mirror of https://github.com/tc39/test262.git
42 lines
2.1 KiB
JavaScript
42 lines
2.1 KiB
JavaScript
// Copyright (C) 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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esid: sec-assertion
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description: Start of line matches
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info: |
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The production Assertion :: (?<=Disjunction) evaluates as follows:
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1. Evaluate Disjunction with -1 as its direction argument to obtain a Matcher m.
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2. Return an internal Matcher closure that takes two arguments, a State x and a Continuation
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c, and performs the following steps:
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a. Let d be a Continuation that always returns its State argument as a successful MatchResult.
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b. Call m(x, d) and let r be its result.
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c. If r is failure, return failure.
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d. Let y be r's State.
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e. Let cap be y's captures List.
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f. Let xe be x's endIndex.
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g. Let z be the State (xe, cap).
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h. Call c(z) and return its result.
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features: [regexp-lookbehind]
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includes: [compareArray.js]
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---*/
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assert.sameValue("abcdef".match(/(?<=^[^a-c]{3})def/), null, "#1");
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assert.sameValue("foooo".match(/"^foooo(?<=^o+)$/), null, "#2");
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assert.sameValue("foooo".match(/"^foooo(?<=^o*)$/), null, "#3");
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assert.compareArray("abcdef".match(/(?<=^abc)def/), ["def"], "#4");
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assert.compareArray("abcdef".match(/(?<=^[a-c]{3})def/), ["def"], "#5");
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assert.compareArray("xyz\nabcdef".match(/(?<=^[a-c]{3})def/m), ["def"], "#6");
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assert.compareArray("ab\ncd\nefg".match(/(?<=^)\w+/gm), ["ab", "cd", "efg"], "#7");
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assert.compareArray("ab\ncd\nefg".match(/\w+(?<=$)/gm), ["ab", "cd", "efg"], "#8");
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assert.compareArray("ab\ncd\nefg".match(/(?<=^)\w+(?<=$)/gm), ["ab", "cd", "efg"], "#9");
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assert.compareArray("foo".match(/^foo(?<=^fo+)$/), ["foo"], "#10");
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assert.compareArray("foooo".match(/^foooo(?<=^fo*)/), ["foooo"], "#11");
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assert.compareArray("foo".match(/^(f)oo(?<=^\1o+)$/), ["foo", "f"], "#12");
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assert.compareArray("foo".match(/^(f)oo(?<=^\1o+)$/i), ["foo", "f"], "#13");
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assert.compareArray("foo\u1234".match(/^(f)oo(?<=^\1o+).$/i), ["foo\u1234", "f"], "#14");
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assert.compareArray("abcdefdef".match(/(?<=^\w+)def/), ["def"], "#15");
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assert.compareArray("abcdefdef".match(/(?<=^\w+)def/g), ["def", "def"], "#16");
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