assert.sameValue(teamMeeting.startTime, dateObj, 'teamMeeting.startTime');
+assert.sameValue(teamMeeting.conferenceCall, "4255551212", 'teamMeeting.conferenceCall');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-414.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-414.js
new file mode 100644
index 0000000000..945ecf7f1e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-414.js
@@ -0,0 +1,60 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-414
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to true is enumerable (Object.create)
+---*/
+
+var appointment = new Object();
+
+Object.defineProperty(appointment, "startTime", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+Object.defineProperty(appointment, "name", {
+  value: "NAME",
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+Object.defineProperty(meeting, "conferenceCall", {
+  value: "In-person meeting",
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var teamMeeting = Object.create(meeting);
+
+var verifyTimeProp = false;
+var verifyNameProp = false;
+var verifyCallProp = false;
+for (var p in teamMeeting) {
+  if (p === "startTime") {
+    verifyTimeProp = true;
+  }
+  if (p === "name") {
+    verifyNameProp = true;
+  }
+  if (p === "conferenceCall") {
+    verifyCallProp = true;
+  }
+}
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty("conferenceCall");
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert(verifyTimeProp, 'verifyTimeProp !== true');
+assert(verifyNameProp, 'verifyNameProp !== true');
+assert(verifyCallProp, 'verifyCallProp !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-415.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-415.js
new file mode 100644
index 0000000000..00559f4a49
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-415.js
@@ -0,0 +1,56 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-415
+description: >
+    ES5 Attributes - Failed to add properties to an object when the
+    object's prototype has properties with the same name and
+    [[Writable]] set to false (Object.create)
+includes: [propertyHelper.js]
+---*/
+
+var appointment = new Object();
+
+Object.defineProperty(appointment, "startTime", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+Object.defineProperty(appointment, "name", {
+  value: "NAME",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+Object.defineProperty(meeting, "conferenceCall", {
+  value: "In-person meeting",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var teamMeeting = Object.create(meeting);
+
+//teamMeeting.name = "Team Meeting";
+verifyNotWritable(teamMeeting, "name", "noCheckOwnProp");
+
+var dateObj = new Date("10/31/2010 08:00");
+//teamMeeting.startTime = dateObj;
+verifyNotWritable(teamMeeting, "startTime", "noCheckOwnProp");
+
+//teamMeeting.conferenceCall = "4255551212";
+verifyNotWritable(teamMeeting, "conferenceCall", "noCheckOwnProp");
+
+assert(!teamMeeting.hasOwnProperty("name"));
+assert(!teamMeeting.hasOwnProperty("startTime"));
+assert(!teamMeeting.hasOwnProperty('conferenceCall'));
+
+assert.sameValue(teamMeeting.name, "NAME");
+assert.sameValue(teamMeeting.startTime, 1001);
+assert.sameValue(teamMeeting.conferenceCall, "In-person meeting");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-416.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-416.js
new file mode 100644
index 0000000000..4f805ea994
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-416.js
@@ -0,0 +1,60 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-416
+description: >
+    ES5 Attributes - Inherited properties whose [[Enumerable]]
+    attribute is set to false is non-enumerable (Object.create)
+---*/
+
+var appointment = {};
+
+Object.defineProperty(appointment, "startTime", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+Object.defineProperty(appointment, "name", {
+  value: "NAME",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+Object.defineProperty(meeting, "conferenceCall", {
+  value: "In-person meeting",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var teamMeeting = Object.create(meeting);
+
+var verifyTimeProp = false;
+var verifyNameProp = false;
+var verifyCallProp = false;
+for (var p in teamMeeting) {
+  if (p === "startTime") {
+    verifyTimeProp = true;
+  }
+  if (p === "name") {
+    verifyNameProp = true;
+  }
+  if (p === "conferenceCall") {
+    verifyCallProp = true;
+  }
+}
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty("conferenceCall");
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert.sameValue(verifyTimeProp, false, 'verifyTimeProp');
+assert.sameValue(verifyNameProp, false, 'verifyNameProp');
+assert.sameValue(verifyCallProp, false, 'verifyCallProp');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-417.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-417.js
new file mode 100644
index 0000000000..d80d9e5536
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-417.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-417
+description: >
+    ES5 Attributes - [[Value]] attribute of inherited property of
+    [[Prototype]] internal property is correct(Function.prototype.bind)
+---*/
+
+var foo = function() {};
+
+Object.defineProperty(Function.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var obj = foo.bind({});
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-418.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-418.js
new file mode 100644
index 0000000000..903bcd610c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-418.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-418
+description: >
+    ES5 Attributes - Successfully add a property to an object when the
+    object's prototype has a property with the same name and
+    [[Writable]] set to true (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+
+Object.defineProperty(Function.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var obj = foo.bind({});
+obj.prop = 1002;
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(obj.prop, 1002, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-419.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-419.js
new file mode 100644
index 0000000000..f952af15d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-419.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-419
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to true is enumerable (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+
+Object.defineProperty(Function.prototype, "prop", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+var obj = foo.bind({});
+var verifyEnumerable = false;
+for (var p in obj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-42.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-42.js
new file mode 100644
index 0000000000..194bc8cbeb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-42.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-42
+description: >
+    Object.defineProperty - 'O' is an Error object that uses Object's
+    [[GetOwnProperty]] method to access the 'name' property (8.12.9
+    step 1)
+---*/
+
+var desc = new Error();
+
+Object.defineProperty(desc, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(desc, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(desc.foo, 12, 'desc.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-420.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-420.js
new file mode 100644
index 0000000000..0fe1d6bd55
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-420.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-420
+description: >
+    ES5 Attributes - Failed to add a property to an object when the
+    object's prototype has a property with the same name and
+    [[Writable]] set to false(Function.prototype.bind)
+includes: [propertyHelper.js]
+---*/
+
+var foo = function() {};
+
+Object.defineProperty(Function.prototype, "prop", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var obj = foo.bind({});
+assert(!obj.hasOwnProperty("prop"));
+verifyNotWritable(foo, "prop", "noCheckOwnProp");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-421.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-421.js
new file mode 100644
index 0000000000..e6da6e0502
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-421.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-421
+description: >
+    ES5 Attributes - Inherited property whose [[Enumerable]] attribute
+    is set to false is non-enumerable (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+
+Object.defineProperty(Function.prototype, "prop", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+var obj = foo.bind({});
+var verifyEnumerable = false;
+for (var p in obj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-422.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-422.js
new file mode 100644
index 0000000000..f03715acec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-422.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-422
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-423.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-423.js
new file mode 100644
index 0000000000..93bb685cb7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-423.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-423
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-424.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-424.js
new file mode 100644
index 0000000000..6b6b262c6f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-424.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-424
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is true) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-425.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-425.js
new file mode 100644
index 0000000000..643211086a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-425.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-425
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-426.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-426.js
new file mode 100644
index 0000000000..fa65a961d3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-426.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-426
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-427.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-427.js
new file mode 100644
index 0000000000..a5310d9f12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-427.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-427
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-428.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-428.js
new file mode 100644
index 0000000000..98084ff284
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-428.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-428
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: false
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js
new file mode 100644
index 0000000000..1484ccd385
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-429.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-429
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+verifyNotConfigurable(obj, "prop");
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-43.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-43.js
new file mode 100644
index 0000000000..2220be851e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-43.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-43
+description: >
+    Object.defineProperty - 'O' is an Arguments object which
+    implements its own [[GetOwnProperty]] method to access the 'name'
+    property (8.12.9 step 1)
+---*/
+
+var argObj = (function() {
+  return arguments;
+})();
+
+Object.defineProperty(argObj, "foo", {
+  value: 12,
+  configurable: false
+});
+assert.throws(TypeError, function() {
+  Object.defineProperty(argObj, "foo", {
+    value: 11,
+    configurable: true
+  });
+});
+assert.sameValue(argObj.foo, 12, 'argObj.foo');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-430.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-430.js
new file mode 100644
index 0000000000..d2260d4c56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-430.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-430
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-431.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-431.js
new file mode 100644
index 0000000000..da5a96c214
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-431.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-431
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-432.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-432.js
new file mode 100644
index 0000000000..fc0e43f328
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-432.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-432
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-433.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-433.js
new file mode 100644
index 0000000000..57c7e9f6d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-433.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-433
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is false) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js
new file mode 100644
index 0000000000..0c278f09b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-434.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-434
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-435.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-435.js
new file mode 100644
index 0000000000..f3068b86f0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-435.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-435
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-436.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-436.js
new file mode 100644
index 0000000000..f7620105c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-436.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-436
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: setFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-437.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-437.js
new file mode 100644
index 0000000000..f9336196bc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-437.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-437
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: false
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js
new file mode 100644
index 0000000000..ccf6b3d0aa
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-438.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-438
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  assert.sameValue(desc1.configurable, false);
+  assert.sameValue(desc2.configurable, false);
+
+  verifyNotConfigurable(obj, "prop");
+
+  assert(obj.hasOwnProperty("prop"));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-439.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-439.js
new file mode 100644
index 0000000000..71cd1da584
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-439.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-439
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    undefined, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-440.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-440.js
new file mode 100644
index 0000000000..97b98b0c39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-440.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-440
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-441.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-441.js
new file mode 100644
index 0000000000..a4495cc980
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-441.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-441
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-442.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-442.js
new file mode 100644
index 0000000000..c9eb02984f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-442.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-442
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is true) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-443.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-443.js
new file mode 100644
index 0000000000..28d39c1995
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-443.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-443
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-444.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-444.js
new file mode 100644
index 0000000000..2c637ffcdb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-444.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-444
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-445.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-445.js
new file mode 100644
index 0000000000..e570581612
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-445.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-445
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+
+obj.prop = "overrideData";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-446.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-446.js
new file mode 100644
index 0000000000..944fd5226f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-446.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-446
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: true
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js
new file mode 100644
index 0000000000..e7580caeb2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-447.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-447
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-448.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-448.js
new file mode 100644
index 0000000000..b3e27acfc4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-448.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-448
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-449.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-449.js
new file mode 100644
index 0000000000..3949afee2b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-449.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-449
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js
new file mode 100644
index 0000000000..65701f6c78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-45.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-45
+description: >
+    Object.defineProperty - 'O' is the global object that uses
+    Object's [[GetOwnProperty]] method to access the 'name' property
+    (8.12.9 step 1)
+includes: [propertyHelper.js]
+---*/
+
+Object.defineProperty(this, "foo", {
+  value: 12,
+  configurable: true
+});
+
+verifyEqualTo(this, "foo", 12);
+
+verifyNotWritable(this, "foo");
+
+verifyNotEnumerable(this, "foo");
+
+verifyConfigurable(this, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-450.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-450.js
new file mode 100644
index 0000000000..3ccbac0cab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-450.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-450
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-451.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-451.js
new file mode 100644
index 0000000000..ac6f1cada0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-451.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-451
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is false) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js
new file mode 100644
index 0000000000..d099d78495
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-452.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-452
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-453.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-453.js
new file mode 100644
index 0000000000..27c637f5b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-453.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-453
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-454.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-454.js
new file mode 100644
index 0000000000..5a0ef65a4f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-454.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-454
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: setFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-455.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-455.js
new file mode 100644
index 0000000000..9d66f0ac7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-455.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-455
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: true
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js
new file mode 100644
index 0000000000..da9397f14d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-456.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-456
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  assert.sameValue(desc1.configurable, false);
+  assert.sameValue(desc2.configurable, false);
+
+  verifyNotConfigurable(obj, "prop");
+
+  assert(obj.hasOwnProperty("prop"));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-457.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-457.js
new file mode 100644
index 0000000000..e731f2415e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-457.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-457
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    undefined, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-458.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-458.js
new file mode 100644
index 0000000000..94f200aa09
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-458.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-458
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-459.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-459.js
new file mode 100644
index 0000000000..cb36fd924b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-459.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-459
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-46.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-46.js
new file mode 100644
index 0000000000..118d1e3aa7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-46.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-46
+description: >
+    Object.defineProperty - 'name' is defined as data property if
+    'name' property doesn't exist in 'O' and 'desc' is generic
+    descriptor (8.12.9 step 4.a)
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  enumerable: true
+});
+
+var isEnumerable = false;
+for (var item in obj) {
+  if (obj.hasOwnProperty(item) && item === "property") {
+    isEnumerable = true;
+  }
+}
+
+assert(obj.hasOwnProperty("property"), 'obj.hasOwnProperty("property") !== true');
+assert(isEnumerable, 'isEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-460.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-460.js
new file mode 100644
index 0000000000..d7245811e0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-460.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-460
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is true) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-461.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-461.js
new file mode 100644
index 0000000000..d7ef8ccb29
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-461.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-461
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-462.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-462.js
new file mode 100644
index 0000000000..fbca9ced97
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-462.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-462
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-463.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-463.js
new file mode 100644
index 0000000000..5dd3a15b54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-463.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-463
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  set: undefined
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-464.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-464.js
new file mode 100644
index 0000000000..28c41b7b0f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-464.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-464
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: false
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js
new file mode 100644
index 0000000000..6ff40b2cc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-465.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-465
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-466.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-466.js
new file mode 100644
index 0000000000..b8a679e7c0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-466.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-466
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-467.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-467.js
new file mode 100644
index 0000000000..28c68afe75
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-467.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-467
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-468.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-468.js
new file mode 100644
index 0000000000..0eb09dac55
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-468.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-468
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-469.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-469.js
new file mode 100644
index 0000000000..46f2175924
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-469.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-469
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is false) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js
new file mode 100644
index 0000000000..4b8fd1bf7f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-47.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-47
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O',
+    [[Value]] of 'name' property is set as undefined if it is absent
+    in data descriptor 'desc' (8.12.9 step 4.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  writable: true,
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(obj, "property", undefined);
+
+verifyWritable(obj, "property");
+
+verifyEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js
new file mode 100644
index 0000000000..39b025006b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-470.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-470
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+verifyNotWritable(obj, "prop");
+verifyNotConfigurable(obj, "prop");
+
+assert.sameValue(desc.configurable, false);
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-471.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-471.js
new file mode 100644
index 0000000000..f3373dc3e6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-471.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-471
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-472.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-472.js
new file mode 100644
index 0000000000..53788647fe
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-472.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-472
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: undefined
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-473.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-473.js
new file mode 100644
index 0000000000..0e1914d48d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-473.js
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-473
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: false
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js
new file mode 100644
index 0000000000..ce3fa250dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-474.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-474
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  assert.sameValue(desc1.configurable, false);
+  assert.sameValue(desc2.configurable, false);
+
+  verifyNotConfigurable(obj, "prop");
+
+  assert(obj.hasOwnProperty("prop"));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-475.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-475.js
new file mode 100644
index 0000000000..50e7f6a007
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-475.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-475
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    undefined, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-476.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-476.js
new file mode 100644
index 0000000000..f30f03e397
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-476.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-476
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-477.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-477.js
new file mode 100644
index 0000000000..d44370130c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-477.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-477
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-478.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-478.js
new file mode 100644
index 0000000000..9677d58ef1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-478.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-478
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is true) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-479.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-479.js
new file mode 100644
index 0000000000..fddbd21f2d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-479.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-479
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js
new file mode 100644
index 0000000000..1dcf25ea46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-48.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-48
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Writable]] of 'name' property of 'Attributes' is set as false
+    value if absent in data descriptor 'desc' (8.12.9 step 4.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(obj, "property", 1001);
+
+verifyNotWritable(obj, "property");
+
+verifyEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-480.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-480.js
new file mode 100644
index 0000000000..c488ae9a2c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-480.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-480
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-481.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-481.js
new file mode 100644
index 0000000000..fe8c7eba0b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-481.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-481
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  set: undefined
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-482.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-482.js
new file mode 100644
index 0000000000..db87e9a238
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-482.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-482
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: true
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js
new file mode 100644
index 0000000000..118a8aac10
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-483.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-483
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-484.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-484.js
new file mode 100644
index 0000000000..54c080d470
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-484.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-484
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-485.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-485.js
new file mode 100644
index 0000000000..ba7c8b29db
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-485.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-485
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.get, "undefined", 'typeof desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-486.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-486.js
new file mode 100644
index 0000000000..6ea9594ad3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-486.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-486
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is undefined, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-487.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-487.js
new file mode 100644
index 0000000000..a5b5b747fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-487.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-487
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is false) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js
new file mode 100644
index 0000000000..0785a3996e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-488.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-488
+description: >
+    ES5 Attributes - property ([[Get]] is undefined, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+verifyNotConfigurable(obj, "prop");
+assert.sameValue(desc.configurable, false);
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-489.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-489.js
new file mode 100644
index 0000000000..3218db8fa3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-489.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-489
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var result1 = typeof obj.prop === "undefined";
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: getFunc
+  });
+});
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(typeof desc1.get, "undefined", 'typeof desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js
new file mode 100644
index 0000000000..9e45eed271
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-49.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-49
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Enumerable]] of 'name' property of 'Attributes' is set as false
+    value if absent in data descriptor 'desc' (8.12.9 step 4.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: true,
+  configurable: true
+});
+verifyEqualTo(obj, "property", 1001);
+
+verifyWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-490.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-490.js
new file mode 100644
index 0000000000..80ac582365
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-490.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-490
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: undefined
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-491.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-491.js
new file mode 100644
index 0000000000..4af44ec230
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-491.js
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-491
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: true
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js
new file mode 100644
index 0000000000..cc418c9e12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-492.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-492
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is undefined, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  verifyNotConfigurable(obj, "prop");
+
+  assert.sameValue(desc1.configurable, false);
+  assert.sameValue(desc2.configurable, false);
+
+  assert(obj.hasOwnProperty("prop"));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-493.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-493.js
new file mode 100644
index 0000000000..112765a427
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-493.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-493
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    undefined, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: undefined,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-494.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-494.js
new file mode 100644
index 0000000000..360d5f2ebd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-494.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-494
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-495.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-495.js
new file mode 100644
index 0000000000..918c7134e9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-495.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-495
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-496.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-496.js
new file mode 100644
index 0000000000..34c390b261
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-496.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-496
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is true) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-497.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-497.js
new file mode 100644
index 0000000000..940c9f151d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-497.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-497
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-498.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-498.js
new file mode 100644
index 0000000000..7e994758bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-498.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-498
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: undefined
+});
+
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-499.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-499.js
new file mode 100644
index 0000000000..d25a75aadf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-499.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-499
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+obj.prop = "overrideData";
+
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-5.js
new file mode 100644
index 0000000000..e496ca8ccb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-5.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 6 of [[DefineOwnProperty]] returns if
+    every field of desc also occurs in current and every field in desc has
+    the same value as current.
