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