mirror of https://github.com/tc39/test262.git
34 lines
891 B
JavaScript
34 lines
891 B
JavaScript
// Copyright (C) 2020 Alexey Shvayka. 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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esid: sec-runtime-semantics-classdefinitionevaluation
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description: >
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[[IsHTMLDDA]] object as superclass: `null` check uses strict equality.
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IsConstructor check is performed before "prototype" lookup.
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info: |
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ClassDefinitionEvaluation
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[...]
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5. Else,
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[...]
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d. Let superclass be ? GetValue(superclassRef).
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e. If superclass is null, then
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[...]
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f. Else if IsConstructor(superclass) is false, throw a TypeError exception.
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features: [class, IsHTMLDDA]
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---*/
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var superclass = $262.IsHTMLDDA;
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var prototypeGets = 0;
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Object.defineProperty(superclass, "prototype", {
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get: function() {
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prototypeGets += 1;
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},
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});
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assert.throws(TypeError, function() {
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class C extends superclass {}
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});
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assert.sameValue(prototypeGets, 0);
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