mirror of https://github.com/tc39/test262.git
32 lines
1.1 KiB
JavaScript
32 lines
1.1 KiB
JavaScript
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// 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: 25.2.4.1
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description: >
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Subclassed GeneratorFunction instances `length` property
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info: >
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25.2.4.1 length
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The value of the length property is an integer that indicates the typical
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number of arguments expected by the GeneratorFunction. However, the language
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permits the function to be invoked with some other number of arguments. The
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behaviour of a GeneratorFunction when invoked on a number of arguments other
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than the number specified by its length property depends on the function.
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This property has the attributes { [[Writable]]: false, [[Enumerable]]: false,
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[[Configurable]]: true }.
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includes: [propertyHelper.js]
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---*/
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var GeneratorFunction = Object.getPrototypeOf(function* () {}).constructor;
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class GFn extends GeneratorFunction {}
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var gfn = new GFn('a', 'b', 'return a + b');
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assert.sameValue(gfn.length, 2);
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verifyNotEnumerable(gfn, 'length');
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verifyNotWritable(gfn, 'length');
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verifyConfigurable(gfn, 'length');
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