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39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
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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esid: sec-generatorfunction
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description: Definition of instance `length` property
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info: |
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[...]
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3. Return CreateDynamicFunction(C, NewTarget, "generator", args).
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19.2.1.1.1 Runtime Semantics: CreateDynamicFunction
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[...]
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26. Perform FunctionInitialize(F, Normal, parameters, body, scope).
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[...]
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9.2.4 FunctionInitialize
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[...]
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3. Perform ! DefinePropertyOrThrow(F, "length",
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PropertyDescriptor{[[Value]]: len, [[Writable]]: false, [[Enumerable]]:
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false, [[Configurable]]: true}).
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[...]
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includes: [propertyHelper.js]
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features: [generators]
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---*/
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var GeneratorFunction = Object.getPrototypeOf(function*() {}).constructor;
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assert.sameValue(GeneratorFunction().length, 0);
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assert.sameValue(GeneratorFunction('').length, 0);
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assert.sameValue(GeneratorFunction('x').length, 0);
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assert.sameValue(GeneratorFunction('x', '').length, 1);
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assert.sameValue(GeneratorFunction('x', 'y', '').length, 2);
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assert.sameValue(GeneratorFunction('x, y', '').length, 2);
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verifyNotEnumerable(GeneratorFunction(), 'length');
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verifyNotWritable(GeneratorFunction(), 'length');
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verifyConfigurable(GeneratorFunction(), 'length');
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