+es5id: 15.2.3.6-4-5
+description: >
+    Object.defineProperty is no-op if current and desc are the same
+    data desc
+---*/
+
+function sameDataDescriptorValues(d1, d2) {
+  return (d1.value === d2.value &&
+    d1.enumerable === d2.enumerable &&
+    d1.writable === d2.writable &&
+    d1.configurable === d2.configurable);
+}
+
+var o = {};
+
+// create a data valued property with the following attributes:
+// value: 101, enumerable: true, writable: true, configurable: true
+o["foo"] = 101;
+
+// query for, and save, the desc. A subsequent call to defineProperty
+// with the same desc should not disturb the property definition.
+var d1 = Object.getOwnPropertyDescriptor(o, "foo");
+
+// now, redefine the property with the same descriptor
+// the property defintion should not get disturbed.
+var desc = {
+  value: 101,
+  enumerable: true,
+  writable: true,
+  configurable: true
+};
+Object.defineProperty(o, "foo", desc);
+
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(sameDataDescriptorValues(d1, d2), true, 'sameDataDescriptorValues(d1, d2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js
new file mode 100644
index 0000000000..f49f61a6c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-50.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-50
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Configurable]] of 'name' property is set as false if it is
+    absent in data descriptor 'desc' (8.12.9 step 4.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: true,
+  enumerable: true
+});
+verifyEqualTo(obj, "property", 1001);
+
+verifyWritable(obj, "property");
+
+verifyEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-500.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-500.js
new file mode 100644
index 0000000000..ba380b5576
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-500.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-500
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is  Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: false
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js
new file mode 100644
index 0000000000..7de38b5055
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-501.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-501
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+
+verifyNotWritable(obj, "prop");
+verifyNotConfigurable(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-502.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-502.js
new file mode 100644
index 0000000000..211bf9ad56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-502.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-502
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-503.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-503.js
new file mode 100644
index 0000000000..cc69b7f31a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-503.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-503
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-504.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-504.js
new file mode 100644
index 0000000000..e8eac02cab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-504.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-504
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-505.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-505.js
new file mode 100644
index 0000000000..b1fe46024e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-505.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-505
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is false) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js
new file mode 100644
index 0000000000..8ad6ca3b7c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-506.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-506
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is true, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-507.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-507.js
new file mode 100644
index 0000000000..d15be1da71
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-507.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-507
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: undefined
+  });
+});
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-508.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-508.js
new file mode 100644
index 0000000000..70b835ea7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-508.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-508
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: setFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-509.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-509.js
new file mode 100644
index 0000000000..f1fef2a928
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-509.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-509
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: false
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js
new file mode 100644
index 0000000000..989d71d164
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-51.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-51
+description: >
+    Object.defineProperty - desc is data descriptor, test updating all
+    attribute values of 'name' (8.12.9 step 4.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {
+  "property": 1
+}; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "property", {
+  value: 1001,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(obj, "property", 1001);
+
+verifyNotWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js
new file mode 100644
index 0000000000..325f76e16c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-510.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-510
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  assert.sameValue(desc1.configurable, false);
+  assert.sameValue(desc2.configurable, false);
+
+  verifyNotConfigurable(obj, "prop");
+
+  assert(obj.hasOwnProperty("prop"));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-511.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-511.js
new file mode 100644
index 0000000000..75032f7168
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-511.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-511
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    a Function, [[Set]] is undefined, [[Enumerable]] is true,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-512.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-512.js
new file mode 100644
index 0000000000..5f624b3b7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-512.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-512
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-513.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-513.js
new file mode 100644
index 0000000000..0645884c5d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-513.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-513
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is true) is undefined
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-514.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-514.js
new file mode 100644
index 0000000000..1c4ca0a01f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-514.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-514
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is true) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-515.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-515.js
new file mode 100644
index 0000000000..7b40d7f6ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-515.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-515
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-516.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-516.js
new file mode 100644
index 0000000000..626a28836d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-516.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-516
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: undefined
+});
+
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-517.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-517.js
new file mode 100644
index 0000000000..3181e0c083
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-517.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-517
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+
+obj.prop = "overrideData";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-518.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-518.js
new file mode 100644
index 0000000000..f616aa5e18
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-518.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-518
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: true
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js
new file mode 100644
index 0000000000..60baf731ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-519.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-519
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js
new file mode 100644
index 0000000000..0d2ca8420a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-52.js
@@ -0,0 +1,25 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-52
+description: >
+    Object.defineProperty - 'desc' is generic descriptor without any
+    attribute, test 'name' is defined in 'obj' with all default
+    attribute values (8.12.9 step 4.a.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {});
+
+verifyEqualTo(obj, "property", undefined);
+
+verifyNotWritable(obj, "property");
+
+verifyNotEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-520.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-520.js
new file mode 100644
index 0000000000..94ae4a9ff9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-520.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-520
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-521.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-521.js
new file mode 100644
index 0000000000..5594c922b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-521.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-521
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-522.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-522.js
new file mode 100644
index 0000000000..78a8f4ef45
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-522.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-522
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is false) is undefined
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(typeof desc.set, "undefined", 'typeof desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-523.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-523.js
new file mode 100644
index 0000000000..f7f9481f39
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-523.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-523
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is false) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js
new file mode 100644
index 0000000000..aa6fe43c25
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-524.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-524
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is
+    undefined, [[Enumerable]] is false, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc.configurable, false);
+
+verifyNotConfigurable(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-525.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-525.js
new file mode 100644
index 0000000000..8fd9cb53a4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-525.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-525
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: undefined
+  });
+});
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-526.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-526.js
new file mode 100644
index 0000000000..0ae0120d5f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-526.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-526
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: setFunc
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(typeof desc1.set, "undefined", 'typeof desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-527.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-527.js
new file mode 100644
index 0000000000..609fe03607
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-527.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-527
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: true
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js
new file mode 100644
index 0000000000..b666822536
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-528.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-528
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is undefined,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  assert.sameValue(desc1.configurable, false);
+  assert.sameValue(desc2.configurable, false);
+
+  verifyNotConfigurable(obj, "prop");
+
+  assert(obj.hasOwnProperty("prop"));
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-529.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-529.js
new file mode 100644
index 0000000000..15ef13d55e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-529.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-529
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    a Function, [[Set]] is undefined, [[Enumerable]] is false,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: undefined,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js
new file mode 100644
index 0000000000..b8dd34d5ab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-53.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-53
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Get]] of 'name' property is set as undefined if it is absent in
+    accessor descriptor 'desc' (8.12.9 step 4.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+var setFunc = function(value) {
+  obj.setVerifyHelpProp = value;
+};
+
+Object.defineProperty(obj, "property", {
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+verifyWritable(obj, "property", "setVerifyHelpProp");
+
+verifyEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-530.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-530.js
new file mode 100644
index 0000000000..308414e971
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-530.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-530
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js
new file mode 100644
index 0000000000..167099fb52
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-1.js
@@ -0,0 +1,47 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-1
+description: >
+    Object.defineProperty will update [[Get]] and [[Set]] attributes
+    of named accessor property 'P' successfully when [[Configurable]]
+    attribute is true, 'O' is an Object object (8.12.9 step 11)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return obj.verifySetFunction;
+  },
+  set: function(value) {
+    obj.verifySetFunction = value;
+  },
+  configurable: true
+});
+
+obj.verifySetFunction1 = "data1";
+var getFunc = function() {
+  return obj.verifySetFunction1;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction1 = value;
+};
+
+Object.defineProperty(obj, "property", {
+  get: getFunc,
+  set: setFunc
+});
+
+verifyEqualTo(obj, "property", getFunc());
+
+verifyWritable(obj, "property", "verifySetFunction1");
+
+verifyNotEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js
new file mode 100644
index 0000000000..50dbf751f4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-10.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-10
+description: >
+    Object.defineProperty will update [[Get]] and [[Set]] attributes
+    of indexed accessor property 'P' successfully when
+    [[Configurable]] attribute is true, 'O' is an Object object
+    (8.12.9 step 11)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+obj.verifySetFunction = "data";
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return obj.verifySetFunction;
+  },
+  set: function(value) {
+    obj.verifySetFunction = value;
+  },
+  configurable: true
+});
+
+obj.verifySetFunction1 = "data1";
+var getFunc = function() {
+  return obj.verifySetFunction1;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction1 = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc
+});
+
+verifyEqualTo(obj, "0", getFunc());
+
+verifyWritable(obj, "0", "verifySetFunction1");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js
new file mode 100644
index 0000000000..d23dfcde09
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-11.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-11
+description: >
+    Object.defineProperty will update [[Get]] and [[Set]] attributes
+    of named accessor property 'P' successfully when [[Configurable]]
+    attribute is true, 'A' is an Array object (8.12.9 step 11)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = [];
+
+obj.verifySetFunction = "data";
+Object.defineProperty(obj, "prop", {
+  get: function() {
+    return obj.verifySetFunction;
+  },
+  set: function(value) {
+    obj.verifySetFunction = value;
+  },
+  configurable: true
+});
+
+obj.verifySetFunction1 = "data1";
+var getFunc = function() {
+  return obj.verifySetFunction1;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction1 = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc
+});
+
+verifyEqualTo(obj, "prop", getFunc());
+
+verifyWritable(obj, "prop", "verifySetFunction1");
+
+verifyNotEnumerable(obj, "prop");
+
+verifyConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js
new file mode 100644
index 0000000000..05a7954bab
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-12.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-12
+description: >
+    Object.defineProperty will update [[Get]] and [[Set]] attributes
+    of indexed accessor property successfully when [[Configurable]]
+    attribute is true, 'O' is an Arguments object (8.12.9 step 11)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunction = "data";
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return obj.verifySetFunction;
+  },
+  set: function(value) {
+    obj.verifySetFunction = value;
+  },
+  configurable: true
+});
+
+obj.verifySetFunction1 = "data1";
+var getFunc = function() {
+  return obj.verifySetFunction1;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction1 = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc
+});
+
+verifyEqualTo(obj, "0", getFunc());
+
+verifyWritable(obj, "0", "verifySetFunction1");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-15.js
new file mode 100644
index 0000000000..938b50e4c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-15
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' using
+    simple assignment is successful, 'A' is an Array object (8.12.5
+    step 5.b)
+---*/
+
+var obj = [];
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+var getFunc = function() {
+  return verifySetFunc;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj.prop, "overrideData", 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-16.js
new file mode 100644
index 0000000000..d690167d9f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-16.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-16
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' using
+    simple assignment, 'O' is an Arguments object (8.12.5 step 5.b)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+var getFunc = function() {
+  return verifySetFunc;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+obj[0] = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("0");
+var desc = Object.getOwnPropertyDescriptor(obj, "0");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj[0], "overrideData", 'obj[0]');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js
new file mode 100644
index 0000000000..6c459d0db2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-2.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-2
+description: >
+    Object.defineProperty will update [[Get]] and [[Set]] attributes
+    of indexed accessor property 'P' successfully when
+    [[Configurable]] attribute is true, 'A' is an Array object (8.12.9
+    step 11)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = [];
+
+obj.verifySetFunction = "data";
+Object.defineProperty(obj, "0", {
+  get: function() {
+    return obj.verifySetFunction;
+  },
+  set: function(value) {
+    obj.verifySetFunction = value;
+  },
+  configurable: true
+});
+
+obj.verifySetFunction1 = "data1";
+var getFunc = function() {
+  return obj.verifySetFunction1;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction1 = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc
+});
+
+verifyEqualTo(obj, "0", getFunc());
+
+verifyWritable(obj, "0", "verifySetFunction1");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js
new file mode 100644
index 0000000000..0dc6f76257
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-3.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-3
+description: >
+    Object.defineProperty will update [[Get]] and [[Set]] attributes
+    of named accessor property successfully when [[Configurable]]
+    attribute is true, 'O' is an Arguments object (8.12.9 step 11)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunction = "data";
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return obj.verifySetFunction;
+  },
+  set: function(value) {
+    obj.verifySetFunction = value;
+  },
+  configurable: true
+});
+
+obj.verifySetFunction1 = "data1";
+var getFunc = function() {
+  return obj.verifySetFunction1;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction1 = value;
+};
+
+Object.defineProperty(obj, "property", {
+  get: getFunc,
+  set: setFunc
+});
+
+verifyEqualTo(obj, "property", getFunc());
+
+verifyWritable(obj, "property", "verifySetFunction1");
+
+verifyNotEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-6.js
new file mode 100644
index 0000000000..ffe9048f54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-6.js
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-6
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' without
+    [[Set]] using simple assignment is failed, 'A' is an Array object
+    (8.12.5 step 5.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+var verifySetFunc = "data";
+var getFunc = function() {
+  return verifySetFunc;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  enumerable: true,
+  configurable: true
+});
+
+verifyNotWritable(obj, "0");
+
+assert(obj.hasOwnProperty("0"));
+var desc = Object.getOwnPropertyDescriptor(obj, "0");
+
+assert.sameValue(typeof desc.set, "undefined");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-7.js
new file mode 100644
index 0000000000..4764a1c3f3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531-7.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531-7
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' without
+    [[Set]] using simple assignment is failed, 'O' is an Arguments
+    object (8.12.5 step 5.b)
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+var verifySetFunc = "data";
+var getFunc = function() {
+  return verifySetFunc;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  enumerable: true,
+  configurable: true
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotWritable(obj, "prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(typeof desc.set, "undefined");
+assert.sameValue(obj.prop, "data");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531.js
