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| 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); |
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