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 // Flags: --harmony-strings 6 7 // Tests taken from: 8 // https://github.com/mathiasbynens/String.prototype.codePointAt 9 10 assertEquals(String.prototype.codePointAt.length, 1); 11 assertEquals(String.prototype.propertyIsEnumerable("codePointAt"), false); 12 13 // String that starts with a BMP symbol 14 assertEquals("abc\uD834\uDF06def".codePointAt(""), 0x61); 15 assertEquals("abc\uD834\uDF06def".codePointAt("_"), 0x61); 16 assertEquals("abc\uD834\uDF06def".codePointAt(), 0x61); 17 assertEquals("abc\uD834\uDF06def".codePointAt(-Infinity), undefined); 18 assertEquals("abc\uD834\uDF06def".codePointAt(-1), undefined); 19 assertEquals("abc\uD834\uDF06def".codePointAt(-0), 0x61); 20 assertEquals("abc\uD834\uDF06def".codePointAt(0), 0x61); 21 assertEquals("abc\uD834\uDF06def".codePointAt(3), 0x1D306); 22 assertEquals("abc\uD834\uDF06def".codePointAt(4), 0xDF06); 23 assertEquals("abc\uD834\uDF06def".codePointAt(5), 0x64); 24 assertEquals("abc\uD834\uDF06def".codePointAt(42), undefined); 25 assertEquals("abc\uD834\uDF06def".codePointAt(Infinity), undefined); 26 assertEquals("abc\uD834\uDF06def".codePointAt(Infinity), undefined); 27 assertEquals("abc\uD834\uDF06def".codePointAt(NaN), 0x61); 28 assertEquals("abc\uD834\uDF06def".codePointAt(false), 0x61); 29 assertEquals("abc\uD834\uDF06def".codePointAt(null), 0x61); 30 assertEquals("abc\uD834\uDF06def".codePointAt(undefined), 0x61); 31 32 // String that starts with an astral symbol 33 assertEquals("\uD834\uDF06def".codePointAt(""), 0x1D306); 34 assertEquals("\uD834\uDF06def".codePointAt("1"), 0xDF06); 35 assertEquals("\uD834\uDF06def".codePointAt("_"), 0x1D306); 36 assertEquals("\uD834\uDF06def".codePointAt(), 0x1D306); 37 assertEquals("\uD834\uDF06def".codePointAt(-1), undefined); 38 assertEquals("\uD834\uDF06def".codePointAt(-0), 0x1D306); 39 assertEquals("\uD834\uDF06def".codePointAt(0), 0x1D306); 40 assertEquals("\uD834\uDF06def".codePointAt(1), 0xDF06); 41 assertEquals("\uD834\uDF06def".codePointAt(42), undefined); 42 assertEquals("\uD834\uDF06def".codePointAt(false), 0x1D306); 43 assertEquals("\uD834\uDF06def".codePointAt(null), 0x1D306); 44 assertEquals("\uD834\uDF06def".codePointAt(undefined), 0x1D306); 45 46 // Lone high surrogates 47 assertEquals("\uD834abc".codePointAt(""), 0xD834); 48 assertEquals("\uD834abc".codePointAt("_"), 0xD834); 49 assertEquals("\uD834abc".codePointAt(), 0xD834); 50 assertEquals("\uD834abc".codePointAt(-1), undefined); 51 assertEquals("\uD834abc".codePointAt(-0), 0xD834); 52 assertEquals("\uD834abc".codePointAt(0), 0xD834); 53 assertEquals("\uD834abc".codePointAt(false), 0xD834); 54 assertEquals("\uD834abc".codePointAt(NaN), 0xD834); 55 assertEquals("\uD834abc".codePointAt(null), 0xD834); 56 assertEquals("\uD834abc".codePointAt(undefined), 0xD834); 57 58 // Lone low surrogates 59 assertEquals("\uDF06abc".codePointAt(""), 0xDF06); 60 assertEquals("\uDF06abc".codePointAt("_"), 0xDF06); 61 assertEquals("\uDF06abc".codePointAt(), 0xDF06); 62 assertEquals("\uDF06abc".codePointAt(-1), undefined); 63 assertEquals("\uDF06abc".codePointAt(-0), 0xDF06); 64 assertEquals("\uDF06abc".codePointAt(0), 0xDF06); 65 assertEquals("\uDF06abc".codePointAt(false), 0xDF06); 66 assertEquals("\uDF06abc".codePointAt(NaN), 0xDF06); 67 assertEquals("\uDF06abc".codePointAt(null), 0xDF06); 68 assertEquals("\uDF06abc".codePointAt(undefined), 0xDF06); 69 70 assertThrows(function() { 71 String.prototype.codePointAt.call(undefined); 72 }, TypeError); 73 assertThrows(function() { 74 String.prototype.codePointAt.call(undefined, 4); 75 }, TypeError); 76 assertThrows(function() { 77 String.prototype.codePointAt.call(null); 78 }, TypeError); 79 assertThrows(function() { 80 String.prototype.codePointAt.call(null, 4); 81 }, TypeError); 82 assertEquals(String.prototype.codePointAt.call(42, 0), 0x34); 83 assertEquals(String.prototype.codePointAt.call(42, 1), 0x32); 84 assertEquals(String.prototype.codePointAt.call({ 85 toString: function() { return "abc"; } 86 }, 2), 0x63); 87 var tmp = 0; 88 assertEquals(String.prototype.codePointAt.call({ 89 toString: function() { ++tmp; return String(tmp); } 90 }, 0), 0x31); 91 assertEquals(tmp, 1); 92
