From ff3724fd4348542625d9b896b0a1aaffb117e434 Mon Sep 17 00:00:00 2001
From: Leonardo Balter <leonardo.balter@gmail.com>
Date: Mon, 11 Jan 2016 17:25:22 -0500
Subject: [PATCH] Add tests for Subclassing the built-in WeakMap Objects
---
.../WeakMap/regular-subclassing.js | 28 ++++++++++++++++
.../WeakMap/super-must-be-called.js | 33 +++++++++++++++++++
2 files changed, 61 insertions(+)
create mode 100644 test/language/subclassing/WeakMap/regular-subclassing.js
create mode 100644 test/language/subclassing/WeakMap/super-must-be-called.js
diff --git a/test/language/subclassing/WeakMap/regular-subclassing.js b/test/language/subclassing/WeakMap/regular-subclassing.js
new file mode 100644
index 0000000000..3cc6a9b23f
--- /dev/null
+++ b/test/language/subclassing/WeakMap/regular-subclassing.js
@@ -0,0 +1,28 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 23.3.1
+description: Subclassing the WeakMap object
+info: >
+ 23.3.1 The WeakMap Constructor
+
+ ...
+
+ The WeakMap 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 WeakMap behaviour must include a super call to
+ the WeakMap constructor to create and initialize the subclass instance with
+ the internal state necessary to support the WeakMap.prototype built-in
+ methods.
+---*/
+
+class WM extends WeakMap {}
+
+var map = new WM();
+var obj = {};
+
+assert.sameValue(map.has(obj), false);
+
+map.set(obj, 42);
+assert.sameValue(map.has(obj), true);
+assert.sameValue(map.get(obj), 42);
diff --git a/test/language/subclassing/WeakMap/super-must-be-called.js b/test/language/subclassing/WeakMap/super-must-be-called.js
new file mode 100644
index 0000000000..e277ff7d6d
--- /dev/null
+++ b/test/language/subclassing/WeakMap/super-must-be-called.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 23.3.1
+description: Super need to be called to initialize internals
+info: >
+ 23.3.1 The WeakMap Constructor
+
+ ...
+
+ The WeakMap 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 WeakMap behaviour must include a super call to
+ the WeakMap constructor to create and initialize the subclass instance with
+ the internal state necessary to support the WeakMap.prototype built-in
+ methods.
+---*/
+
+class M1 extends WeakMap {
+ constructor() {}
+}
+
+assert.throws(ReferenceError, function() {
+ new M1();
+});
+
+class M2 extends WeakMap {
+ constructor() {
+ super();
+ }
+}
+
+new M2();
--
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