mirror of https://github.com/tc39/test262.git
35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
// Copyright 2017 Aleksey 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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description: Properties of the groups object are created with CreateDataProperty
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includes: [propertyHelper.js]
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esid: sec-regexpbuiltinexec
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features: [regexp-named-groups]
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info: >
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Runtime Semantics: RegExpBuiltinExec ( R, S )
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24. If R contains any GroupName,
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a. Let groups be ObjectCreate(null).
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b. Perform ! CreateDataProperty(A, "groups", groups).
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---*/
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// groups is created with Define, not Set
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let counter = 0;
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Object.defineProperty(Array.prototype, "groups", {set() { counter++; }});
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let match = /(?<x>.)/.exec("a");
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assert.sameValue(counter, 0);
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// groups is writable, enumerable and configurable
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// (from CreateDataProperty)
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verifyProperty(match, "groups", {
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writable: true,
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enumerable: true,
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configurable: true,
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});
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// The '__proto__' property on the groups object is not special,
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// and does not affect the [[Prototype]] of the resulting groups object.
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let {groups} = /(?<__proto__>.)/.exec("a");
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assert.sameValue("a", groups.__proto__);
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assert.sameValue(null, Object.getPrototypeOf(groups));
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