1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-b-iii-3-b-1.js b/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-b-iii-3-b-1.js
new file mode 100644
index 0000000000..213a63acc5
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/15.4.4.4-5-b-iii-3-b-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.
+
+/*---
+esid: sec-array.prototype.concat
+description: >
+    Array.prototype.concat will concat an Array when index property
+    (read-only) exists in Array.prototype (Step 5.b.iii.3.b)
+includes: [propertyHelper.js]
+---*/
+
+Object.defineProperty(Array.prototype, "0", {
+  value: 100,
+  writable: false,
+  configurable: true
+});
+
+var oldArr = [101];
+var newArr = Array.prototype.concat.call(oldArr);
+
+verifyProperty(newArr, "0", {
+  value: 101,
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);