1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/WeakMap/properties-of-map-instances.js b/js/src/tests/test262/built-ins/WeakMap/properties-of-map-instances.js
new file mode 100644
index 0000000000..4eec328c6e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/WeakMap/properties-of-map-instances.js
@@ -0,0 +1,16 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-properties-of-weakmap-instances
+description: >
+  WeakMap instances are ordinary objects that inherit properties from the
+  WeakMap prototype.
+---*/
+
+assert.sameValue(
+  Object.getPrototypeOf(new WeakMap()),
+  WeakMap.prototype,
+  '`Object.getPrototypeOf(new WeakMap())` returns `WeakMap.prototype`'
+);
+
+reportCompare(0, 0);