new file mode 100644
index 0000000000..15691d7062
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-531.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-531
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-532.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-532.js
new file mode 100644
index 0000000000..d49c562b8a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-532.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-532
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is true) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-533.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-533.js
new file mode 100644
index 0000000000..f7bedbaf67
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-533.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-533
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-534.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-534.js
new file mode 100644
index 0000000000..a7fa8e6466
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-534.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-534
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: undefined
+});
+
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-535.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-535.js
new file mode 100644
index 0000000000..453c4f2d78
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-535.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-535
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  set: undefined
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-536.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-536.js
new file mode 100644
index 0000000000..fc1a97a80a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-536.js
@@ -0,0 +1,54 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-536
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: false
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js
new file mode 100644
index 0000000000..e05ce8fecf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-537.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-537
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+verifyNotConfigurable(obj, "prop");
+assert.sameValue(desc1.configurable, true);
+assert.sameValue(desc2.configurable, false);
+assert(obj.hasOwnProperty("prop"));
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js
new file mode 100644
index 0000000000..06dd0aa4b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-1.js
@@ -0,0 +1,61 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-538-1
+description: >
+    ES5 Attributes - Updating an indexed 'P' whose [[Configurable]]
+    attribute is true to a data property is successful, 'A' is an
+    Array object (8.12.9 - step 9.c.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+Object.defineProperty(obj, "0", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+
+if (!desc1.hasOwnProperty("get")) {
+  throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+}
+
+if (!desc2.hasOwnProperty("value")) {
+  throw new Test262Error('Expected desc2.hasOwnProperty("value") to be true, actually ' + desc2.hasOwnProperty("value"));
+}
+
+if (typeof desc2.get !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.get === "undefined", actually ' + typeof desc2.get);
+}
+
+if (typeof desc2.set !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.set === "undefined", actually ' + typeof desc2.set);
+}
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyNotWritable(obj, "0");
+
+verifyEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js
new file mode 100644
index 0000000000..c1a03d0ff9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-2.js
@@ -0,0 +1,63 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-538-2
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' whose
+    [[Configurable]] attribute is true to a data property is
+    successful, 'O' is an Arguments object
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+if (!desc1.hasOwnProperty("get")) {
+  throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+}
+
+if (!desc2.hasOwnProperty("value")) {
+  throw new Test262Error('Expected desc2.hasOwnProperty("value") to be true, actually ' + desc2.hasOwnProperty("value"));
+}
+
+if (typeof desc2.get !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.get === "undefined" , actually ' + typeof desc2.get);
+}
+
+if (typeof desc2.set !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.set === "undefined" , actually ' + typeof desc2.set);
+}
+
+verifyEqualTo(obj, "prop", 1001);
+
+verifyNotWritable(obj, "prop");
+
+verifyEnumerable(obj, "prop");
+
+verifyConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js
new file mode 100644
index 0000000000..effdbc3676
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-5.js
@@ -0,0 +1,62 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-538-5
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' whose
+    [[Configurable]] attribute is true to a data property is
+    successful, 'A' is an Array object (8.12.9 - step 9.c.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+if (!desc1.hasOwnProperty("get")) {
+  throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+}
+
+if (!desc2.hasOwnProperty("value")) {
+  throw new Test262Error('Expected desc2.hasOwnProperty("value") to be true, actually ' + desc2.hasOwnProperty("value"));
+}
+
+if (typeof desc2.get !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.get === "undefined" , actually ' + typeof desc2.get);
+}
+
+if (typeof desc2.set !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.set === "undefined" , actually ' + typeof desc2.set);
+}
+
+
+verifyEqualTo(obj, "prop", 1001);
+
+verifyNotWritable(obj, "prop");
+
+verifyEnumerable(obj, "prop");
+
+verifyConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js
new file mode 100644
index 0000000000..4bfe9d32ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538-6.js
@@ -0,0 +1,63 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-538-6
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' whose
+    [[Configurable]] attribute is true to a data property is
+    successful, 'O' is an Arguments object
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+Object.defineProperty(obj, "0", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+
+if (!desc1.hasOwnProperty("get")) {
+  throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+}
+
+if (!desc2.hasOwnProperty("value")) {
+  throw new Test262Error('Expected desc2.hasOwnProperty("value") to be true, actually ' + desc2.hasOwnProperty("value"));
+}
+
+if (typeof desc2.get !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.get === "undefined" , actually ' + typeof desc2.get);
+}
+
+if (typeof desc2.set !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.set === "undefined" , actually ' + typeof desc2.set);
+}
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyNotWritable(obj, "0");
+
+verifyEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js
new file mode 100644
index 0000000000..8943f5cff9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-538.js
@@ -0,0 +1,58 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-538
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is true) to a data property
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: true
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+if (!desc1.hasOwnProperty("get")) {
+  throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+}
+
+if (!desc2.hasOwnProperty("value")) {
+  throw new Test262Error('Expected desc2.hasOwnProperty("value") to be true, actually ' + desc2.hasOwnProperty("value"));
+}
+
+if (typeof desc2.get !== "undefined") {
+  throw new Test262Error('Expected typeof desc2.get === "undefined" , actually ' + typeof desc2.get);
+}
+
+
+verifyEqualTo(obj, "prop", 1001);
+
+verifyNotWritable(obj, "prop");
+
+verifyEnumerable(obj, "prop");
+
+verifyConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-539.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-539.js
new file mode 100644
index 0000000000..e744cd0716
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-539.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-539
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js
new file mode 100644
index 0000000000..34de6eff1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-54.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-54
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Set]] of 'name' property of 'Attributes' is set as undefined
+    value if absent in accessor descriptor 'desc' (8.12.9 step 4.b.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return "property";
+  },
+  enumerable: false,
+  configurable: false
+});
+
+
+assert.sameValue(obj.property, "property");
+
+var desc = Object.getOwnPropertyDescriptor(obj, "property");
+assert.sameValue(typeof desc.set, "undefined");
+
+verifyNotEnumerable(obj, "property");
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js
new file mode 100644
index 0000000000..ac2f8d5fb0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-1.js
@@ -0,0 +1,72 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-1
+description: >
+    Object.defineProperty fails to update [[Get]] and [[Set]]
+    attributes of a named accessor property 'P' whose [[Configurable]]
+    attribute is false and throws TypeError exception, 'O' is an
+    Object object (8.12.9 step 11.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+obj.verifySetFunction = "data";
+var getFunc = function() {
+  return obj.verifySetFunction;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "property", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+var result = false;
+try {
+  Object.defineProperty(obj, "property", {
+    get: function() {
+      return 100;
+    }
+  });
+} catch (e) {
+  result = e instanceof TypeError;
+  verifyEqualTo(obj, "property", getFunc());
+
+  verifyWritable(obj, "property", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "property");
+
+  verifyNotConfigurable(obj, "property");
+}
+
+try {
+  Object.defineProperty(obj, "property", {
+    set: function(value) {
+      obj.verifySetFunction1 = value;
+    }
+  });
+} catch (e) {
+  if (!result) {
+    throw new Test262Error('Expected result to be true, actually ' + result);
+  }
+
+  verifyEqualTo(obj, "property", getFunc());
+
+  verifyWritable(obj, "property", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "property");
+
+  verifyNotConfigurable(obj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-10.js
new file mode 100644
index 0000000000..5fd551084d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-10.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-10
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' using
+    simple assignment is successful, 'O' is an Arguments object
+    (8.12.5 step 5.b)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+obj[0] = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("0");
+var desc = Object.getOwnPropertyDescriptor(obj, "0");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj.verifySetFunc, "overrideData", 'obj.verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js
new file mode 100644
index 0000000000..df61180433
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-2.js
@@ -0,0 +1,72 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-2
+description: >
+    Object.defineProperty fails to update [[Get]] and [[Set]]
+    attributes of an indexed property 'P' whose [[Configurable]]
+    attribute is false and throws TypeError exception, 'A' is an Array
+    object (8.12.9 step 11.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+obj.verifySetFunction = "data";
+var getFunc = function() {
+  return obj.verifySetFunction;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+var result = false;
+try {
+  Object.defineProperty(obj, "0", {
+    get: function() {
+      return 100;
+    }
+  });
+} catch (e) {
+  result = e instanceof TypeError;
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+}
+
+try {
+  Object.defineProperty(obj, "0", {
+    set: function(value) {
+      obj.verifySetFunction1 = value;
+    }
+  });
+} catch (e) {
+  if (!result) {
+    throw new Test262Error('Expected result  to be true, actually ' + result);
+  }
+
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js
new file mode 100644
index 0000000000..f7018700c9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-3.js
@@ -0,0 +1,74 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-3
+description: >
+    Object.defineProperty fails to update [[Get]] and [[Set]]
+    attributes of a named accessor property 'P' whose [[Configurable]]
+    attribute is false, 'O' is an Arguments object (8.12.9 step 11.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunction = "data";
+var getFunc = function() {
+  return obj.verifySetFunction;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "property", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+var result = false;
+try {
+  Object.defineProperty(obj, "property", {
+    get: function() {
+      return 100;
+    }
+  });
+} catch (e) {
+  result = e instanceof TypeError;
+  verifyEqualTo(obj, "property", getFunc());
+
+  verifyWritable(obj, "property", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "property");
+
+  verifyNotConfigurable(obj, "property");
+}
+
+try {
+  Object.defineProperty(obj, "property", {
+    set: function(value) {
+      obj.verifySetFunction1 = value;
+    }
+  });
+} catch (e) {
+
+  if (!result) {
+    throw new Test262Error('Expected result to be true, actually ' + result);
+  }
+
+  verifyEqualTo(obj, "property", getFunc());
+
+  verifyWritable(obj, "property", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "property");
+
+  verifyNotConfigurable(obj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-4.js
new file mode 100644
index 0000000000..d37bd35ae6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-4.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-4
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' using
+    simple assignment is successful, 'A' is an Array object (8.12.5
+    step 5.b)
+---*/
+
+var obj = [];
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+obj[0] = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("0");
+var desc = Object.getOwnPropertyDescriptor(obj, "0");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj.verifySetFunc, "overrideData", 'obj.verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-5.js
new file mode 100644
index 0000000000..a311c705b4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-5.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-5
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' using
+    simple assignment is successful, 'O' is an Arguments object
+    (8.12.5 step 5.b)
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj.verifySetFunc, "overrideData", 'obj.verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js
new file mode 100644
index 0000000000..64cc3ff55f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-6.js
@@ -0,0 +1,74 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-6
+description: >
+    Object.defineProperty fails to update [[Get]] and [[Set]]
+    attributes of an indexed accessor property 'P' whose
+    [[Configurable]] attribute is false and throws TypeError
+    exception, 'O' is an Object object (8.12.9 step 11.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+obj.verifySetFunction = "data";
+var getFunc = function() {
+  return obj.verifySetFunction;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+var result = false;
+try {
+  Object.defineProperty(obj, "0", {
+    get: function() {
+      return 100;
+    }
+  });
+} catch (e) {
+  result = e instanceof TypeError;
+
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+}
+
+try {
+  Object.defineProperty(obj, "0", {
+    set: function(value) {
+      obj.verifySetFunction1 = value;
+    }
+  });
+} catch (e) {
+  if (!result) {
+    throw new Test262Error('Expected result to be true, actually ' + result);
+  }
+
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js
new file mode 100644
index 0000000000..bc90c7b983
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-7.js
@@ -0,0 +1,74 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-7
+description: >
+    Object.defineProperty fails to update [[Get]] and [[Set]]
+    attributes of a named property 'P' whose [[Configurable]]
+    attribute is false and throws TypeError exception, 'A' is an Array
+    object (8.12.9 step 11.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+obj.verifySetFunction = "data";
+var getFunc = function() {
+  return obj.verifySetFunction;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+var result = false;
+try {
+  Object.defineProperty(obj, "prop", {
+    get: function() {
+      return 100;
+    }
+  });
+} catch (e) {
+  result = e instanceof TypeError;
+  verifyEqualTo(obj, "prop", getFunc());
+
+  verifyWritable(obj, "prop", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "prop");
+
+  verifyNotConfigurable(obj, "prop");
+}
+
+try {
+  Object.defineProperty(obj, "prop", {
+    set: function(value) {
+      obj.verifySetFunction1 = value;
+    }
+  });
+} catch (e1) {
+  if (!result) {
+    throw new Test262Error('Expected result to be true, actually ' + result);
+  }
+
+
+  verifyEqualTo(obj, "prop", getFunc());
+
+  verifyWritable(obj, "prop", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "prop");
+
+  verifyNotConfigurable(obj, "prop");
+
+
+  if (!(e1 instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e1);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js
new file mode 100644
index 0000000000..26be4c5177
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-8.js
@@ -0,0 +1,74 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-8
+description: >
+    Object.defineProperty fails to update [[Get]] and [[Set]]
+    attributes of an indexed accessor property 'P' whose
+    [[Configurable]] attribute is false, 'O' is an Arguments object
+    (8.12.9 step 11.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunction = "data";
+var getFunc = function() {
+  return obj.verifySetFunction;
+};
+var setFunc = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+var result = false;
+try {
+  Object.defineProperty(obj, "0", {
+    get: function() {
+      return 100;
+    }
+  });
+} catch (e) {
+  result = e instanceof TypeError;
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+}
+
+try {
+  Object.defineProperty(obj, "0", {
+    set: function(value) {
+      obj.verifySetFunction1 = value;
+    }
+  });
+} catch (e) {
+  if (!result) {
+    throw new Test262Error('Expected result  to be true, actually ' + result);
+  }
+
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunction");
+
+  verifyNotEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-9.js
new file mode 100644
index 0000000000..7bde4483d6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540-9.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540-9
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' using
+    simple assignment is successful, 'A' is an Array object (8.12.5
+    step 5.b)
+---*/
+
+var obj = [];
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj.verifySetFunc, "overrideData", 'obj.verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540.js
new file mode 100644
index 0000000000..9f6ea0441e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-540.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-540
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-541.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-541.js
new file mode 100644
index 0000000000..8eb0d4877d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-541.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-541
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is false) is
+    enumerable
+---*/
+
+var propertyFound = false;
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  if (p === "prop") {
+    propertyFound = true;
+    break;
+  }
+}
+
+assert(propertyFound, 'Property not found');
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, true, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js
new file mode 100644
index 0000000000..0768fd3034
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-542.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-542
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is true, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-543.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-543.js
new file mode 100644
index 0000000000..08b470da3c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-543.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-543
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: undefined
+  });
+});
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-544.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-544.js
new file mode 100644
index 0000000000..6a02e59d50
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-544.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-544
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: undefined
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-545.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-545.js
new file mode 100644
index 0000000000..0d9594d068
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-545.js
@@ -0,0 +1,55 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-545
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: false
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, true, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js
new file mode 100644
index 0000000000..bd266dbcb3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-546.js
@@ -0,0 +1,49 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-546
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is true, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+  assert.sameValue(desc1.configurable, false);
+
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+  assert.sameValue(desc2.configurable, false);
+
+  verifyNotConfigurable(obj, "prop");
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js
new file mode 100644
index 0000000000..ae003f7fdd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-1.js
@@ -0,0 +1,65 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-547-1
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' whose
+    [[Configurable]] attribute is false to a data property does not
+    succeed, 'A' is an Array object (8.12.9 step 9.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+try {
+  Object.defineProperty(obj, "0", {
+    value: 1001
+  });
+
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+
+  if (!desc1.hasOwnProperty("get")) {
+    throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+  }
+
+  if (desc2.hasOwnProperty("value")) {
+    throw new Test262Error('Expected !desc2.hasOwnProperty("value") to be true, actually ' + !desc2.hasOwnProperty("value"));
+  }
+
+
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunc");
+
+  verifyEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js
new file mode 100644
index 0000000000..6b40da84ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-2.js
@@ -0,0 +1,67 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-547-2
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' whose
+    [[Configurable]] attribute is false to a data property does not
