1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-16.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-16.js
new file mode 100644
index 0000000000..8c47a71c1f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-9-b-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.
+
+/*---
+esid: sec-array.prototype.filter
+es5id: 15.4.4.20-9-b-16
+description: >
+    Array.prototype.filter - decreasing length of array does not
+    delete non-configurable properties
+flags: [noStrict]
+---*/
+
+function callbackfn(val, idx, obj) {
+  return true;
+}
+
+var arr = [0, 1, 2];
+
+Object.defineProperty(arr, "2", {
+  get: function() {
+    return "unconfigurable";
+  },
+  configurable: false
+});
+
+Object.defineProperty(arr, "1", {
+  get: function() {
+    arr.length = 2;
+    return 1;
+  },
+  configurable: true
+});
+
+var newArr = arr.filter(callbackfn);
+
+assert.sameValue(newArr.length, 3, 'newArr.length');
+assert.sameValue(newArr[2], "unconfigurable", 'newArr[2]');
+
+reportCompare(0, 0);