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40 lines
1.2 KiB
JavaScript
40 lines
1.2 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|, then
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a. Let _groups_ be ObjectCreate(*null*).
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25. Else,
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a. Let _groups_ be *undefined*.
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26. 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", {
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set() { counter++; }
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});
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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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