1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-1.js
new file mode 100644
index 0000000000..ab069463b9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-10-1.js
@@ -0,0 +1,24 @@
+// 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.reduce
+description: >
+    Array.prototype.reduce doesn't mutate the Array on which it is
+    called on
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  return 1;
+}
+var srcArr = [1, 2, 3, 4, 5];
+srcArr.reduce(callbackfn);
+
+assert.sameValue(srcArr[0], 1, 'srcArr[0]');
+assert.sameValue(srcArr[1], 2, 'srcArr[1]');
+assert.sameValue(srcArr[2], 3, 'srcArr[2]');
+assert.sameValue(srcArr[3], 4, 'srcArr[3]');
+assert.sameValue(srcArr[4], 5, 'srcArr[4]');
+
+reportCompare(0, 0);