+    succeed, 'A' is an Arguments object (8.12.9 step 9.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  if (!desc1.hasOwnProperty("get")) {
+    throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+  }
+
+  if (desc2.hasOwnProperty("value")) {
+    throw new Test262Error('Expected !desc2.hasOwnProperty("value") to be true, actually ' + !desc2.hasOwnProperty("value"));
+  }
+
+
+  verifyEqualTo(obj, "prop", getFunc());
+
+  verifyWritable(obj, "prop", "verifySetFunc");
+
+  verifyEnumerable(obj, "prop");
+
+  verifyNotConfigurable(obj, "prop");
+
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js
new file mode 100644
index 0000000000..db6e0fdd62
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-3.js
@@ -0,0 +1,64 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-547-3
+description: >
+    ES5 Attributes - Updating a named accessor property 'P' whose
+    [[Configurable]] attribute is false to a data property does not
+    succeed, 'A' is an Array object (8.12.9 step 9.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = [];
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+  if (!desc1.hasOwnProperty("get")) {
+    throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+  }
+
+  if (desc2.hasOwnProperty("value")) {
+    throw new Test262Error('Expected !desc2.hasOwnProperty("value") to be true, actually ' + !desc2.hasOwnProperty("value"));
+  }
+
+
+  verifyEqualTo(obj, "prop", getFunc());
+
+  verifyWritable(obj, "prop", "verifySetFunc");
+
+  verifyEnumerable(obj, "prop");
+
+  verifyNotConfigurable(obj, "prop");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js
new file mode 100644
index 0000000000..ffc954933e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547-4.js
@@ -0,0 +1,65 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-547-4
+description: >
+    ES5 Attributes - Updating an indexed accessor property 'P' whose
+    [[Configurable]] attribute is false to a data property does not
+    succeed, 'A' is an Arguments object (8.12.9 step 9.a)
+includes: [propertyHelper.js]
+---*/
+
+var obj = (function() {
+  return arguments;
+}());
+
+obj.verifySetFunc = "data";
+var getFunc = function() {
+  return obj.verifySetFunc;
+};
+
+var setFunc = function(value) {
+  obj.verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "0", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "0");
+
+try {
+  Object.defineProperty(obj, "0", {
+    value: 1001
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  var desc2 = Object.getOwnPropertyDescriptor(obj, "0");
+
+  if (!desc1.hasOwnProperty("get")) {
+    throw new Test262Error('Expected desc1.hasOwnProperty("get") to be true, actually ' + desc1.hasOwnProperty("get"));
+  }
+
+  if (desc2.hasOwnProperty("value")) {
+    throw new Test262Error('Expected !desc2.hasOwnProperty("value") to be true, actually ' + !desc2.hasOwnProperty("value"));
+  }
+
+  verifyEqualTo(obj, "0", getFunc());
+
+  verifyWritable(obj, "0", "verifySetFunc");
+
+  verifyEnumerable(obj, "0");
+
+  verifyNotConfigurable(obj, "0");
+
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547.js
new file mode 100644
index 0000000000..dcb19f54a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-547.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-547
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    a Function, [[Set]] is a Function, [[Enumerable]] is true,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: true,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-548.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-548.js
new file mode 100644
index 0000000000..11b2a79a51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-548.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-548
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-549.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-549.js
new file mode 100644
index 0000000000..629e2c352c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-549.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-549
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is true) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js
new file mode 100644
index 0000000000..ca020589dd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-55.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-55
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Enumerable]] of 'name' property of 'Attributes' is set as false
+    value if absent in accessor descriptor 'desc' (8.12.9 step 4.b.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var setFunc = function(value) {
+  obj.setVerifyHelpProp = value;
+};
+var getFunc = function() {
+  return 10;
+};
+
+Object.defineProperty(obj, "property", {
+  set: setFunc,
+  get: getFunc,
+  configurable: true
+});
+verifyEqualTo(obj, "property", getFunc());
+
+verifyWritable(obj, "property", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "property");
+
+verifyConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-550.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-550.js
new file mode 100644
index 0000000000..e85ee4d553
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-550.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-550
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is true) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-551.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-551.js
new file mode 100644
index 0000000000..cec2e0d83f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-551.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-551
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is true) is
+    deletable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+delete obj.prop;
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.configurable, true, 'desc.configurable');
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-552.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-552.js
new file mode 100644
index 0000000000..55303c7bd7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-552.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-552
+description: >
+    ES5 Attributes - success to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  get: undefined
+});
+
+var result2 = typeof obj.prop === "undefined";
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(typeof desc2.get, "undefined", 'typeof desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-553.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-553.js
new file mode 100644
index 0000000000..726c412524
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-553.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-553
+description: >
+    ES5 Attributes - success to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  set: undefined
+});
+
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(typeof desc2.set, "undefined", 'typeof desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-554.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-554.js
new file mode 100644
index 0000000000..cfc4cf2d80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-554.js
@@ -0,0 +1,55 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-554
+description: >
+    ES5 Attributes - success to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+
+Object.defineProperty(obj, "prop", {
+  enumerable: true
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, true, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js
new file mode 100644
index 0000000000..96f0f78ea5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-555.js
@@ -0,0 +1,41 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-555
+description: >
+    ES5 Attributes - success to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is true) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.sameValue(desc1.configurable, true);
+
+Object.defineProperty(obj, "prop", {
+  configurable: false
+});
+
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-556.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-556.js
new file mode 100644
index 0000000000..ecfdcf0cc0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-556.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-556
+description: >
+    ES5 Attributes - success to update the accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is true) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: true
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+Object.defineProperty(obj, "prop", {
+  value: 1001
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert(desc2.hasOwnProperty("value"), 'desc2.hasOwnProperty("value") !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-557.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-557.js
new file mode 100644
index 0000000000..25d9fba3ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-557.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-557
+description: >
+    ES5 Attributes - [[Get]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 1001, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-558.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-558.js
new file mode 100644
index 0000000000..d9626d1995
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-558.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-558
+description: >
+    ES5 Attributes - [[Set]] attribute of accessor property ([[Get]]
+    is a Function, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is false) is the expected function
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+obj.prop = "overrideData";
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, "overrideData", 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-559.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-559.js
new file mode 100644
index 0000000000..aae9e8e40e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-559.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-559
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is false) is
+    non-enumerable
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var propertyDefineCorrect = obj.hasOwnProperty("prop");
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+for (var p in obj) {
+  assert.notSameValue(p, "prop", 'p');
+}
+
+assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
+assert.sameValue(desc.enumerable, false, 'desc.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js
new file mode 100644
index 0000000000..c5ea0ffad5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-56.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-56
+description: >
+    Object.defineProperty - 'name' property doesn't exist in 'O', test
+    [[Configurable]] of 'name' property is set as false if it is
+    absent in accessor descriptor 'desc' (8.12.9 step 4.b.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+var setFunc = function(value) {
+  obj.setVerifyHelpProp = value;
+};
+var getFunc = function() {
+  return 10;
+};
+
+Object.defineProperty(obj, "property", {
+  set: setFunc,
+  get: getFunc,
+  enumerable: true
+});
+verifyEqualTo(obj, "property", getFunc());
+
+verifyWritable(obj, "property", "setVerifyHelpProp");
+
+verifyEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js
new file mode 100644
index 0000000000..127e3d4d42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-560.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-560
+description: >
+    ES5 Attributes - property ([[Get]] is a Function, [[Set]] is a
+    Function, [[Enumerable]] is false, [[Configurable]] is false) is
+    undeletable
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+assert(obj.hasOwnProperty("prop"));
+verifyNotConfigurable(obj, "prop");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-561.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-561.js
new file mode 100644
index 0000000000..676338c4be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-561.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-561
+description: >
+    ES5 Attributes - fail to update [[Get]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var result1 = obj.prop === 1001;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    get: undefined
+  });
+});
+var result2 = obj.prop === 1001;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(result1, 'result1 !== true');
+assert(result2, 'result2 !== true');
+assert.sameValue(desc1.get, getFunc, 'desc1.get');
+assert.sameValue(desc2.get, getFunc, 'desc2.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-562.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-562.js
new file mode 100644
index 0000000000..f68f4cda5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-562.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-562
+description: >
+    ES5 Attributes - fail to update [[Set]] attribute of accessor
+    property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    set: undefined
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert.sameValue(desc1.set, setFunc, 'desc1.set');
+assert.sameValue(desc2.set, setFunc, 'desc2.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-563.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-563.js
new file mode 100644
index 0000000000..ac8907dba4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-563.js
@@ -0,0 +1,55 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-563
+description: >
+    ES5 Attributes - fail to update [[Enumerable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+var result1 = false;
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p1 in obj) {
+  if (p1 === "prop") {
+    result1 = true;
+  }
+}
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    enumerable: true
+  });
+});
+var result2 = false;
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+for (var p2 in obj) {
+  if (p2 === "prop") {
+    result2 = true;
+  }
+}
+
+assert.sameValue(result1, false, 'result1');
+assert.sameValue(result2, false, 'result2');
+assert.sameValue(desc1.enumerable, false, 'desc1.enumerable');
+assert.sameValue(desc2.enumerable, false, 'desc2.enumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js
new file mode 100644
index 0000000000..b4d0e29416
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-564.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-564
+description: >
+    ES5 Attributes - fail to update [[Configurable]] attribute of
+    accessor property ([[Get]] is a Function, [[Set]] is a Function,
+    [[Enumerable]] is false, [[Configurable]] is false) to different
+    value
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+try {
+  Object.defineProperty(obj, "prop", {
+    configurable: true
+  });
+
+  throw new Test262Error("Expected TypeError");
+} catch (e) {
+  assert(e instanceof TypeError);
+  assert.sameValue(desc1.configurable, false);
+  verifyNotConfigurable(obj, "prop");
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-565.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-565.js
new file mode 100644
index 0000000000..6b94355849
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-565.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-565
+description: >
+    ES5 Attributes - fail to update the accessor property ([[Get]] is
+    a Function, [[Set]] is a Function, [[Enumerable]] is false,
+    [[Configurable]] is false) to a data property
+---*/
+
+var obj = {};
+
+var getFunc = function() {
+  return 1001;
+};
+
+var verifySetFunc = "data";
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc,
+  set: setFunc,
+  enumerable: false,
+  configurable: false
+});
+var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
+assert.throws(TypeError, function() {
+  Object.defineProperty(obj, "prop", {
+    value: 1001
+  });
+});
+var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(desc1.hasOwnProperty("get"), 'desc1.hasOwnProperty("get") !== true');
+assert.sameValue(desc2.hasOwnProperty("value"), false, 'desc2.hasOwnProperty("value")');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-566.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-566.js
new file mode 100644
index 0000000000..05c97023f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-566.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-566
+description: >
+    ES5 Attributes - [[Get]] attribute is a function which has zero
+    argument
+---*/
+
+var obj = {};
+var getFunc = function() {
+  return 2010;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-567.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-567.js
new file mode 100644
index 0000000000..a93935c00e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-567.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-567
+description: >
+    ES5 Attributes - [[Get]] attribute is a function which has one
+    argument
+---*/
+
+var obj = {};
+var getFunc = function(arg1) {
+  return 2010;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-568.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-568.js
new file mode 100644
index 0000000000..0cf2eaefcb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-568.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-568
+description: >
+    ES5 Attributes - [[Get]] attribute is a function which has two
+    arguments
+---*/
+
+var obj = {};
+var getFunc = function(arg1, arg2) {
+  return 2010;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-569.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-569.js
new file mode 100644
index 0000000000..42c3a18254
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-569.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-569
+description: >
+    ES5 Attributes - [[Get]] attribute is a function which contains
+    global variable
+---*/
+
+var obj = {};
+var globalVariable = 20;
+var getFunc = function() {
+  globalVariable = 2010;
+  return globalVariable;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(obj.prop, 2010, 'obj.prop');
+assert.sameValue(globalVariable, 2010, 'globalVariable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js
new file mode 100644
index 0000000000..5ad316ca51
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-57.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-57
+description: >
+    Object.defineProperty - 'desc' is accessor descriptor, test
+    updating all attribute values of 'name' (8.12.9 step 4.b.i)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+var setFunc = function(value) {
+  obj.setVerifyHelpProp = value;
+};
+var getFunc = function() {
+  return 14;
+};
+
+Object.defineProperty(obj, "property", {
+  get: function() {
+    return 11;
+  },
+  set: function(value) {},
+  configurable: true,
+  enumerable: true
+});
+
+Object.defineProperty(obj, "property", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false,
+  enumerable: false
+});
+
+verifyEqualTo(obj, "property", getFunc());
+
+verifyWritable(obj, "property", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "property");
+
+verifyNotConfigurable(obj, "property");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-570.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-570.js
new file mode 100644
index 0000000000..84cb1ae3e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-570.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-570
+description: >
+    ES5 Attributes - [[Get]] attribute is a function which doesn't
+    contains return statement
+---*/
+
+var obj = {};
+var verifyExecute = false;
+var getFunc = function() {
+  verifyExecute = true;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+assert.sameValue(typeof obj.prop, "undefined", 'typeof obj.prop');
+assert(verifyExecute, 'verifyExecute !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-571.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-571.js
new file mode 100644
index 0000000000..f16afa3929
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-571.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-571
+description: >
+    ES5 Attributes - [[Get]] attribute is a function which involves
+    'this' object into statement(s)
+---*/
+
+var obj = {
+  len: 2010
+};
+var getFunc = function() {
+  return this;
+};
+
+Object.defineProperty(obj, "prop", {
+  get: getFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(obj.prop, obj, 'obj.prop');
+assert.sameValue(desc.get, getFunc, 'desc.get');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-572.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-572.js
new file mode 100644
index 0000000000..a5edb3f1c4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-572.js
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-572
+description: >
+    ES5 Attributes - [[Set]] attribute is a function which has zero
+    argument
+---*/
+
+var obj = {};
+
+var setFunc = function() {};
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-573.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-573.js
new file mode 100644
index 0000000000..9815868d23
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-573.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-573
+description: >
+    ES5 Attributes - [[Set]] attribute is a function which has one
+    argument
+---*/
+
+var obj = {};
+
+var verifySetFunc = 20;
+var setFunc = function(value) {
+  verifySetFunc = value;
+};
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+obj.prop = 2010;
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(verifySetFunc, 2010, 'verifySetFunc');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-574.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-574.js
new file mode 100644
index 0000000000..7a402e76b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-574.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-574
+description: >
+    ES5 Attributes - [[Set]] attribute is a function which has two
+    arguments
+---*/
+
+var obj = {};
+var firstArg = 12;
+var secondArg = 12;
+
+var setFunc = function(a, b) {
+  firstArg = a;
+  secondArg = b;
+};
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+obj.prop = 100;
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(firstArg, 100, 'firstArg');
+assert.sameValue(typeof secondArg, "undefined", 'typeof secondArg');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-575.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-575.js
new file mode 100644
index 0000000000..b31aa4e181
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-575.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-575
+description: >
+    ES5 Attributes - [[Set]] attribute is a function which contains
+    global variable
+---*/
+
+var obj = {};
+var globalVariable = 20;
+var setFunc = function() {
+  globalVariable = 2010;
+};
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+obj.prop = 10;
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(globalVariable, 2010, 'globalVariable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-576.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-576.js
new file mode 100644
index 0000000000..52bd9123d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-576.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-576
+description: >
+    ES5 Attributes - [[Set]] attribute is a function which contains
+    return statement
+---*/
+
+var obj = {};
+
+var setFunc = function() {
+  return 2010;
+};
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-577.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-577.js
new file mode 100644
index 0000000000..a55c79eca3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-577.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-577
+description: >
