1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js
new file mode 100644
index 0000000000..6ee21c9d7a
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js
@@ -0,0 +1,18 @@
+// Copyright 2016 The V8 project authors. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+  Return +0 when fromIndex is -0 and return index refers to the first position
+info: |
+  22.1.3.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+
+  ...
+  5. If n ≥ 0, then
+    a. If n is -0, let k be +0; else let k be min(n, len - 1).
+  ...
+---*/
+
+assert.sameValue(1 / [true].lastIndexOf(true, -0), +Infinity);
+
+reportCompare(0, 0);