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