1 files changed, 46 insertions, 0 deletions
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);