1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-1.js
new file mode 100644
index 0000000000..87cd27ba3b
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/reduceRight/15.4.4.22-9-1.js
@@ -0,0 +1,23 @@
+// 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.reduceright
+description: >
+    Array.prototype.reduceRight doesn't consider new elements which
+    index is larger than array original length added to array after it
+    is called, consider new elements which index is smaller than array
+    length
+---*/
+
+function callbackfn(prevVal, curVal, idx, obj) {
+  arr[5] = 6;
+  arr[2] = 3;
+  return prevVal + curVal;
+}
+
+var arr = ['1', 2, , 4, '5'];
+
+assert.sameValue(arr.reduceRight(callbackfn), "54321", 'arr.reduceRight(callbackfn)');
+
+reportCompare(0, 0);