1 files changed, 42 insertions, 0 deletions
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
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+++ 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);