1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-1.js
new file mode 100644
index 0000000000..749f146c19
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-1.js
@@ -0,0 +1,25 @@
+// 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 - callbackfn not called for indexes never
+    been assigned values
+---*/
+
+var callCnt = 0;
+
+function callbackfn(prevVal, curVal, idx, obj)
+{
+  callCnt++;
+  return curVal;
+}
+
+var arr = new Array(10);
+arr[0] = arr[1] = undefined; //explicitly assigning a value
+
+assert.sameValue(arr.reduce(callbackfn), undefined, 'arr.reduce(callbackfn)');
+assert.sameValue(callCnt, 1, 'callCnt');
+
+reportCompare(0, 0);