Skip to content

V
V8
Switch branch/tag
Find file
Normal viewHistoryPermalink
unicode-regexp-last-index.js 3.42 KB
Newer Older
yangguo's avatar
[regexp] step back if starting unicode regexp within surrogate pair.
3246d26b
 
yangguo committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 
// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

var r = /./ug;
assertEquals(["\ud800\udc00"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
r.lastIndex = 1;
assertEquals(["\ud800\udc00"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
assertEquals(["\ud801\udc01"], r.exec("\ud800\udc00\ud801\udc01"));
r.lastIndex = 3;
assertEquals(["\ud801\udc01"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(4, r.lastIndex);
r.lastIndex = 4;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);
r.lastIndex = 5;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);

r.lastIndex = 3;
assertEquals(["\ud802"], r.exec("\ud800\udc00\ud801\ud802"));
r.lastIndex = 4;
assertNull(r.exec("\ud800\udc00\ud801\ud802"));

r = /./g;
assertEquals(["\ud800"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(1, r.lastIndex);
assertEquals(["\udc00"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
assertEquals(["\ud801"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(3, r.lastIndex);
assertEquals(["\udc01"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(4, r.lastIndex);
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);
r.lastIndex = 1;
assertEquals(["\udc00"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);

// ------------------------

r = /^./ug;
assertEquals(["\ud800\udc00"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
r.lastIndex = 1;
assertEquals(["\ud800\udc00"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);
r.lastIndex = 3;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);
r.lastIndex = 4;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);
r.lastIndex = 5;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);

r = /^./g;
assertEquals(["\ud800"], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(1, r.lastIndex);
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);
r.lastIndex = 3;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(0, r.lastIndex);

//------------------------

r = /(?:(^.)|.)/ug;
assertEquals(["\ud800\udc00", "\ud800\udc00"],
             r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
r.lastIndex = 1;
assertEquals(["\ud800\udc00", "\ud800\udc00"],
             r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
assertEquals(["\ud801\udc01", undefined], r.exec("\ud800\udc00\ud801\udc01"));
r.lastIndex = 3;
assertEquals(["\ud801\udc01", undefined], r.exec("\ud800\udc00\ud801\udc01"));
r.lastIndex = 4;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));
r.lastIndex = 5;
assertNull(r.exec("\ud800\udc00\ud801\udc01"));

r.lastIndex = 3;
assertEquals(["\ud802", undefined], r.exec("\ud800\udc00\ud801\ud802"));
r.lastIndex = 4;
assertNull(r.exec("\ud800\udc00\ud801\ud802"));

r = /(?:(^.)|.)/g;
assertEquals(["\ud800", "\ud800"],
    r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(1, r.lastIndex);
assertEquals(["\udc00", undefined], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(2, r.lastIndex);
r.lastIndex = 3;
assertEquals(["\udc01", undefined], r.exec("\ud800\udc00\ud801\udc01"));
assertEquals(4, r.lastIndex);