1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/entries/tamper-with-object-keys.js b/js/src/tests/test262/built-ins/Object/entries/tamper-with-object-keys.js
new file mode 100644
index 0000000000..31dc24ee57
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/entries/tamper-with-object-keys.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-object.entries
+description: >
+    Object.entries should not have its behavior impacted by modifications to Object.keys
+author: Jordan Harband
+---*/
+
+function fakeObjectKeys() {
+  throw new Test262Error('The overriden version of Object.keys was called!');
+}
+
+Object.keys = fakeObjectKeys;
+
+assert.sameValue(Object.keys, fakeObjectKeys, 'Sanity check failed: could not modify the global Object.keys');
+assert.sameValue(Object.entries({
+  a: 1
+}).length, 1, 'Expected object with 1 key to have 1 entry');
+
+reportCompare(0, 0);