+    ES5 Attributes - [[Set]] attribute is a function which involves
+    'this' object into statement(s)
+---*/
+
+var obj = {};
+
+var setFunc = function(value) {
+  this.len = value;
+};
+
+Object.defineProperty(obj, "prop", {
+  set: setFunc
+});
+obj.prop = 2010;
+
+var desc = Object.getOwnPropertyDescriptor(obj, "prop");
+
+assert(obj.hasOwnProperty("prop"), 'obj.hasOwnProperty("prop") !== true');
+assert.sameValue(desc.set, setFunc, 'desc.set');
+assert.sameValue(obj.len, 2010, 'obj.len');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-578.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-578.js
new file mode 100644
index 0000000000..358bb82cf3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-578.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-578
+description: >
+    ES5 Attributes - [[Get]] field of inherited property of
+    [[Prototype]] internal property is correct (String instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(String.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var strObj = new String();
+
+assert.sameValue(strObj.hasOwnProperty("prop"), false, 'strObj.hasOwnProperty("prop")');
+assert.sameValue(strObj.prop, "data", 'strObj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-579.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-579.js
new file mode 100644
index 0000000000..9ef0b9c4ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-579.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-579
+description: >
+    ES5 Attributes - Success to add property into object (Array
+    instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(Array.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var arrObj = [];
+arrObj.prop = "myOwnProperty";
+
+assert.sameValue(arrObj.hasOwnProperty("prop"), false, 'arrObj.hasOwnProperty("prop")');
+assert.sameValue(arrObj.prop, "myOwnProperty", 'arrObj.prop');
+assert.sameValue(data, "myOwnProperty", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js
new file mode 100644
index 0000000000..d561f384f6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-58.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-58
+description: >
+    Object.defineProperty - 'name' is data descriptor and every fields
+    in 'desc' is absent (8.12.9 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+obj.foo = 101; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {});
+verifyEqualTo(obj, "foo", 101);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-580.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-580.js
new file mode 100644
index 0000000000..0086d54c9a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-580.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-580
+description: >
+    ES5 Attributes - Inherited property is enumerable (Boolean
+    instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(Boolean.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var boolObj = new Boolean();
+var verifyEnumerable = false;
+for (var p in boolObj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(boolObj.hasOwnProperty("prop"), false, 'boolObj.hasOwnProperty("prop")');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-581.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-581.js
new file mode 100644
index 0000000000..fae2d10b5a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-581.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-581
+description: ES5 Attributes - Fail to add property into object (Number instance)
+includes: [propertyHelper.js]
+---*/
+
+var data = "data";
+
+Object.defineProperty(Number.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  enumerable: false,
+  configurable: true
+});
+var numObj = new Number();
+
+verifyNotWritable(numObj, "prop", "nocheck");
+
+assert(!numObj.hasOwnProperty("prop"));
+assert.sameValue(numObj.prop, "data");
+assert.sameValue(data, "data");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-582.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-582.js
new file mode 100644
index 0000000000..5981ca69d4
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-582.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-582
+description: >
+    ES5 Attributes - Inherited property is non-enumerable (Function
+    instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(Function.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  enumerable: false,
+  configurable: true
+});
+var funObj = function() {};
+var verifyEnumerable = false;
+for (var p in funObj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(funObj.hasOwnProperty("prop"), false, 'funObj.hasOwnProperty("prop")');
+assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-583.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-583.js
new file mode 100644
index 0000000000..699dd23cfd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-583.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-583
+description: >
+    ES5 Attributes - [[Get]] field of inherited property of
+    [[Prototype]] internal property is correct (Error Instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(Error.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var errObj = new Error();
+
+assert.sameValue(errObj.hasOwnProperty("prop"), false, 'errObj.hasOwnProperty("prop")');
+assert.sameValue(errObj.prop, "data", 'errObj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-584.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-584.js
new file mode 100644
index 0000000000..b9d9c07aa0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-584.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-584
+description: ES5 Attributes - Failed to add property into object (Date instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(Date.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var dateObj = new Date();
+dateObj.prop = "myOwnProperty";
+
+assert.sameValue(dateObj.hasOwnProperty("prop"), false, 'dateObj.hasOwnProperty("prop")');
+assert.sameValue(dateObj.prop, "myOwnProperty", 'dateObj.prop');
+assert.sameValue(data, "myOwnProperty", 'data');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-585.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-585.js
new file mode 100644
index 0000000000..1149bdf239
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-585.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-585
+description: ES5 Attributes - Inherited property is enumerable (RegExp instance)
+---*/
+
+var data = "data";
+
+Object.defineProperty(RegExp.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var regObj = new RegExp();
+var verifyEnumerable = false;
+for (var p in regObj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(regObj.hasOwnProperty("prop"), false, 'regObj.hasOwnProperty("prop")');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-586.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-586.js
new file mode 100644
index 0000000000..fb50b43e6a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-586.js
@@ -0,0 +1,27 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-586
+description: >
+    ES5 Attributes - Fail to update value of property into of
+    [[Proptotype]] internal property  (JSON)
+includes: [propertyHelper.js]
+---*/
+
+var data = "data";
+
+Object.defineProperty(Object.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  enumerable: false,
+  configurable: true
+});
+verifyNotWritable(JSON, "prop", "nocheck");
+
+assert(!JSON.hasOwnProperty("prop"));
+assert.sameValue(JSON.prop, "data");
+assert.sameValue(data, "data");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-587.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-587.js
new file mode 100644
index 0000000000..a91e8f24e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-587.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-587
+description: ES5 Attributes - Inherited property is non-enumerable (Math)
+---*/
+
+var data = "data";
+
+Object.defineProperty(Object.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  enumerable: false,
+  configurable: true
+});
+var verifyEnumerable = false;
+for (var p in Math) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(Math.hasOwnProperty("prop"), false, 'Math.hasOwnProperty("prop")');
+assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-588.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-588.js
new file mode 100644
index 0000000000..d8b8f95674
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-588.js
@@ -0,0 +1,54 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-588
+description: >
+    ES5 Attributes - [[Get]] field of inherited property of
+    [[Prototype]] internal property is correct (Object.create)
+---*/
+
+var appointment = {};
+
+var data1 = 1001;
+Object.defineProperty(appointment, "startTime", {
+  get: function() {
+    return data1;
+  },
+  enumerable: true,
+  configurable: false
+});
+var data2 = "NAME";
+Object.defineProperty(appointment, "name", {
+  get: function() {
+    return data2;
+  },
+  set: function(value) {
+    data2 = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+var data3 = "In-person meeting";
+Object.defineProperty(meeting, "conferenceCall", {
+  get: function() {
+    return data3;
+  },
+  enumerable: true,
+  configurable: false
+});
+
+var teamMeeting = Object.create(meeting);
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty('conferenceCall');
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert.sameValue(teamMeeting.name, "NAME", 'teamMeeting.name');
+assert.sameValue(teamMeeting.startTime, 1001, 'teamMeeting.startTime');
+assert.sameValue(teamMeeting.conferenceCall, "In-person meeting", 'teamMeeting.conferenceCall');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-589.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-589.js
new file mode 100644
index 0000000000..e5a319257b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-589.js
@@ -0,0 +1,64 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-589
+description: >
+    ES5 Attributes - Success to update value of property into of
+    [[Proptotype]] internal property (Object.create)
+---*/
+
+var appointment = {};
+
+var data1 = 1001;
+Object.defineProperty(appointment, "startTime", {
+  get: function() {
+    return data1;
+  },
+  set: function(value) {
+    data1 = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var data2 = "NAME";
+Object.defineProperty(appointment, "name", {
+  get: function() {
+    return data2;
+  },
+  set: function(value) {
+    data2 = value;
+  },
+  enumerable: true,
+  configurable: false
+});
+
+var meeting = Object.create(appointment);
+var data3 = "In-person meeting";
+Object.defineProperty(meeting, "conferenceCall", {
+  get: function() {
+    return data3;
+  },
+  set: function(value) {
+    data3 = value;
+  },
+  enumerable: true,
+  configurable: false
+});
+
+var teamMeeting = Object.create(meeting);
+teamMeeting.name = "Team Meeting";
+var dateObj = new Date("10/31/2010 08:00");
+teamMeeting.startTime = dateObj;
+teamMeeting.conferenceCall = "4255551212";
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty('conferenceCall');
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert.sameValue(teamMeeting.name, "Team Meeting", 'teamMeeting.name');
+assert.sameValue(teamMeeting.startTime, dateObj, 'teamMeeting.startTime');
+assert.sameValue(teamMeeting.conferenceCall, "4255551212", 'teamMeeting.conferenceCall');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js
new file mode 100644
index 0000000000..903ac63326
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-59.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-59
+description: >
+    Object.defineProperty - 'name' is accessor descriptor and every
+    fields in 'desc' is absent (8.12.9 step 5)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 0;
+}
+
+function setFunc(value) {
+  obj.helpVerifySet = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc
+});
+
+Object.defineProperty(obj, "foo", {});
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyWritable(obj, "foo", "helpVerifySet");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-590.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-590.js
new file mode 100644
index 0000000000..cb49b9f3ec
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-590.js
@@ -0,0 +1,73 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-590
+description: ES5 Attributes - Inherited property is enumerable (Object.create)
+---*/
+
+var appointment = {};
+
+var data1 = 1001;
+Object.defineProperty(appointment, "startTime", {
+  get: function() {
+    return data1;
+  },
+  set: function(value) {
+    data1 = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+var data2 = "NAME";
+Object.defineProperty(appointment, "name", {
+  get: function() {
+    return data2;
+  },
+  set: function(value) {
+    data2 = value;
+  },
+  enumerable: true,
+  configurable: false
+});
+
+var meeting = Object.create(appointment);
+var data3 = "In-person meeting";
+Object.defineProperty(meeting, "conferenceCall", {
+  get: function() {
+    return data3;
+  },
+  set: function(value) {
+    data3 = value;
+  },
+  enumerable: true,
+  configurable: false
+});
+
+var teamMeeting = Object.create(meeting);
+
+var verifyTimeProp = false;
+var verifyNameProp = false;
+var verifyCallProp = false;
+for (var p in teamMeeting) {
+  if (p === "startTime") {
+    verifyTimeProp = true;
+  }
+  if (p === "name") {
+    verifyNameProp = true;
+  }
+  if (p === "conferenceCall") {
+    verifyCallProp = true;
+  }
+}
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty('conferenceCall');
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert(verifyTimeProp, 'verifyTimeProp !== true');
+assert(verifyNameProp, 'verifyNameProp !== true');
+assert(verifyCallProp, 'verifyCallProp !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-591.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-591.js
new file mode 100644
index 0000000000..7fb8751e2e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-591.js
@@ -0,0 +1,75 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-591
+description: >
+    ES5 Attributes - Fail to update value of property of
+    [[Proptotype]] internal property (Object.create)
+includes: [propertyHelper.js]
+---*/
+
+var appointment = {};
+
+var data1 = 1001;
+Object.defineProperty(appointment, "startTime", {
+  get: function() {
+    return data1;
+  },
+  enumerable: false,
+  configurable: false
+});
+var data2 = "NAME";
+Object.defineProperty(appointment, "name", {
+  get: function() {
+    return data2;
+  },
+  enumerable: false,
+  configurable: true
+});
+
+var meeting = Object.create(appointment);
+var data3 = "In-person meeting";
+Object.defineProperty(meeting, "conferenceCall", {
+  get: function() {
+    return data3;
+  },
+  enumerable: false,
+  configurable: false
+});
+
+var teamMeeting = Object.create(meeting);
+
+verifyNotWritable(teamMeeting, "name", "nocheck");
+verifyNotWritable(teamMeeting, "startTime", "nocheck");
+verifyNotWritable(teamMeeting, "conferenceCall", "nocheck");
+
+try {
+  teamMeeting.name = "IE Team Meeting";
+} catch (e) {
+  assert(e instanceof TypeError);
+}
+
+try {
+  var dateObj = new Date("10/31/2010 08:00");
+  teamMeeting.startTime = dateObj;
+} catch (e) {
+  assert(e instanceof TypeError);
+}
+
+try {
+  teamMeeting.conferenceCall = "4255551212";
+} catch (e) {
+  assert(e instanceof TypeError);
+}
+
+
+assert(!teamMeeting.hasOwnProperty("name"));
+assert(!teamMeeting.hasOwnProperty("startTime"));
+assert(!teamMeeting.hasOwnProperty('conferenceCall'));
+
+assert.sameValue(teamMeeting.name, "NAME");
+assert.sameValue(teamMeeting.startTime, 1001);
+assert.sameValue(teamMeeting.conferenceCall, "In-person meeting");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-592.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-592.js
new file mode 100644
index 0000000000..d5840aea14
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-592.js
@@ -0,0 +1,66 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-592
+description: >
+    ES5 Attributes - Inherited property is non-enumerable
+    (Object.create)
+---*/
+
+var appointment = {};
+
+var data1 = 1001;
+Object.defineProperty(appointment, "startTime", {
+  get: function() {
+    return data1;
+  },
+  enumerable: false,
+  configurable: true
+});
+var data2 = "NAME";
+Object.defineProperty(appointment, "name", {
+  get: function() {
+    return data2;
+  },
+  enumerable: false,
+  configurable: false
+});
+
+var meeting = Object.create(appointment);
+var data3 = "In-person meeting";
+Object.defineProperty(meeting, "conferenceCall", {
+  get: function() {
+    return data3;
+  },
+  enumerable: false,
+  configurable: true
+});
+
+var teamMeeting = Object.create(meeting);
+
+var verifyTimeProp = false;
+var verifyNameProp = false;
+var verifyCallProp = false;
+for (var p in teamMeeting) {
+  if (p === "startTime") {
+    verifyTimeProp = true;
+  }
+  if (p === "name") {
+    verifyNameProp = true;
+  }
+  if (p === "conferenceCall") {
+    verifyCallProp = true;
+  }
+}
+
+var hasOwnProperty = !teamMeeting.hasOwnProperty("name") &&
+  !teamMeeting.hasOwnProperty("startTime") &&
+  !teamMeeting.hasOwnProperty('conferenceCall');
+
+assert(hasOwnProperty, 'hasOwnProperty !== true');
+assert.sameValue(verifyTimeProp, false, 'verifyTimeProp');
+assert.sameValue(verifyNameProp, false, 'verifyNameProp');
+assert.sameValue(verifyCallProp, false, 'verifyCallProp');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-593.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-593.js
new file mode 100644
index 0000000000..7c85bed474
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-593.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-593
+description: >
+    ES5 Attributes - [[Get]] field of inherited property of
+    [[Prototype]] internal property is correct
+    (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+var data = "data";
+
+Object.defineProperty(Function.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+
+var obj = foo.bind({});
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert.sameValue(obj.prop, data, 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-594.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-594.js
new file mode 100644
index 0000000000..57b81e70e5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-594.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-594
+description: >
+    ES5 Attributes - Success to update value of property into of
+    [[Proptotype]] internal property (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+var data = "data";
+
+Object.defineProperty(Function.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+
+var obj = foo.bind({});
+obj.prop = "overrideData";
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert.sameValue(obj.prop, "overrideData", 'obj.prop');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-595.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-595.js
new file mode 100644
index 0000000000..5df8b4da09
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-595.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-595
+description: >
+    ES5 Attributes - Inherited property is enumerable
+    (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+var data = "data";
+
+Object.defineProperty(Function.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  set: function(value) {
+    data = value;
+  },
+  enumerable: true,
+  configurable: true
+});
+
+var obj = foo.bind({});
+
+var verifyEnumerable = false;
+for (var p in obj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert(verifyEnumerable, 'verifyEnumerable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-596.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-596.js
new file mode 100644
index 0000000000..f875674657
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-596.js
@@ -0,0 +1,29 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-596
+description: >
+    ES5 Attributes - Fail to update value of property into of
+    [[Proptotype]] internal property (Function.prototype.bind)
+includes: [propertyHelper.js]
+---*/
+
+var foo = function() {};
+var data = "data";
+
+Object.defineProperty(Function.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  enumerable: false,
+  configurable: true
+});
+
+var obj = foo.bind({});
+
+assert(!obj.hasOwnProperty("prop"));
+verifyNotWritable(obj, "prop", "nocheck");
+assert.sameValue(obj.prop, "data");;
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-597.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-597.js
new file mode 100644
index 0000000000..135bcecf9c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-597.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-597
+description: >
+    ES5 Attributes - Inherited property is non-enumerable
+    (Function.prototype.bind)
+---*/
+
+var foo = function() {};
+var data = "data";
+
+Object.defineProperty(Function.prototype, "prop", {
+  get: function() {
+    return data;
+  },
+  enumerable: false,
+  configurable: true
+});
+
+var obj = foo.bind({});
+
+var verifyEnumerable = false;
+for (var p in obj) {
+  if (p === "prop") {
+    verifyEnumerable = true;
+  }
+}
+
+assert.sameValue(obj.hasOwnProperty("prop"), false, 'obj.hasOwnProperty("prop")');
+assert.sameValue(verifyEnumerable, false, 'verifyEnumerable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-598.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-598.js
new file mode 100644
index 0000000000..bd8b55eae2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-598.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-598
+description: >
+    ES5 Attributes - all attributes in Object.getPrototypeOf are
+    correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "getPrototypeOf", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-599.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-599.js
new file mode 100644
index 0000000000..1c388fe221
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-599.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-599
+description: >
+    ES5 Attributes - all attributes in Object.getOwnPropertyDescriptor
+    are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "getOwnPropertyDescriptor", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-6.js
new file mode 100644
index 0000000000..ac7627a639
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-6.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 6 of [[DefineOwnProperty]] returns if
+    every field of desc also occurs in current and every field in desc has
+    the same value as current.
+es5id: 15.2.3.6-4-6
+description: >
+    Object.defineProperty is no-op if current and desc are the same
+    accessor desc
+---*/
+
+function sameAccessorDescriptorValues(d1, d2) {
+  return (d1.get == d2.get &&
+    d1.enumerable == d2.enumerable &&
+    d1.configurable == d2.configurable);
+}
+
+var o = {};
+
+// create an accessor property with the following attributes:
+// enumerable: true, configurable: true
+var desc = {
+  get: function() {},
+  enumerable: true,
+  configurable: true
+};
+
+Object.defineProperty(o, "foo", desc);
+
+// query for, and save, the desc. A subsequent call to defineProperty
+// with the same desc should not disturb the property definition.
+var d1 = Object.getOwnPropertyDescriptor(o, "foo");
+
+// now, redefine the property with the same descriptor
+// the property defintion should not get disturbed.
