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1 files changed, 15 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-5.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-5.js
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--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-5.js
@@ -0,0 +1,15 @@
+// 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.lastindexof
+description: Array.prototype.lastIndexOf when fromIndex is null
+---*/
+
+var a = new Array(1, 2, 1);
+
+// null resolves to 0
+assert.sameValue(a.lastIndexOf(2, null), -1, 'a.lastIndexOf(2,null)');
+assert.sameValue(a.lastIndexOf(1, null), 0, 'a.lastIndexOf(1,null)');
+
+reportCompare(0, 0);