mirror of https://github.com/tc39/test262.git
36 lines
1.6 KiB
JavaScript
36 lines
1.6 KiB
JavaScript
// Copyright 2022 Igalia S.L. 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: Matching behavior with duplicate named capture groups
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esid: prod-GroupSpecifier
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features: [regexp-duplicate-named-groups]
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includes: [compareArray.js]
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---*/
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assert.compareArray(/(?<x>a)|(?<x>b)/.exec("bab"), ["b", undefined, "b"]);
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assert.compareArray(/(?<x>b)|(?<x>a)/.exec("bab"), ["b", "b", undefined]);
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assert.compareArray(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("aa"), ["aa", "a", undefined]);
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assert.compareArray(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("bb"), ["bb", undefined, "b"]);
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let matchResult = /(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/.exec("aabb");
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assert.compareArray(matchResult, ["aabb", undefined, "b"]);
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assert.sameValue(matchResult.groups.x, "b");
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assert.sameValue(/(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/.exec("abab"), null);
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assert.sameValue(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("abab"), null);
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assert.sameValue(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("cdef"), null);
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assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/.exec("xx"), ["xx", "x", undefined]);
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assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/.exec("z"), ["z", undefined, undefined]);
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assert.sameValue(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/.exec("zz"), null);
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assert.compareArray(/(?<a>x)|(?:zy\k<a>)/.exec("zy"), ["zy", undefined]);
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assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("xz"), ["xz", undefined, undefined]);
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assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("yz"), ["yz", undefined, undefined]);
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assert.sameValue(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("xzx"), null);
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assert.sameValue(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("yzy"), null);
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