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Pick up latest commit from the 5.4-lkgr branch. deps: edit V8 gitignore to allow trace event copy deps: update V8 trace event to 315bf1e2d45be7d53346c31cfcc37424a32c30c8 deps: edit V8 gitignore to allow gtest_prod.h copy deps: update V8 gtest to 6f8a66431cb592dad629028a50b3dd418a408c87 PR-URL: https://github.com/nodejs/node/pull/8317 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
57 lines
1.8 KiB
JavaScript
57 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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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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