1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-31.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-31.js
new file mode 100644
index 0000000000..7c4c6a233a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-5-31.js
@@ -0,0 +1,16 @@
+// 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 - 'fromIndex' is a positive
+    non-integer, verify truncation occurs in the proper direction
+---*/
+
+var targetObj = {};
+
+assert.sameValue([0, targetObj, true].lastIndexOf(targetObj, 1.5), 1, '[0, targetObj, true].lastIndexOf(targetObj, 1.5)');
+assert.sameValue([0, true, targetObj].lastIndexOf(targetObj, 1.5), -1, '[0, true, targetObj].lastIndexOf(targetObj, 1.5)');
+
+reportCompare(0, 0);