1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 (function TestIdentityEscapes() { 6 // \u not followed by 4 hex digits is treated as an identity escape. 7 var r0 = /\u/; 8 assertTrue(r0.test("u")); 9 10 r0 = RegExp("\\u"); 11 assertTrue(r0.test("u")); 12 13 var r1 = /\usecond/; 14 assertTrue(r1.test("usecond")); 15 16 r1 = RegExp("\\usecond"); 17 assertTrue(r1.test("usecond")); 18 19 var r2 = /first\u/; 20 assertTrue(r2.test("firstu")); 21 // This used to return true (which was a bug). 22 assertFalse(r2.test("first\\u")); 23 24 r2 = RegExp("first\\u"); 25 assertTrue(r2.test("firstu")); 26 // This used to return true (which was a bug). 27 assertFalse(r2.test("first\\u")); 28 29 var r3 = /first\usecond/; 30 assertTrue(r3.test("firstusecond")); 31 assertFalse(r3.test("first\\usecond")); 32 33 r3 = RegExp("first\\usecond"); 34 assertTrue(r3.test("firstusecond")); 35 assertFalse(r3.test("first\\usecond")); 36 37 var r4 = /first\u123second/; 38 assertTrue(r4.test("firstu123second")); 39 assertFalse(r4.test("first\\u123second")); 40 41 r4 = RegExp("first\\u123second"); 42 assertTrue(r4.test("firstu123second")); 43 assertFalse(r4.test("first\\u123second")); 44 45 // \X where X is not a legal escape character is treated as identity escape 46 // too. 47 var r5 = /\a/; 48 assertTrue(r5.test("a")); 49 50 r5 = RegExp("\\a"); 51 assertTrue(r5.test("a")); 52 53 var r6 = /\asecond/; 54 assertTrue(r6.test("asecond")); 55 56 r6 = RegExp("\\asecond"); 57 assertTrue(r6.test("asecond")); 58 59 var r7 = /first\a/; 60 assertTrue(r7.test("firsta")); 61 assertFalse(r7.test("first\\a")); 62 63 r7 = RegExp("first\\a"); 64 assertTrue(r7.test("firsta")); 65 assertFalse(r7.test("first\\a")); 66 67 var r8 = /first\asecond/; 68 assertTrue(r8.test("firstasecond")); 69 assertFalse(r8.test("first\\asecond")); 70 71 r8 = RegExp("first\\asecond"); 72 assertTrue(r8.test("firstasecond")); 73 assertFalse(r8.test("first\\asecond")); 74 })(); 75
