mirror of https://github.com/tc39/test262.git
40 lines
1.5 KiB
JavaScript
40 lines
1.5 KiB
JavaScript
// Copyright 2017 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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description: Properties of the groups object are created with CreateDataProperty
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includes: [compareArray.js, 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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25. For each integer i such that i > 0 and i ≤ n
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f. If the ith capture of R was defined with a GroupName,
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i. Let s be the StringValue of the corresponding RegExpIdentifierName.
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ii. Perform ! CreateDataProperty(groups, s, capturedValue).
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---*/
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// Properties created on result.groups in textual order.
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assert(compareArray(["fst", "snd"],
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Object.getOwnPropertyNames(
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/(?<fst>.)|(?<snd>.)/u.exec("abcd").groups)));
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// Properties are created with Define, not Set
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let counter = 0;
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Object.defineProperty(Object.prototype, 'x', {set() { counter++; }});
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let match = /(?<x>.)/.exec('a');
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let groups = match.groups;
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assert.sameValue(counter, 0);
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// Properties are writable, enumerable and configurable
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// (from CreateDataProperty)
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verifyWritable(groups, "x");
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verifyEnumerable(groups, "x");
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verifyConfigurable(groups, "x");
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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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groups = /(?<__proto__>a)/u.exec("a").groups;
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assert.sameValue("a", groups.__proto__);
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assert.sameValue(null, Object.getPrototypeOf(groups));
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