aff7bd54be
BUG=v8:4717 LOG=N Review URL: https://codereview.chromium.org/1663543003 Cr-Commit-Position: refs/heads/master@{#33706}
59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --harmony-unicode-regexps
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var L = "\ud800";
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var T = "\udc00";
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var x = "x";
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var r = /()/g; // Global, but not unicode.
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// Zero-length matches do not advance lastIndex.
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assertEquals(["", ""], r.exec(L + T + L + T));
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assertEquals(0, r.lastIndex);
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r.lastIndex = 1;
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assertEquals(["", ""], r.exec(L + T + L + T));
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assertEquals(1, r.lastIndex);
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var u = /()/ug; // Global and unicode.
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// Zero-length matches do not advance lastIndex.
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assertEquals(["", ""], u.exec(L + T + L + T));
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assertEquals(0, u.lastIndex);
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u.lastIndex = 1;
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assertEquals(["", ""], u.exec(L + T + L + T));
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assertEquals(0, u.lastIndex);
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// However, with repeating matches, lastIndex does not matter.
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// We do advance from match to match.
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r.lastIndex = 2;
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assertEquals(x + L + x + T + x + L + x + T + x,
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(L + T + L + T).replace(r, "x"));
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// With unicode flag, we advance code point by code point.
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u.lastIndex = 3;
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assertEquals(x + L + T + x + L + T + x,
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(L + T + L + T).replace(u, "x"));
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// Test that exhausting the global match cache is fine.
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assertEquals((x + L + T).repeat(1000) + x,
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(L + T).repeat(1000).replace(u, "x"));
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// Same thing for RegExp.prototype.match.
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r.lastIndex = 1;
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assertEquals(["","","","",""], (L + T + L + T).match(r));
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r.lastIndex = 2;
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assertEquals(["","","","",""], (L + T + L + T).match(r));
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u.lastIndex = 1;
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assertEquals(["","",""], (L + T + L + T).match(u));
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u.lastIndex = 2;
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assertEquals(["","",""], (L + T + L + T).match(u));
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var expected = [];
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for (var i = 0; i <= 1000; i++) expected.push("");
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assertEquals(expected, (L + T).repeat(1000).match(u));
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// Also test RegExp.prototype.@@split.
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assertEquals(["\u{12345}"], "\u{12345}".split(/(?:)/u));
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