1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-1.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-1.js
new file mode 100644
index 0000000000..eaa3df340e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-9-1.js
@@ -0,0 +1,29 @@
+// 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 returns -1 for elements not present
+---*/
+
+var a = new Array();
+a[100] = 1;
+a[99999] = "";
+a[10] = new Object();
+a[5555] = 5.5;
+a[123456] = "str";
+a[5] = 1E+309;
+
+assert.sameValue(a.lastIndexOf(1), 100, 'a.lastIndexOf(1)');
+assert.sameValue(a.lastIndexOf(""), 99999, 'a.lastIndexOf("")');
+assert.sameValue(a.lastIndexOf("str"), 123456, 'a.lastIndexOf("str")');
+assert.sameValue(a.lastIndexOf(5.5), 5555, 'a.lastIndexOf(5.5)');
+assert.sameValue(a.lastIndexOf(1E+309), 5, 'a.lastIndexOf(1E+309)');
+
+assert.sameValue(a.lastIndexOf(true), -1, 'a.lastIndexOf(true)');
+assert.sameValue(a.lastIndexOf(5), -1, 'a.lastIndexOf(5)');
+assert.sameValue(a.lastIndexOf("str1"), -1, 'a.lastIndexOf("str1")');
+assert.sameValue(a.lastIndexOf(null), -1, 'a.lastIndexOf(null)');
+assert.sameValue(a.lastIndexOf(new Object()), -1, 'a.lastIndexOf(new Object())');
+
+reportCompare(0, 0);