JezK
Edit File: regexp-global.js
// Copyright 2012 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Test that an optional capture is cleared between two matches. var str = "ABX X"; str = str.replace(/(\w)?X/g, function(match, capture) { assertTrue(match.indexOf(capture) >= 0 || capture === undefined); return capture ? capture.toLowerCase() : "-"; }); assertEquals("Ab -", str); // Test zero-length matches. str = "Als Gregor Samsa eines Morgens"; str = str.replace(/\b/g, function(match, capture) { return "/"; }); assertEquals("/Als/ /Gregor/ /Samsa/ /eines/ /Morgens/", str); // Test zero-length matches that have non-zero-length sub-captures. str = "It was a pleasure to burn."; str = str.replace(/(?=(\w+))\b/g, function(match, capture) { return capture.length; }); assertEquals("2It 3was 1a 8pleasure 2to 4burn.", str); // Test multiple captures. str = "Try not. Do, or do not. There is no try."; str = str.replace(/(not?)|(do)|(try)/gi, function(match, c1, c2, c3) { assertTrue((c1 === undefined && c2 === undefined) || (c2 === undefined && c3 === undefined) || (c1 === undefined && c3 === undefined)); if (c1) return "-"; if (c2) return "+"; if (c3) return "=" }); assertEquals("= -. +, or + -. There is - =.", str); // Test multiple alternate captures. str = "FOUR LEGS GOOD, TWO LEGS BAD!"; str = str.replace(/(FOUR|TWO) LEGS (GOOD|BAD)/g, function(match, num_legs, likeability) { assertTrue(num_legs !== undefined); assertTrue(likeability !== undefined); if (num_legs == "FOUR") assertTrue(likeability == "GOOD"); if (num_legs == "TWO") assertTrue(likeability == "BAD"); return match.length - 10; }); assertEquals("4, 2!", str); // The same tests with UC16. //Test that an optional capture is cleared between two matches. str = "AB\u1234 \u1234"; str = str.replace(/(\w)?\u1234/g, function(match, capture) { assertTrue(match.indexOf(capture) >= 0 || capture === undefined); return capture ? capture.toLowerCase() : "-"; }); assertEquals("Ab -", str); // Test zero-length matches. str = "Als \u2623\u2642 eines Morgens"; str = str.replace(/\b/g, function(match, capture) { return "/"; }); assertEquals("/Als/ \u2623\u2642 /eines/ /Morgens/", str); // Test zero-length matches that have non-zero-length sub-captures. str = "It was a pleasure to \u70e7."; str = str.replace(/(?=(\w+))\b/g, function(match, capture) { return capture.length; }); assertEquals("2It 3was 1a 8pleasure 2to \u70e7.", str); // Test multiple captures. str = "Try not. D\u26aa, or d\u26aa not. There is no try."; str = str.replace(/(not?)|(d\u26aa)|(try)/gi, function(match, c1, c2, c3) { assertTrue((c1 === undefined && c2 === undefined) || (c2 === undefined && c3 === undefined) || (c1 === undefined && c3 === undefined)); if (c1) return "-"; if (c2) return "+"; if (c3) return "=" }); assertEquals("= -. +, or + -. There is - =.", str); // Test multiple alternate captures. str = "FOUR \u817f GOOD, TWO \u817f BAD!"; str = str.replace(/(FOUR|TWO) \u817f (GOOD|BAD)/g, function(match, num_legs, likeability) { assertTrue(num_legs !== undefined); assertTrue(likeability !== undefined); if (num_legs == "FOUR") assertTrue(likeability == "GOOD"); if (num_legs == "TWO") assertTrue(likeability == "BAD"); return match.length - 7; }); assertEquals("4, 2!", str); // Test capture that is a real substring. var str = "Beasts of England, beasts of Ireland"; str = str.replace(/(.*)/g, function(match) { return '~'; }); assertEquals("~~", str);