+Object.defineProperty(o, "foo", desc);
+
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(sameAccessorDescriptorValues(d1, d2), true, 'sameAccessorDescriptorValues(d1, d2)');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js
new file mode 100644
index 0000000000..bb14e77bed
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-60.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-60
+description: >
+    Object.defineProperty - type of desc.value is different from type
+    of name.value (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+obj.foo = 101; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: "abc"
+});
+verifyEqualTo(obj, "foo", "abc");
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-600.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-600.js
new file mode 100644
index 0000000000..fccdb4ed06
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-600.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-600
+description: >
+    ES5 Attributes - all attributes in Object.getOwnPropertyNames are
+    correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "getOwnPropertyNames", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-601.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-601.js
new file mode 100644
index 0000000000..ebb199e657
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-601.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-601
+description: ES5 Attributes - all attributes in Object.create are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "getPrototypeOf", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-602.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-602.js
new file mode 100644
index 0000000000..341be624a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-602.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-602
+description: >
+    ES5 Attributes - all attributes in Object.defineProperty are
+    correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "defineProperty", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-603.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-603.js
new file mode 100644
index 0000000000..7a37c11746
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-603.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-603
+description: >
+    ES5 Attributes - all attributes in Object.defineProperties are
+    correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "defineProperties", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-604.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-604.js
new file mode 100644
index 0000000000..c3b1567828
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-604.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-604
+description: ES5 Attributes - all attributes in Object.seal are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "seal", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-605.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-605.js
new file mode 100644
index 0000000000..5ad929ddc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-605.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-605
+description: ES5 Attributes - all attributes in Object.freeze are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "freeze", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-606.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-606.js
new file mode 100644
index 0000000000..984a13e886
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-606.js
@@ -0,0 +1,18 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-606
+description: >
+    ES5 Attributes - all attributes in Object.preventExtensions are
+    correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "preventExtensions", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-607.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-607.js
new file mode 100644
index 0000000000..6310643147
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-607.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-607
+description: ES5 Attributes - all attributes in Object.isSealed are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "isSealed", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-608.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-608.js
new file mode 100644
index 0000000000..4abcbf78a5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-608.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-608
+description: ES5 Attributes - all attributes in Object.isFrozen are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "isFrozen", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-609.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-609.js
new file mode 100644
index 0000000000..9c35a503b5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-609.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-609
+description: ES5 Attributes - all attributes in Object.isExtensible are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "isExtensible", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js
new file mode 100644
index 0000000000..a59d8e6098
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-61.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-61
+description: >
+    Object.defineProperty - both desc.value and name.value are
+    undefined (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: undefined
+});
+
+Object.defineProperty(obj, "foo", {
+  value: undefined
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-610.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-610.js
new file mode 100644
index 0000000000..6a2e387804
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-610.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-610
+description: ES5 Attributes - all attributes in Object.keys are correct
+includes: [propertyHelper.js]
+---*/
+
+verifyProperty(Object, "keys", {
+  writable: true,
+  enumerable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js
new file mode 100644
index 0000000000..19c0ef715c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-611.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-611
+description: >
+    ES5 Attributes - all attributes in Function.prototype.bind are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Function.prototype, "bind");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Function.prototype.bind;
+
+Function.prototype.bind = "2010";
+
+var isWritable = (Function.prototype.bind === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Function.prototype) {
+  if (prop === "bind") {
+    isEnumerable = true;
+  }
+}
+
+delete Function.prototype.bind;
+
+var isConfigurable = !Function.prototype.hasOwnProperty("bind");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js
new file mode 100644
index 0000000000..e33d81a9c2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-612.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-612
+description: >
+    ES5 Attributes - all attributes in Array.prototype.indexOf are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "indexOf");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.indexOf;
+
+Array.prototype.indexOf = "2010";
+
+var isWritable = (Array.prototype.indexOf === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "indexOf") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.indexOf;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("indexOf");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js
new file mode 100644
index 0000000000..162333109f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-613.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-613
+description: ES5 Attributes - all attributes in Object.lastIndexOf are correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "lastIndexOf");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.lastIndexOf;
+
+Array.prototype.lastIndexOf = "2010";
+
+var isWritable = (Array.prototype.lastIndexOf === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "lastIndexOf") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.lastIndexOf;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("lastIndexOf");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js
new file mode 100644
index 0000000000..368a3b8977
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-614.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-614
+description: >
+    ES5 Attributes - all attributes in Array.prototype.every are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "every");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.every;
+
+Array.prototype.every = "2010";
+
+var isWritable = (Array.prototype.every === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "every") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.every;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("every");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js
new file mode 100644
index 0000000000..c4deed0cd6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-615.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-615
+description: ES5 Attributes - all attributes in Array.prototype.some are correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "some");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.some;
+
+Array.prototype.some = "2010";
+
+var isWritable = (Array.prototype.some === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "some") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.some;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("some");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js
new file mode 100644
index 0000000000..d5547bda86
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-616.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-616
+description: >
+    ES5 Attributes - all attributes in Array.prototype.forEach are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "forEach");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.forEach;
+
+Array.prototype.forEach = "2010";
+
+var isWritable = (Array.prototype.forEach === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "forEach") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.forEach;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("forEach");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js
new file mode 100644
index 0000000000..0d18438ceb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-617.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-617
+description: ES5 Attributes - all attributes in Array.prototype.map are correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "map");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.map;
+
+Array.prototype.map = "2010";
+
+var isWritable = (Array.prototype.map === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "map") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.map;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("map");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js
new file mode 100644
index 0000000000..3e21462908
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-618.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-618
+description: >
+    ES5 Attributes - all attributes in Array.prototype.filter are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "filter");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.filter;
+
+Array.prototype.filter = "2010";
+
+var isWritable = (Array.prototype.filter === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "filter") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.filter;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("filter");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js
new file mode 100644
index 0000000000..746209ea13
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-619.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-619
+description: >
+    ES5 Attributes - all attributes in Array.prototype.reduce are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.reduce;
+
+Array.prototype.reduce = "2010";
+
+var isWritable = (Array.prototype.reduce === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "reduce") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.reduce;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("reduce");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js
new file mode 100644
index 0000000000..f16d18a98b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-62.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-62
+description: >
+    Object.defineProperty - both desc.value and name.value are null
+    (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: null
+});
+
+Object.defineProperty(obj, "foo", {
+  value: null
+});
+verifyEqualTo(obj, "foo", null);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js
new file mode 100644
index 0000000000..6ce2dbb7ce
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-620.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-620
+description: >
+    ES5 Attributes - all attributes in Array.prototype.reduceRight are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Array.prototype, "reduceRight");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Array.prototype.reduceRight;
+
+Array.prototype.reduceRight = "2010";
+
+var isWritable = (Array.prototype.reduceRight === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Array.prototype) {
+  if (prop === "reduceRight") {
+    isEnumerable = true;
+  }
+}
+
+delete Array.prototype.reduceRight;
+
+var isConfigurable = !Array.prototype.hasOwnProperty("reduceRight");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js
new file mode 100644
index 0000000000..5e00e1db4f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-621.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-621
+description: >
+    ES5 Attributes - all attributes in String.prototype.trim are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(String.prototype, "trim");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = String.prototype.trim;
+
+String.prototype.trim = "2010";
+
+var isWritable = (String.prototype.trim === "2010");
+
+var isEnumerable = false;
+
+for (var prop in String.prototype) {
+  if (prop === "trim") {
+    isEnumerable = true;
+  }
+}
+
+delete String.prototype.trim;
+
+var isConfigurable = !String.prototype.hasOwnProperty("trim");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js
new file mode 100644
index 0000000000..db59aba810
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-622.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-622
+description: ES5 Attributes - all attributes in Date.now are correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Date, "now");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Date.now;
+
+Date.now = "2010";
+
+var isWritable = (Date.now === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Date) {
+  if (prop === "now") {
+    isEnumerable = true;
+  }
+}
+
+delete Date.now;
+
+var isConfigurable = !Date.hasOwnProperty("now");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js
new file mode 100644
index 0000000000..a5c94f29b7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-623.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-623
+description: >
+    ES5 Attributes - all attributes in Date.prototype.toISOString are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Date.prototype, "toISOString");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Date.prototype.toISOString;
+
+Date.prototype.toISOString = "2010";
+
+var isWritable = (Date.prototype.toISOString === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Date.prototype) {
+  if (prop === "toISOString") {
+    isEnumerable = true;
+  }
+}
+
+delete Date.prototype.toISOString;
+
+var isConfigurable = !Date.prototype.hasOwnProperty("toISOString");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js
new file mode 100644
index 0000000000..4774991788
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-624.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-624
+description: >
+    ES5 Attributes - all attributes in Date.prototype.toJSON are
+    correct
+---*/
+
+var desc = Object.getOwnPropertyDescriptor(Date.prototype, "toJSON");
+
+var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);
+
+var temp = Date.prototype.toJSON;
+
+Date.prototype.toJSON = "2010";
+
+var isWritable = (Date.prototype.toJSON === "2010");
+
+var isEnumerable = false;
+
+for (var prop in Date.prototype) {
+  if (prop === "toJSON") {
+    isEnumerable = true;
+  }
+}
+
+delete Date.prototype.toJSON;
+
+var isConfigurable = !Date.prototype.hasOwnProperty("toJSON");
+
+assert(propertyAreCorrect, 'propertyAreCorrect !== true');
+assert(isWritable, 'isWritable !== true');
+assert.sameValue(isEnumerable, false, 'isEnumerable');
+assert(isConfigurable, 'isConfigurable !== true');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-625gs.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-625gs.js
new file mode 100644
index 0000000000..683458e946
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-625gs.js
@@ -0,0 +1,26 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-625gs
+description: >
+    Globally declared variable should take precedence over
+    Object.prototype property of the same name
+---*/
+
+Object.defineProperty(Object.prototype,
+  "prop",
+  {
+    value: 1001,
+    writable: false,
+    enumerable: false,
+    configurable: false
+  }
+);
+var prop = 1002;
+
+if (!(this.hasOwnProperty("prop") && prop === 1002)) {
+  throw "this.prop should take precedence over Object.prototype.prop";
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js
new file mode 100644
index 0000000000..feaf556cef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-63.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-63
+description: >
+    Object.defineProperty - both desc.value and name.value are NaN
+    (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: NaN
+});
+
+Object.defineProperty(obj, "foo", {
+  value: NaN
+});
+
+assert.sameValue(obj.foo, NaN);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js
new file mode 100644
index 0000000000..d627e8a13f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-64.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-64
+description: >
+    Object.defineProperty - desc.value = +0 and name.value = -0
+    (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: -0
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: +0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+
+  verifyEqualTo(obj, "foo", -0);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js
new file mode 100644
index 0000000000..ed2ac2cc12
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-65.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-65
+description: >
+    Object.defineProperty - desc.value = -0 and name.value = +0
+    (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: +0
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: -0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", +0);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js
new file mode 100644
index 0000000000..87fe39bdbd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-66.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-66
+description: >
+    Object.defineProperty - desc.value and name.value are two numbers
+    with different values (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+obj.foo = 101; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: 102
+});
+verifyEqualTo(obj, "foo", 102);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js
new file mode 100644
index 0000000000..6778b65e76
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-67.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-67
+description: >
+    Object.defineProperty - both desc.value and name.value are two
+    strings which have same length and same characters in
+    corresponding positions (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: "abcd"
+});
+
+Object.defineProperty(obj, "foo", {
+  value: "abcd"
+});
+verifyEqualTo(obj, "foo", "abcd");
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js
new file mode 100644
index 0000000000..f3f74ca0b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-68.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-68
+description: >
+    Object.defineProperty - desc.value and name.value are two strings
+    with different values (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+obj.foo = "abcd"; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: "fghj"
+});
+verifyEqualTo(obj, "foo", "fghj");
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js
new file mode 100644
index 0000000000..39244aa40a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-69.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-69
+description: >
+    Object.defineProperty - both desc.value and name.value are boolean
+    values with the same value (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: true
+});
+
+Object.defineProperty(obj, "foo", {
+  value: true
+});
+verifyEqualTo(obj, "foo", true);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-7.js
new file mode 100644
index 0000000000..5bc108b476
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-7.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 7a of [[DefineOwnProperty]] rejects if
+    current.[[Configurable]] is false and desc.[[Configurable]] is true.
+es5id: 15.2.3.6-4-7
+description: >
+    Object.defineProperty throws TypeError when changing
+    [[Configurable]] from false to true
+---*/
+
+var o = {};
+
+// create a data valued property; all other attributes default to false.
+var d1 = {
+  value: 101,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+var desc = {
+  value: 101,
+  configurable: true
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js
new file mode 100644
index 0000000000..24d4977637
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-70.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-70
+description: >
+    Object.defineProperty - desc.value and name.value are two boolean
+    values with different values (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+obj.foo = true; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+Object.defineProperty(obj, "foo", {
+  value: false
+});
+verifyEqualTo(obj, "foo", false);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js
new file mode 100644
index 0000000000..c12aa123b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-71.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-71
+description: >
+    Object.defineProperty - both desc.value and name.value are Ojbects
+    which refer to the same Object (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+var obj1 = {
+  length: 10
+};
+
+Object.defineProperty(obj, "foo", {
+  value: obj1
+});
+
+Object.defineProperty(obj, "foo", {
+  value: obj1
+});
+verifyEqualTo(obj, "foo", obj1);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js
new file mode 100644
index 0000000000..36c4fe3a34
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-72.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-72
+description: >
+    Object.defineProperty - desc.value and name.value are two Ojbects
+    which refer to the different objects (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+var obj1 = {
+  length: 10
+};
+obj.foo = obj1; // default value of attributes: writable: true, configurable: true, enumerable: true
+
+var obj2 = {
+  length: 20
+};
+
+Object.defineProperty(obj, "foo", {
+  value: obj2
+});
+verifyEqualTo(obj, "foo", obj2);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js
new file mode 100644
index 0000000000..e003f7060f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-73.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-73
+description: >
+    Object.defineProperty - both desc.writable and name.writable are
+    boolean values with the same value (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  writable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  writable: false
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js
new file mode 100644
index 0000000000..735ff9e36d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-74.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-74
+description: >
+    Object.defineProperty - desc.writable and name.writable are two
+    boolean values with different values (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  writable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  writable: true
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js
new file mode 100644
index 0000000000..ffb8fa59fc
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-75.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-75
+description: >
+    Object.defineProperty - both desc.[[Get]] and name.[[Get]] are two
+    objects which refer to the same object (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+function setFunc(value) {
+  obj.helpVerifySet = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc
+});
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc
+});
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyWritable(obj, "foo", "helpVerifySet");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js
new file mode 100644
index 0000000000..91a011f019
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-76.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-76
+description: >
+    Object.defineProperty - desc.[[Get]] and name.[[Get]] are two
+    objects which refer to the different objects (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc1() {
+  return 10;
+}
+
+function setFunc1(value) {
+  obj.helpVerifySet = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc1,
+  set: setFunc1,
+  configurable: true
+});
+
+function getFunc2() {
+  return 20;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc2
+});
+verifyEqualTo(obj, "foo", getFunc2());
+
+verifyWritable(obj, "foo", "helpVerifySet");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js
new file mode 100644
index 0000000000..11813c0338
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-77.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-77
+description: >
+    Object.defineProperty - both desc.[[Set]] and name.[[Set]] are two
+    objects which refer to the same object (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc
+});
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc
+});
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js
new file mode 100644
index 0000000000..9ffdeb435b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-78.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-78
+description: >
+    Object.defineProperty - desc.[[Set]] and name.[[Set]] are two
+    objects which refer to the different objects (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function setFunc1() {}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc1,
+  configurable: true
+});
+
+function setFunc2(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc2
+});
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js
new file mode 100644
index 0000000000..0295f90eef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-79.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-79
+description: >
+    Object.defineProperty - both desc.enumerable and name.enumerable
+    are boolean values with the same value (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-8.js
new file mode 100644
index 0000000000..42f3d2045c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-8.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 7b of [[DefineOwnProperty]] rejects if
+    current.[[Enumerable]] and desc.[[Enumerable]] are the boolean negations
+    of each other.
+es5id: 15.2.3.6-4-8
+description: >
+    Object.defineProperty throws TypeError when changing
+    [[Enumerable]] from false to true on non-configurable data
+    properties
+---*/
+
+var o = {};
+
+// create a data valued property; all other attributes default to false.
+var d1 = {
+  value: 101,
+  enumerable: false,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, setting enumerable to true should fail, since [[Configurable]]
+// on the original property will be false.
