1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-2.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-2.js
new file mode 100644
index 0000000000..bd64d700ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-2.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.lastindexof
+description: Array.prototype.lastIndexOf must return correct index(Number)
+---*/
+
+var obj = {
+  toString: function() {
+    return 0
+  }
+};
+var one = 1;
+var _float = -(4 / 3);
+var a = new Array(+0, true, 0, -0, false, undefined, null, "0", obj, _float, -(4 / 3), -1.3333333333333, "str", one, 1, false);
+
+assert.sameValue(a.lastIndexOf(-(4 / 3)), 10, 'a[10]=-(4/3)');
+assert.sameValue(a.lastIndexOf(0), 3, 'a[3] = -0, but using === -0 and 0 are equal');
+assert.sameValue(a.lastIndexOf(-0), 3, 'a[3] = -0');
+assert.sameValue(a.lastIndexOf(1), 14, 'a[14] = 1');
+
+reportCompare(0, 0);