1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/subclass/builtin-objects/WeakSet/super-must-be-called.js b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/WeakSet/super-must-be-called.js
new file mode 100644
index 0000000000..473bbf7c5e
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/subclass/builtin-objects/WeakSet/super-must-be-called.js
@@ -0,0 +1,36 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 23.4.1
+description: Super need to be called to initialize internals
+info: |
+  23.4.1 The WeakSet Constructor
+
+  ...
+
+  The WeakSet constructor is designed to be subclassable. It may be used as the
+  value in an extends clause of a class definition. Subclass constructors that
+  intend to inherit the specified WeakSet behaviour must include a super call to
+  the WeakSet constructor to create and initialize the subclass instance with
+  the internal state necessary to support the WeakSet.prototype built-in
+  methods.
+features: [WeakSet]
+---*/
+
+class WS1 extends WeakSet {
+  constructor() {}
+}
+
+assert.throws(ReferenceError, function() {
+  new WS1();
+});
+
+class WS2 extends WeakSet {
+  constructor() {
+    super();
+  }
+}
+
+new WS2();
+
+reportCompare(0, 0);