+var desc = {
+  value: 101,
+  enumerable: true
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.enumerable, false, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js
new file mode 100644
index 0000000000..06c6f05859
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-80.js
@@ -0,0 +1,31 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-80
+description: >
+    Object.defineProperty - desc.enumerable and name.enumerable are
+    boolean negation of each other (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: true
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js
new file mode 100644
index 0000000000..bb04cb882d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-81.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-81
+description: >
+    Object.defineProperty - both desc.configurable and
+    name.configurable are booleans with the same value (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  configurable: false
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js
new file mode 100644
index 0000000000..b2a9b4b8ae
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-1.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-1
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which only contains [[Enumerable]]
+    attribute as false, 'name' property is a data property (8.12.9
+    step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false
+});
+
+verifyEqualTo(obj, "foo", 1001);
+
+verifyWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js
new file mode 100644
index 0000000000..4c2395e14d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-10.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-10
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [[Enumerable]]
+    attribute as true and [[Configurable]] attribute is false, 'name'
+    property is an accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "foo", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", get_func());
+
+verifyWritable(obj, "foo", "verifySetFunction");
+
+verifyEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js
new file mode 100644
index 0000000000..0fefd5de68
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-11.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-11
+description: >
+    Object.defineProperty - Update [[Enumerable]] and [[Configurable]]
+    attributes of 'name' property to false successfully when
+    [[Enumerable]] and [[Configurable]] attributes of 'name' property
+    are true,  the 'desc' is a generic descriptor which contains
+    [[Enumerable]] and [[Configurable]] attributes as false, 'name'
+    property is an accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "foo", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", get_func());
+
+verifyWritable(obj, "foo", "verifySetFunction");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js
new file mode 100644
index 0000000000..ba8dd041b1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-12.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-12
+description: >
+    Object.defineProperty - Update [[Enumerable]] attributes of 'name'
+    property to true successfully when [[Enumerable]] attribute of
+    'name' is false and [[Configurable]] attribute of 'name' is true,
+    the 'desc' is a generic descriptor which only contains
+    [[Enumerable]] attribute as true, 'name' property is an accessor
+    property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "foo", {
+  get: get_func,
+  set: set_func,
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: true
+});
+
+verifyEqualTo(obj, "foo", get_func());
+
+verifyWritable(obj, "foo", "verifySetFunction");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js
new file mode 100644
index 0000000000..4e954f0939
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-13.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-13
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which only contains [[Enumerable]]
+    attribute as false, 'name' property is an index data property
+    (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: false
+});
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js
new file mode 100644
index 0000000000..b91f538d57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-14.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-14
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [[Enumerable]]
+    attribute as false and [[Configurable]] attribute as true, 'name'
+    property is an index data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: false,
+  configurable: true
+});
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js
new file mode 100644
index 0000000000..5a88b4781c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-15.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-15
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Configurable]]
+    attribute of 'name' property is true,  the 'desc' is a generic
+    descriptor which contains [[Configurable]] attribute as false,
+    'name' property is an index data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  configurable: false
+});
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyWritable(obj, "0");
+
+verifyEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js
new file mode 100644
index 0000000000..fe07c56e74
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-16.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-16
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [[Enumerable]]
+    attribute as true and [[Configurable]] attribute as false, 'name'
+    property is an index data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyWritable(obj, "0");
+
+verifyEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js
new file mode 100644
index 0000000000..de43ae8048
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-17.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-17
+description: >
+    Object.defineProperty - Update [[Enumerable]] and [[Configurable]]
+    attributes of 'name' property to false successfully when
+    [[Enumerable]] and [[Configurable]] attributes of 'name' property
+    are true, the 'desc' is a generic descriptor which contains
+    [[Enumerable]] and [[Configurable]] attributes as false, 'name'
+    property is an index data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyWritable(obj, "0");
+
+verifyNotEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js
new file mode 100644
index 0000000000..30b44c922c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-18.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-18
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to true successfully when [[Enumerable]] attribute of
+    'name' is false and [[Configurable]] attribute of 'name' is true,
+    the 'desc' is a generic descriptor which only contains
+    [[Enumerable]] attribute as true, 'name' property is an index data
+    property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "0", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: true
+});
+
+verifyEqualTo(obj, "0", 1001);
+
+verifyWritable(obj, "0");
+
+verifyEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js
new file mode 100644
index 0000000000..b8776f7da0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-19.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-19
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which only contains [Enumerable]]
+    attribute as false and 'name' property is an index accessor
+    property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: false
+});
+
+verifyEqualTo(obj, "0", get_func());
+
+verifyWritable(obj, "0", "verifySetFunction");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js
new file mode 100644
index 0000000000..e5093aeec7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-2.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-2
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [[Enumerable]]
+    attribute as false and [[Configurable]] attribute as true, 'name'
+    property is a data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true
+});
+
+verifyEqualTo(obj, "foo", 1001);
+
+verifyWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js
new file mode 100644
index 0000000000..4b4ee70a99
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-20.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-20
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [Enumerable]]
+    attribute as false and [[Configurable]] property is true, 'name'
+    property is an index accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: false,
+  configurable: true
+});
+
+verifyEqualTo(obj, "0", get_func());
+
+verifyWritable(obj, "0", "verifySetFunction");
+
+verifyNotEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js
new file mode 100644
index 0000000000..f4d984ef54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-21.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-21
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which only contains
+    [[Configurable]] attribute as false, 'name' property is an index
+    accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  configurable: false
+});
+
+verifyEqualTo(obj, "0", get_func());
+
+verifyWritable(obj, "0", "verifySetFunction");
+
+verifyEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js
new file mode 100644
index 0000000000..4df84cf130
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-22.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-22
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [[Enumerable]]
+    attribute as true and [[Configurable]] attribute is false, 'name'
+    property is an index accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(obj, "0", get_func());
+
+verifyWritable(obj, "0", "verifySetFunction");
+
+verifyEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js
new file mode 100644
index 0000000000..a313d8ed02
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-23.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-23
+description: >
+    Object.defineProperty - Update [[Enumerable]] and [[Configurable]]
+    attributes of 'name' property to false successfully when
+    [[Enumerable]] and [[Configurable]] attributes of 'name' property
+    are true,  the 'desc' is a generic descriptor which contains
+    [[Enumerable]] and [[Configurable]] attributes as false, 'name'
+    property is an index accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(obj, "0", get_func());
+
+verifyWritable(obj, "0", "verifySetFunction");
+
+verifyNotEnumerable(obj, "0");
+
+verifyNotConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js
new file mode 100644
index 0000000000..fd2e6d537b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-24.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-24
+description: >
+    Object.defineProperty - Update [[Enumerable]] attributes of 'name'
+    property to true successfully when [[Enumerable]] attribute of
+    'name' is false and [[Configurable]] attribute of 'name' is true,
+    the 'desc' is a generic descriptor which only contains
+    [[Enumerable]] attribute as true, 'name' property is an index
+    accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "0", {
+  get: get_func,
+  set: set_func,
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "0", {
+  enumerable: true
+});
+
+verifyEqualTo(obj, "0", get_func());
+
+verifyWritable(obj, "0", "verifySetFunction");
+
+verifyEnumerable(obj, "0");
+
+verifyConfigurable(obj, "0");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js
new file mode 100644
index 0000000000..f031e54a38
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-3.js
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-3
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Configurable]]
+    attribute of 'name' property is true,  the 'desc' is a generic
+    descriptor which contains [[Configurable]] attribute as false,
+    'name' property is a data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", 1001);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js
new file mode 100644
index 0000000000..9e6bd3600a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-4.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-4
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [[Enumerable]]
+    attribute as true and [[Configurable]] attribute as false, 'name'
+    property is a data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: true,
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", 1001);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js
new file mode 100644
index 0000000000..d0dae554c5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-5.js
@@ -0,0 +1,39 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-5
+description: >
+    Object.defineProperty - Update [[Enumerable]] and [[Configurable]]
+    attributes of 'name' property to false successfully when
+    [[Enumerable]] and [[Configurable]] attributes of 'name' property
+    are true, the 'desc' is a generic descriptor which contains
+    [[Enumerable]] and [[Configurable]] attributes as false, 'name'
+    property is a data property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false,
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", 1001);
+
+verifyWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js
new file mode 100644
index 0000000000..265df4a1bb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-6.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-6
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to true successfully when [[Enumerable]] attribute of
+    'name' is false and [[Configurable]] attribute of 'name' is true,
+    the 'desc' is a generic descriptor which only contains
+    [[Enumerable]] attribute as true, 'name' property is a data
+    property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 1001,
+  writable: true,
+  enumerable: false,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: true
+});
+
+verifyEqualTo(obj, "foo", 1001);
+
+verifyWritable(obj, "foo");
+
+verifyEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js
new file mode 100644
index 0000000000..72e6355d42
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-7.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-7
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which only contains [Enumerable]]
+    attribute as false and 'name' property is an accessor property
+    (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "foo", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false
+});
+
+verifyEqualTo(obj, "foo", get_func());
+
+verifyWritable(obj, "foo", "verifySetFunction");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js
new file mode 100644
index 0000000000..1238652846
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-8.js
@@ -0,0 +1,45 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-8
+description: >
+    Object.defineProperty - Update [[Enumerable]] attribute of 'name'
+    property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which contains [Enumerable]]
+    attribute as false and [[Configurable]] property is true, 'name'
+    property is an accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "foo", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  enumerable: false,
+  configurable: true
+});
+
+verifyEqualTo(obj, "foo", get_func());
+
+verifyWritable(obj, "foo", "verifySetFunction");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js
new file mode 100644
index 0000000000..7f7b8b7a1d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82-9.js
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82-9
+description: >
+    Object.defineProperty - Update [[Configurable]] attribute of
+    'name' property to false successfully when [[Enumerable]] and
+    [[Configurable]] attributes of 'name' property are true,  the
+    'desc' is a generic descriptor which only contains
+    [[Configurable]] attribute as false, 'name' property is an
+    accessor property (8.12.9 step 8)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+obj.verifySetFunction = "data";
+var get_func = function() {
+  return obj.verifySetFunction;
+};
+var set_func = function(value) {
+  obj.verifySetFunction = value;
+};
+Object.defineProperty(obj, "foo", {
+  get: get_func,
+  set: set_func,
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  configurable: false
+});
+
+verifyEqualTo(obj, "foo", get_func());
+
+verifyWritable(obj, "foo", "verifySetFunction");
+
+verifyEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js
new file mode 100644
index 0000000000..f80c1afff1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-82.js
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-82
+description: >
+    Object.defineProperty - desc.configurable and name.configurable
+    are boolean negation of each other (8.12.9 step 6)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  configurable: true
+});
+
+Object.defineProperty(obj, "foo", {
+  configurable: false
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js
new file mode 100644
index 0000000000..c9fb22b3d7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-83.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-83
+description: >
+    Object.defineProperty will not throw TypeError if
+    name.configurable = false, name.writable = false, name.value =
+    undefined and desc.value = undefined (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: undefined,
+  writable: false,
+  configurable: false
+});
+verifyEqualTo(obj, "foo", undefined);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js
new file mode 100644
index 0000000000..fdb49395ee
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-84.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-84
+description: >
+    Object.defineProperty will not throw TypeError if
+    name.configurable = false, name.writable = false, name.value =
+    null and desc.value = null (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: null,
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: null,
+  writable: false,
+  configurable: false
+});
+verifyEqualTo(obj, "foo", null);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js
new file mode 100644
index 0000000000..882a018143
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-85.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-85
+description: >
+    Object.defineProperty will not throw TypeError if
+    name.configurable = false, name.writable = false, name.value = NaN
+    and desc.value = NaN (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: NaN,
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: NaN,
+  writable: false,
+  configurable: false
+});
+
+assert.sameValue(obj.foo, NaN);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js
new file mode 100644
index 0000000000..1bf35f3460
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-86.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-86
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.writable = false, desc.value = +0 and name.value =
+    -0 (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: -0,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: +0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", -0);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js
new file mode 100644
index 0000000000..cbf3421f4e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-87.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-87
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.writable = false, desc.value = -0 and name.value =
+    +0 (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: +0,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: -0
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", +0);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js
new file mode 100644
index 0000000000..27b56ee337
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-88.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-88
+description: >
+    Object.defineProperty will not throw TypeError when
+    name.configurable = false, name.writable = false, desc.value and
+    name.value are two numbers with the same value (8.12.9 step
+    10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 100,
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: 100
+});
+verifyEqualTo(obj, "foo", 100);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js
new file mode 100644
index 0000000000..a8b3ba707f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-89.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-89
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.writable = false, desc.value and name.value are two
+    numbers with different values (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: 10,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: 20
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", 10);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-9.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-9.js
new file mode 100644
index 0000000000..82bc4ff57c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-9.js
@@ -0,0 +1,43 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
+    of O to define the property. Step 7b of [[DefineOwnProperty]] rejects if
+    current.[[Enumerable]] and desc.[[Enumerable]] are the boolean negations
+    of each other.
+es5id: 15.2.3.6-4-9
+description: >
+    Object.defineProperty throws TypeError when changing
+    [[Enumerable]] from true to false on non-configurable data
+    properties
+---*/
+
+var o = {};
+
+// create a data valued property with [[Enumerable]] explicitly set to true;
+// all other attributes default to false.
+var d1 = {
+  value: 101,
+  enumerable: true,
+  configurable: false
+};
+Object.defineProperty(o, "foo", d1);
+
+// now, setting enumerable to false should fail, since [[Configurable]]
+// on the original property will be false.
+var desc = {
+  value: 101,
+  enumerable: false
+};
+assert.throws(TypeError, function() {
+  Object.defineProperty(o, "foo", desc);
+});
+// the property should remain unchanged.
