1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/Array.prototype.keys.js b/js/src/tests/test262/language/statements/for-of/Array.prototype.keys.js
new file mode 100644
index 0000000000..2c71795448
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-of/Array.prototype.keys.js
@@ -0,0 +1,21 @@
+// Copyright (C) 2013 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+  description: >
+      The method should return a valid iterator that can be traversed using a
+      `for...of` loop.
+  es6id: 22.1.3.13
+---*/
+
+var array = [0, 'a', true, false, null, /* hole */, undefined, NaN];
+var i = 0;
+
+for (var value of array.keys()) {
+  assert.sameValue(value, i, 'element at index ' + i);
+  i++;
+}
+
+assert.sameValue(i, 8, 'Visits all elements');
+
+reportCompare(0, 0);