mirror of https://github.com/tc39/test262.git
41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
// Copyright 2019 Ron Buckton. 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: The groups object of indices is created with CreateDataProperty
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includes: [compareArray.js, propertyHelper.js]
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esid: sec-makeindicesarray
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features: [regexp-named-groups, regexp-match-indices]
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info: |
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MakeIndicesArray ( S, indices, groupNames )
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8. If _groupNames_ is not *undefined*, then
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a. Let _groups_ be ! ObjectCreate(*null*).
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9. Else,
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a. Let _groups_ be *undefined*.
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10. 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 indices = /(?<x>.)/.exec("a").indices;
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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(indices, '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").indices;
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assert.compareArray([0, 1], groups.__proto__);
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assert.sameValue(null, Object.getPrototypeOf(groups));
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