mirror of https://github.com/tc39/test262.git
47 lines
2.1 KiB
JavaScript
47 lines
2.1 KiB
JavaScript
// Copyright 2018 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: Named groups can be used in conjunction with lookbehind
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esid: prod-GroupSpecifier
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features: [regexp-named-groups, regexp-lookbehind]
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includes: [compareArray.js]
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---*/
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// Unicode mode
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assert(compareArray(["f", "c"], "abcdef".match(/(?<=(?<a>\w){3})f/u)));
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assert.sameValue("c", "abcdef".match(/(?<=(?<a>\w){3})f/u).groups.a);
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assert.sameValue("b", "abcdef".match(/(?<=(?<a>\w){4})f/u).groups.a);
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assert.sameValue("a", "abcdef".match(/(?<=(?<a>\w)+)f/u).groups.a);
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assert.sameValue(null, "abcdef".match(/(?<=(?<a>\w){6})f/u));
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assert(compareArray(["f", ""], "abcdef".match(/((?<=\w{3}))f/u)));
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assert(compareArray(["f", ""], "abcdef".match(/(?<a>(?<=\w{3}))f/u)));
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assert(compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\d){3})f/u)));
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assert.sameValue(null, "abcdef".match(/(?<!(?<a>\D){3})f/u));
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assert(compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\D){3})f|f/u)));
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assert(compareArray(["f", undefined], "abcdef".match(/(?<a>(?<!\D{3}))f|f/u)));
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// Non-Unicode mode
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assert(compareArray(["f", "c"], "abcdef".match(/(?<=(?<a>\w){3})f/)));
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assert.sameValue("c", "abcdef".match(/(?<=(?<a>\w){3})f/).groups.a);
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assert.sameValue("b", "abcdef".match(/(?<=(?<a>\w){4})f/).groups.a);
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assert.sameValue("a", "abcdef".match(/(?<=(?<a>\w)+)f/).groups.a);
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assert.sameValue(null, "abcdef".match(/(?<=(?<a>\w){6})f/));
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assert(compareArray(["f", ""], "abcdef".match(/((?<=\w{3}))f/)));
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assert(compareArray(["f", ""], "abcdef".match(/(?<a>(?<=\w{3}))f/)));
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assert(compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\d){3})f/)));
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assert.sameValue(null, "abcdef".match(/(?<!(?<a>\D){3})f/));
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assert(compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\D){3})f|f/)));
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assert(compareArray(["f", undefined], "abcdef".match(/(?<a>(?<!\D{3}))f|f/)));
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// Even within a lookbehind, properties are created in left to right 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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