29745ee927
V8 was applying incorrect optimization to them advancing the start position. This would cause /foo$/y too match "barfoo", which it should not. BUG= Review-Url: https://codereview.chromium.org/2510743003 Cr-Commit-Position: refs/heads/master@{#41077}
138 lines
4.7 KiB
JavaScript
138 lines
4.7 KiB
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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var re = /foo.bar/;
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assertTrue(!!"foo*bar".match(re));
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assertTrue(!!"..foo*bar".match(re));
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var plain = /foobar/;
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assertTrue(!!"foobar".match(plain));
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assertTrue(!!"..foobar".match(plain));
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var sticky = /foo.bar/y;
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assertTrue(!!"foo*bar".match(sticky));
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assertEquals(7, sticky.lastIndex);
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assertFalse(!!"..foo*bar".match(sticky));
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var stickyplain = /foobar/y;
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assertTrue(!!"foobar".match(stickyplain));
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assertEquals(6, stickyplain.lastIndex);
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assertFalse(!!"..foobar".match(stickyplain));
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var global = /foo.bar/g;
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assertTrue(global.test("foo*bar"));
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assertFalse(global.test("..foo*bar"));
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global.lastIndex = 0;
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assertTrue(global.test("..foo*bar"));
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var plainglobal = /foobar/g;
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assertTrue(plainglobal.test("foobar"));
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assertFalse(plainglobal.test("foobar"));
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plainglobal.lastIndex = 0;
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assertTrue(plainglobal.test("foobar"));
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var stickyglobal = /foo.bar/gy;
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assertTrue(stickyglobal.test("foo*bar"));
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assertEquals(7, stickyglobal.lastIndex);
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assertFalse(stickyglobal.test("..foo*bar"));
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stickyglobal.lastIndex = 0;
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assertFalse(stickyglobal.test("..foo*bar"));
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stickyglobal.lastIndex = 2;
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assertTrue(stickyglobal.test("..foo*bar"));
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assertEquals(9, stickyglobal.lastIndex);
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var stickyplainglobal = /foobar/yg;
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assertTrue(stickyplainglobal.sticky);
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stickyplainglobal.sticky = false;
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assertTrue(stickyplainglobal.test("foobar"));
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assertEquals(6, stickyplainglobal.lastIndex);
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assertFalse(stickyplainglobal.test("..foobar"));
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stickyplainglobal.lastIndex = 0;
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assertFalse(stickyplainglobal.test("..foobar"));
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stickyplainglobal.lastIndex = 2;
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assertTrue(stickyplainglobal.test("..foobar"));
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assertEquals(8, stickyplainglobal.lastIndex);
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assertEquals("/foo.bar/gy", "" + stickyglobal);
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assertEquals("/foo.bar/g", "" + global);
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assertTrue(stickyglobal.sticky);
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stickyglobal.sticky = false;
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assertTrue(stickyglobal.sticky);
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var stickyglobal2 = new RegExp("foo.bar", "gy");
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assertTrue(stickyglobal2.test("foo*bar"));
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assertEquals(7, stickyglobal2.lastIndex);
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assertFalse(stickyglobal2.test("..foo*bar"));
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stickyglobal2.lastIndex = 0;
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assertFalse(stickyglobal2.test("..foo*bar"));
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stickyglobal2.lastIndex = 2;
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assertTrue(stickyglobal2.test("..foo*bar"));
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assertEquals(9, stickyglobal2.lastIndex);
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assertEquals("/foo.bar/gy", "" + stickyglobal2);
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assertTrue(stickyglobal2.sticky);
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stickyglobal2.sticky = false;
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assertTrue(stickyglobal2.sticky);
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sticky.lastIndex = -1; // Causes sticky regexp to fail fast
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assertFalse(sticky.test("..foo.bar"));
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assertEquals(0, sticky.lastIndex);
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sticky.lastIndex = -1; // Causes sticky regexp to fail fast
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assertFalse(!!sticky.exec("..foo.bar"));
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assertEquals(0, sticky.lastIndex);
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// ES6 draft says: Even when the y flag is used with a pattern, ^ always
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// matches only at the beginning of Input, or (if Multiline is true) at the
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// beginning of a line.
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var hat = /^foo/y;
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hat.lastIndex = 2;
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assertFalse(hat.test("..foo"));
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var mhat = /^foo/my;
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mhat.lastIndex = 2;
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assertFalse(mhat.test("..foo"));
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mhat.lastIndex = 2;
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assertTrue(mhat.test(".\nfoo"));
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// Check that we don't apply incorrect optimization to sticky regexps that
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// are anchored at end.
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var stickyanchored = /bar$/y;
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assertFalse(stickyanchored.test("foobar"));
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stickyanchored.lastIndex = 3;
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assertTrue(stickyanchored.test("foobar"));
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