+var d2 = Object.getOwnPropertyDescriptor(o, "foo");
+assert.sameValue(d2.value, 101, 'd2.value');
+assert.sameValue(d2.enumerable, true, 'd2.enumerable');
+assert.sameValue(d2.configurable, false, 'd2.configurable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js
new file mode 100644
index 0000000000..07438a7406
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-90.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-90
+description: >
+    Object.defineProperty will not throw TypeError when
+    name.configurable = false, name.writable = false, desc.value and
+    name.value are two strings with the same value (8.12.9 step
+    10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: "abcd"
+});
+verifyEqualTo(obj, "foo", "abcd");
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js
new file mode 100644
index 0000000000..665ae48b79
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-91.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-91
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.writable = false, desc.value and name.value are two
+    strings with different values (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: "abcd",
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: "fghj"
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", "abcd");
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js
new file mode 100644
index 0000000000..780ad68e54
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-92.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-92
+description: >
+    Object.defineProperty will not throw TypeError when
+    name.configurable = false, name.writable = false, desc.value and
+    name.value are two booleans with the same value (8.12.9 step
+    10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: false,
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: false
+});
+verifyEqualTo(obj, "foo", false);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js
new file mode 100644
index 0000000000..27113a056f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-93.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-93
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.writable = false, desc.value and name.value are two
+    booleans with different values (8.12.9 step 10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+Object.defineProperty(obj, "foo", {
+  value: false,
+  writable: false,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: true
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", false);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js
new file mode 100644
index 0000000000..6a3a90950d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-94.js
@@ -0,0 +1,38 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-94
+description: >
+    Object.defineProperty will not throw TypeError when
+    name.configurable = false, name.writable = false, desc.value and
+    name.value are two Objects refer to the same object (8.12.9 step
+    10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+var obj1 = {
+  length: 10
+};
+
+Object.defineProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  value: obj1
+});
+verifyEqualTo(obj, "foo", obj1);
+
+verifyNotWritable(obj, "foo");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js
new file mode 100644
index 0000000000..9590be199b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-95.js
@@ -0,0 +1,51 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-95
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.writable = false, desc.value and name.value are two
+    objects which refer to the different objects (8.12.9 step
+    10.a.ii.1)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+var obj1 = {
+  length: 10
+};
+
+Object.defineProperty(obj, "foo", {
+  value: obj1,
+  writable: false,
+  configurable: false
+});
+
+var obj2 = {
+  length: 20
+};
+
+try {
+  Object.defineProperty(obj, "foo", {
+    value: obj2
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "foo", obj1);
+
+  verifyNotWritable(obj, "foo");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js
new file mode 100644
index 0000000000..6cc17c467e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-96.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-96
+description: >
+    Object.defineProperty will not throw TypeError when
+    name.configurable = false, both desc.[[Set]] and name.[[Set]] are
+    two objects which refer to the same object (8.12.9 step 11.a.i)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc
+});
+verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js
new file mode 100644
index 0000000000..6e3d07a24b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-97.js
@@ -0,0 +1,46 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-97
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.[[Set]] is undefined, desc.[[Set]] refers to an
+    object (8.12.9 step 11.a.i)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return "property";
+}
+
+Object.defineProperty(obj, "property", {
+  get: getFunc,
+  configurable: false
+});
+
+try {
+  Object.defineProperty(obj, "property", {
+    get: getFunc,
+    set: function() {},
+    configurable: false
+  });
+
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyEqualTo(obj, "property", getFunc());
+
+  verifyNotEnumerable(obj, "property");
+
+  verifyNotConfigurable(obj, "property");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js
new file mode 100644
index 0000000000..0b54b241d5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-98.js
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-98
+description: >
+    Object.defineProperty will not throw TypeError when
+    name.configurable = false, both desc.[[Get]] and name.[[Get]] are
+    two objects which refer to the same object (8.12.9 step 11.a.ii)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function getFunc() {
+  return 10;
+}
+
+function setFunc(value) {
+  obj.verifyGetHelpMethod = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc,
+  set: setFunc,
+  configurable: false
+});
+
+Object.defineProperty(obj, "foo", {
+  get: getFunc
+});
+
+verifyEqualTo(obj, "foo", getFunc());
+
+verifyWritable(obj, "foo", "verifyGetHelpMethod");
+
+verifyNotEnumerable(obj, "foo");
+
+verifyNotConfigurable(obj, "foo");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js
new file mode 100644
index 0000000000..bc8efa7208
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/15.2.3.6-4-99.js
@@ -0,0 +1,48 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6-4-99
+description: >
+    Object.defineProperty will throw TypeError when name.configurable
+    = false, name.[[Get]] is undefined, desc.[[Get]] refers to an
+    object (8.12.9 step 11.a.ii)
+includes: [propertyHelper.js]
+---*/
+
+
+var obj = {};
+
+function setFunc(value) {
+  obj.setVerifyHelpProp = value;
+}
+
+Object.defineProperty(obj, "foo", {
+  set: setFunc,
+  configurable: false
+});
+
+function getFunc() {
+  return 10;
+}
+
+try {
+  Object.defineProperty(obj, "foo", {
+    get: getFunc,
+    set: setFunc
+  });
+  throw new Test262Error("Expected an exception.");
+} catch (e) {
+  verifyWritable(obj, "foo", "setVerifyHelpProp");
+
+  verifyNotEnumerable(obj, "foo");
+
+  verifyNotConfigurable(obj, "foo");
+
+  if (!(e instanceof TypeError)) {
+    throw new Test262Error("Expected TypeError, got " + e);
+  }
+
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-b-i_1.js b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-b-i_1.js
new file mode 100644
index 0000000000..83670f1a5e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-b-i_1.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 8.12.9-9-b-i_1
+description: >
+    Redefine a configurable data property to be an accessor property
+    on a newly non-extensible object
+---*/
+
+var o = {};
+Object.defineProperty(o, "foo",
+{
+  value: "hello",
+  configurable: true
+});
+Object.preventExtensions(o);
+Object.defineProperty(o, "foo", {
+  get: function() {
+    return 5;
+  }
+});
+
+var fooDescrip = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(o.foo, 5, 'o.foo');
+assert(fooDescrip.get !== undefined, 'fooDescrip.get!==undefined !== true');
+assert.sameValue(fooDescrip.set, undefined, 'fooDescrip.set');
+assert.sameValue(fooDescrip.value, undefined, 'fooDescrip.value');
+assert.sameValue(fooDescrip.configurable, true, 'fooDescrip.configurable');
+assert.sameValue(fooDescrip.enumerable, false, 'fooDescrip.enumerable');
+assert.sameValue(fooDescrip.writable, undefined, 'fooDescrip.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-b-i_2.js b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-b-i_2.js
new file mode 100644
index 0000000000..143c79bf64
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-b-i_2.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 8.12.9-9-b-i_2
+description: >
+    Redefine a configurable data property to be an accessor property
+    on a newly non-extensible object
+---*/
+
+var o = {};
+Object.defineProperty(o, "foo",
+{
+  value: "hello",
+  configurable: true,
+  enumerable: true,
+  writable: true
+});
+Object.preventExtensions(o);
+Object.defineProperty(o, "foo", {
+  get: function() {
+    return 5;
+  }
+});
+
+var fooDescrip = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(o.foo, 5, 'o.foo');
+assert(fooDescrip.get !== undefined, 'fooDescrip.get!==undefined !== true');
+assert.sameValue(fooDescrip.set, undefined, 'fooDescrip.set');
+assert.sameValue(fooDescrip.value, undefined, 'fooDescrip.value');
+assert.sameValue(fooDescrip.configurable, true, 'fooDescrip.configurable');
+assert.sameValue(fooDescrip.enumerable, true, 'fooDescrip.enumerable');
+assert.sameValue(fooDescrip.writable, undefined, 'fooDescrip.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-c-i_1.js b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-c-i_1.js
new file mode 100644
index 0000000000..bae31d5774
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-c-i_1.js
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 8.12.9-9-c-i_1
+description: >
+    Redefine a configurable accessor property to be a data property on
+    a non-extensible object
+---*/
+
+var o = {};
+Object.defineProperty(o, "foo",
+{
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+Object.preventExtensions(o);
+Object.defineProperty(o, "foo", {
+  value: "hello"
+});
+
+var fooDescrip = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(o.foo, "hello", 'o.foo');
+assert.sameValue(fooDescrip.get, undefined, 'fooDescrip.get');
+assert.sameValue(fooDescrip.set, undefined, 'fooDescrip.set');
+assert.sameValue(fooDescrip.value, "hello", 'fooDescrip.value');
+assert.sameValue(fooDescrip.configurable, true, 'fooDescrip.configurable');
+assert.sameValue(fooDescrip.enumerable, false, 'fooDescrip.enumerable');
+assert.sameValue(fooDescrip.writable, false, 'fooDescrip.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-c-i_2.js b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-c-i_2.js
new file mode 100644
index 0000000000..76eb3119b6
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/8.12.9-9-c-i_2.js
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 8.12.9-9-c-i_2
+description: >
+    Redefine a configurable accessor property to be a data property on
+    a non-extensible object
+---*/
+
+var o = {};
+Object.defineProperty(o, "foo",
+{
+  get: function() {
+    return 5;
+  },
+  configurable: true
+});
+Object.preventExtensions(o);
+Object.defineProperty(o, "foo",
+{
+  value: "hello",
+  writable: true
+});
+
+var fooDescrip = Object.getOwnPropertyDescriptor(o, "foo");
+
+assert.sameValue(o.foo, "hello", 'o.foo');
+assert.sameValue(fooDescrip.get, undefined, 'fooDescrip.get');
+assert.sameValue(fooDescrip.set, undefined, 'fooDescrip.set');
+assert.sameValue(fooDescrip.value, "hello", 'fooDescrip.value');
+assert.sameValue(fooDescrip.configurable, true, 'fooDescrip.configurable');
+assert.sameValue(fooDescrip.enumerable, false, 'fooDescrip.enumerable');
+assert.sameValue(fooDescrip.writable, true, 'fooDescrip.writable');
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/S15.2.3.6_A1.js b/js/src/tests/test262/built-ins/Object/defineProperty/S15.2.3.6_A1.js
new file mode 100644
index 0000000000..e57b9345ff
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/S15.2.3.6_A1.js
@@ -0,0 +1,38 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If a particular API exists (document.createElement, as happens to
+    exist in a browser environment), check if the form objects it makes
+    obey the constraints that even host objects must obey. In this
+    case, that if defineProperty seems to have successfully installed a
+    non-configurable getter, that it is still there.
+es5id: 15.2.3.6_A1
+description: Do getters on HTMLFormElements disappear?
+---*/
+
+function getter() {
+  return 'gotten';
+}
+
+if (typeof document !== 'undefined' &&
+  typeof document.createElement === 'function') {
+  var f = document.createElement("form");
+  var refused = false;
+  try {
+    Object.defineProperty(f, 'foo', {
+      get: getter,
+      set: void 0
+    });
+  } catch (err) {
+    // A host object may refuse to install the getter
+    refused = true;
+  }
+  if (!refused) {
+    var desc = Object.getOwnPropertyDescriptor(f, 'foo');
+    assert.sameValue(desc.get, getter, 'The value of desc.get is expected to equal the value of getter');
+  }
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/S15.2.3.6_A2.js b/js/src/tests/test262/built-ins/Object/defineProperty/S15.2.3.6_A2.js
new file mode 100644
index 0000000000..ea75252e6d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/S15.2.3.6_A2.js
@@ -0,0 +1,26 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es5id: 15.2.3.6_A2
+description: >
+    Checks if an inherited accessor property appears to be  an own
+    property.
+---*/
+
+var base = {};
+var derived = Object.create(base);
+
+function getter() {
+  return 'gotten';
+}
+Object.defineProperty(base, 'foo', {
+  get: getter
+});
+
+assert(
+  !derived.hasOwnProperty('foo'),
+  'The value of !derived.hasOwnProperty("foo") is expected to be true'
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/browser.js b/js/src/tests/test262/built-ins/Object/defineProperty/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/browser.js
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/name.js b/js/src/tests/test262/built-ins/Object/defineProperty/name.js
new file mode 100644
index 0000000000..93e3066236
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/name.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2015 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es6id: 19.1.2.4
+description: >
+  Object.defineProperty.name is "defineProperty".
+info: |
+  Object.defineProperty ( O, P, Attributes )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Object.defineProperty.name, "defineProperty");
+
+verifyNotEnumerable(Object.defineProperty, "name");
+verifyNotWritable(Object.defineProperty, "name");
+verifyConfigurable(Object.defineProperty, "name");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js b/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js
new file mode 100644
index 0000000000..8c49a7085c
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/not-a-constructor.js
@@ -0,0 +1,35 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-ecmascript-standard-built-in-objects
+description: >
+  Object.defineProperty does not implement [[Construct]], is not new-able
+info: |
+  ECMAScript Function Objects
+
+  Built-in function objects that are not identified as constructors do not
+  implement the [[Construct]] internal method unless otherwise specified in
+  the description of a particular function.
+
+  sec-evaluatenew
+
+  ...
+  7. If IsConstructor(constructor) is false, throw a TypeError exception.
+  ...
+includes: [isConstructor.js]
+features: [Reflect.construct, arrow-function]
+---*/
+
+assert.sameValue(
+  isConstructor(Object.defineProperty),
+  false,
+  'isConstructor(Object.defineProperty) must return false'
+);
+
+assert.throws(TypeError, () => {
+  new Object.defineProperty({}, '', {});
+}, '`new Object.defineProperty({}, \'\', {})` throws TypeError');
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-bigint.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-bigint.js
new file mode 100644
index 0000000000..d9b55b268f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-bigint.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (bigint)
+info: |
+  Object.defineProperty ( O, P, Attributes )
+
+  ...
+  Let desc be ? ToPropertyDescriptor(Attributes).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+features: [BigInt]
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', 0n);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-false.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-false.js
new file mode 100644
index 0000000000..801a934006
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-false.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (false)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', false);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-null.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-null.js
new file mode 100644
index 0000000000..21daf0d268
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-null.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (null)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', null);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-number.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-number.js
new file mode 100644
index 0000000000..f9339187d0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-number.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (number)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', 1);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-string.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-string.js
new file mode 100644
index 0000000000..953c60f41f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-string.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (string)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', '');
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-symbol.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-symbol.js
new file mode 100644
index 0000000000..b1c491dd56
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-symbol.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (symbol)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+features: [Symbol]
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', Symbol());
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-true.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-true.js
new file mode 100644
index 0000000000..7c96153db7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-true.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (true)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', true);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-undefined.js b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-undefined.js
new file mode 100644
index 0000000000..8dc081ebd3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/property-description-must-be-an-object-not-undefined.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-object.defineproperty
+description: >
+  Property description must be an object (undefined)
+info: |
+  ObjectDefineProperties ( O, Properties )
+
+  ...
+  For each element nextKey of keys, do
+    Let propDesc be ? props.[[GetOwnProperty]](nextKey).
+    If propDesc is not undefined and propDesc.[[Enumerable]] is true, then
+    Let descObj be ? Get(props, nextKey).
+    Let desc be ? ToPropertyDescriptor(descObj).
+  ...
+
+  ToPropertyDescriptor ( Obj )
+
+  If Type(Obj) is not Object, throw a TypeError exception.
+  ...
+---*/
+
+assert.throws(TypeError, () => {
+  Object.defineProperty({}, 'a', undefined);
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/redefine-length-with-various-values-and-configurable-true.js b/js/src/tests/test262/built-ins/Object/defineProperty/redefine-length-with-various-values-and-configurable-true.js
new file mode 100644
index 0000000000..efb7dcf9be
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/redefine-length-with-various-values-and-configurable-true.js
@@ -0,0 +1,40 @@
+// Copyright (c) 2020 Rick Waldron.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array-exotic-objects-defineownproperty-p-desc
+description: >
+  Redefining "length" to `configurable: true` throws a TypeError exception
+info: |
+  ArraySetLength ( A, Desc )
+
+  ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
+---*/
+
+let a = [1];
+
+assert.throws(TypeError, () => {
+  Object.defineProperty(a, "length", {
+    configurable: true
+  });
+});
+assert.throws(TypeError, () => {
+  Object.defineProperty(a, "length", {
+    value: 1,
+    configurable: true
+  });
+});
+assert.throws(TypeError, () => {
+  Object.defineProperty(a, "length", {
+    value: 2,
+    configurable: true
+  });
+});
+assert.throws(TypeError, () => {
+  Object.defineProperty(a, "length", {
+    value: 3,
+    configurable: true
+  });
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/shell.js b/js/src/tests/test262/built-ins/Object/defineProperty/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/shell.js
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-configurable.js b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-configurable.js
new file mode 100644
index 0000000000..b0b381fb8f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-configurable.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2013 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 19.1.2.4
+description: >
+    Symbol used as property for configurable data property definition
+features: [Symbol]
+includes: [propertyHelper.js]
+---*/
+var sym = Symbol();
+var obj = {};
+
+
+Object.defineProperty(obj, sym, {
+  value: 1,
+  configurable: true
+});
+
+assert.sameValue(sym in obj, true, "The result of `sym in obj` is `true`");
+verifyProperty(obj, sym, {
+  value: 1,
+  configurable: true,
+  writable: false,
+  enumerable: false,
+});
+
+assert.sameValue(
+  Object.prototype.propertyIsEnumerable.call(obj, sym),
+  false,
+  "`Object.prototype.propertyIsEnumerable.call(obj, sym)` returns `false`"
+);
+
+assert.sameValue(delete obj[sym], true, "The result of `delete obj[sym]` is `true`");
+
+assert.sameValue(
+  Object.getOwnPropertyDescriptor(obj, sym),
+  undefined,
+  "`Object.getOwnPropertyDescriptor(obj, sym)` returns `undefined`"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-default-non-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-default-non-strict.js
new file mode 100644
index 0000000000..ce9d9cc91f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-default-non-strict.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2013 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 19.1.2.4
+description: >
+    Symbol used as property for property definition
+flags: [noStrict]
+features: [Symbol]
+includes: [propertyHelper.js]
+---*/
+var sym = Symbol();
+var obj = {};
+
+
+Object.defineProperty(obj, sym, {
+  value: 1,
+});
+
+assert.sameValue(sym in obj, true, "The result of `sym in obj` is `true`");
+verifyProperty(obj, sym, {
+  value: 1,
+  configurable: false,
+  writable: false,
+  enumerable: false,
+});
+
+assert.sameValue(
+  Object.prototype.propertyIsEnumerable.call(obj, sym),
+  false,
+  "`Object.prototype.propertyIsEnumerable.call(obj, sym)` returns `false`"
+);
+
+assert.sameValue(delete obj[sym], false, "The result of `delete obj[sym]` is `false`");
+
+assert.notSameValue(
+  Object.getOwnPropertyDescriptor(obj, sym),
+  undefined,
+  "`Object.getOwnPropertyDescriptor(obj, sym)` does not return `undefined`"
+);
+
+obj[sym] = 2;
+
+assert.sameValue(obj[sym], 1, "The value of `obj[sym]` is `1`");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-default-strict-strict.js b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-default-strict-strict.js
new file mode 100644
index 0000000000..9e6e7a4b81
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-default-strict-strict.js
@@ -0,0 +1,50 @@
+'use strict';
+// Copyright (C) 2013 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 19.1.2.4
+description: >
+    Symbol used as property for default data property definition
+flags: [onlyStrict]
+features: [Symbol]
+includes: [propertyHelper.js]
+---*/
+var sym = Symbol();
+var obj = {};
+
+
+Object.defineProperty(obj, sym, {
+  value: 1,
+});
+
+assert.sameValue(sym in obj, true, "The result of `sym in obj` is `true`");
+verifyProperty(obj, sym, {
+  value: 1,
+  configurable: false,
+  writable: false,
+  enumerable: false,
+});
+
+assert.sameValue(
+  Object.prototype.propertyIsEnumerable.call(obj, sym),
+  false,
+  "`Object.prototype.propertyIsEnumerable.call(obj, sym)` returns `false`"
+);
+
+assert.throws(TypeError, function() {
+  delete obj[sym];
+});
+
+assert.notSameValue(
+  Object.getOwnPropertyDescriptor(obj, sym),
+  undefined,
+  "`Object.getOwnPropertyDescriptor(obj, sym)` does not return `undefined`"
+);
+
+assert.throws(TypeError, function() {
+  obj[sym] = 2;
+});
+
+assert.sameValue(obj[sym], 1, "The value of `obj[sym]` is `1`");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-writable.js b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-writable.js
new file mode 100644
index 0000000000..1d8436bf15
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/defineProperty/symbol-data-property-writable.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2013 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 19.1.2.4
+description: >
+    Symbol used as property for writable data property definition
+features: [Symbol]
+includes: [propertyHelper.js]
+---*/
+var sym = Symbol();
+var obj = {};
+
+
+Object.defineProperty(obj, sym, {
+  value: 1,
+  writable: true
+});
+
+assert.sameValue(sym in obj, true, "The result of `sym in obj` is `true`");
+verifyProperty(obj, sym, {
+  value: 1,
+  configurable: false,
+  writable: true,
+  enumerable: false,
+});
+
+assert.sameValue(
+  Object.prototype.propertyIsEnumerable.call(obj, sym),
+  false,
+  "`Object.prototype.propertyIsEnumerable.call(obj, sym)` returns `false`"
+);
+
+obj[sym] = 2;
+
+assert.sameValue(obj[sym], 2, "The value of `obj[sym]` is `2`");
+
+reportCompare(0, 0);