mirror of https://github.com/tc39/test262.git
33 lines
1.6 KiB
JavaScript
33 lines
1.6 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: RegExp negative lookbehind
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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
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Continuation 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
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MatchResult.
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b. Call m(x, d) and let r be its result.
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c. If r is not failure, return failure.
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d. Call c(x) 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.compareArray("abcdef".match(/(?<!abc)\w\w\w/), ["abc"], "#1");
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assert.compareArray("abcdef".match(/(?<!a.c)\w\w\w/), ["abc"], "#2");
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assert.compareArray("abcdef".match(/(?<!a\wc)\w\w\w/), ["abc"], "#3");
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assert.compareArray("abcdef".match(/(?<!a[a-z])\w\w\w/), ["abc"], "#4");
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assert.compareArray("abcdef".match(/(?<!a[a-z]{2})\w\w\w/), ["abc"], "#5");
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assert.sameValue("abcdef".match(/(?<!abc)def/), null, "#6");
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assert.sameValue("abcdef".match(/(?<!a.c)def/), null, "#7");
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assert.sameValue("abcdef".match(/(?<!a\wc)def/), null, "#8");
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assert.sameValue("abcdef".match(/(?<!a[a-z][a-z])def/), null, "#9");
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assert.sameValue("abcdef".match(/(?<!a[a-z]{2})def/), null, "#10");
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assert.sameValue("abcdef".match(/(?<!a{1}b{1})cde/), null, "#11");
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assert.sameValue("abcdef".match(/(?<!a{1}[a-z]{2})def/), null, "#12");
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