1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/ch08/8.12/8.12.5/8.12.5-3-b_1.js b/js/src/tests/test262/ch08/8.12/8.12.5/8.12.5-3-b_1.js
new file mode 100644
index 000000000..0ed875ef4
--- /dev/null
+++ b/js/src/tests/test262/ch08/8.12/8.12.5/8.12.5-3-b_1.js
@@ -0,0 +1,40 @@
+/// Copyright (c) 2012 Ecma International.  All rights reserved. 
+/// Ecma International makes this code available under the terms and conditions set
+/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
+/// "Use Terms").   Any redistribution of this code must retain the above 
+/// copyright and this notice and otherwise comply with the Use Terms.
+/**
+ * @path ch08/8.12/8.12.5/8.12.5-3-b_1.js
+ * @description Changing the value of a data property should not affect it's non-value property descriptor attributes.
+ */
+
+
+function testcase() {
+    var origReduce = Array.prototype.reduce;
+    var origDesc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");
+    var newDesc;
+    
+    try {
+        Array.prototype.reduce = function () {;};
+        newDesc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");
+        var descArray = [origDesc, newDesc];
+        
+        for (var j in descArray) {  //Ensure no attributes are magically added to newDesc
+            for (var i in descArray[j]) {
+                if (i==="value") {
+                    if (origDesc[i]===newDesc[i]) {
+                        return false;
+                    }
+                }
+                else if (origDesc[i]!==newDesc[i]) {
+                    return false;
+                }
+            }
+        }
+        return true;        
+    
+    } finally {
+        Array.prototype.reduce = origReduce;
+    }
+}
+runTestCase(testcase);