mirror of https://github.com/tc39/test262.git
34 lines
865 B
JavaScript
34 lines
865 B
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 23.4.1
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description: Super need to be called to initialize internals
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info: >
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23.4.1 The WeakSet Constructor
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...
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The WeakSet constructor is designed to be subclassable. It may be used as the
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value in an extends clause of a class definition. Subclass constructors that
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intend to inherit the specified WeakSet behaviour must include a super call to
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the WeakSet constructor to create and initialize the subclass instance with
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the internal state necessary to support the WeakSet.prototype built-in
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methods.
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---*/
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class WS1 extends WeakSet {
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constructor() {}
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}
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assert.throws(ReferenceError, function() {
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new WS1();
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});
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class WS2 extends WeakSet {
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constructor() {
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super();
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}
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}
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new WS2();
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