90 lines
4.0 KiB
JavaScript
90 lines
4.0 KiB
JavaScript
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// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Tests taken from:
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// https://github.com/mathiasbynens/String.prototype.codePointAt
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assertEquals(String.prototype.codePointAt.length, 1);
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assertEquals(String.prototype.propertyIsEnumerable("codePointAt"), false);
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// String that starts with a BMP symbol
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assertEquals("abc\uD834\uDF06def".codePointAt(""), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt("_"), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(-Infinity), undefined);
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assertEquals("abc\uD834\uDF06def".codePointAt(-1), undefined);
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assertEquals("abc\uD834\uDF06def".codePointAt(-0), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(0), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(3), 0x1D306);
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assertEquals("abc\uD834\uDF06def".codePointAt(4), 0xDF06);
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assertEquals("abc\uD834\uDF06def".codePointAt(5), 0x64);
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assertEquals("abc\uD834\uDF06def".codePointAt(42), undefined);
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assertEquals("abc\uD834\uDF06def".codePointAt(Infinity), undefined);
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assertEquals("abc\uD834\uDF06def".codePointAt(Infinity), undefined);
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assertEquals("abc\uD834\uDF06def".codePointAt(NaN), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(false), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(null), 0x61);
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assertEquals("abc\uD834\uDF06def".codePointAt(undefined), 0x61);
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// String that starts with an astral symbol
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assertEquals("\uD834\uDF06def".codePointAt(""), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt("1"), 0xDF06);
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assertEquals("\uD834\uDF06def".codePointAt("_"), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt(), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt(-1), undefined);
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assertEquals("\uD834\uDF06def".codePointAt(-0), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt(0), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt(1), 0xDF06);
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assertEquals("\uD834\uDF06def".codePointAt(42), undefined);
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assertEquals("\uD834\uDF06def".codePointAt(false), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt(null), 0x1D306);
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assertEquals("\uD834\uDF06def".codePointAt(undefined), 0x1D306);
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// Lone high surrogates
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assertEquals("\uD834abc".codePointAt(""), 0xD834);
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assertEquals("\uD834abc".codePointAt("_"), 0xD834);
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assertEquals("\uD834abc".codePointAt(), 0xD834);
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assertEquals("\uD834abc".codePointAt(-1), undefined);
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assertEquals("\uD834abc".codePointAt(-0), 0xD834);
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assertEquals("\uD834abc".codePointAt(0), 0xD834);
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assertEquals("\uD834abc".codePointAt(false), 0xD834);
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assertEquals("\uD834abc".codePointAt(NaN), 0xD834);
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assertEquals("\uD834abc".codePointAt(null), 0xD834);
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assertEquals("\uD834abc".codePointAt(undefined), 0xD834);
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// Lone low surrogates
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assertEquals("\uDF06abc".codePointAt(""), 0xDF06);
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assertEquals("\uDF06abc".codePointAt("_"), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(-1), undefined);
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assertEquals("\uDF06abc".codePointAt(-0), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(0), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(false), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(NaN), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(null), 0xDF06);
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assertEquals("\uDF06abc".codePointAt(undefined), 0xDF06);
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assertThrows(function() {
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String.prototype.codePointAt.call(undefined);
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}, TypeError);
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assertThrows(function() {
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String.prototype.codePointAt.call(undefined, 4);
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}, TypeError);
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assertThrows(function() {
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String.prototype.codePointAt.call(null);
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}, TypeError);
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assertThrows(function() {
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String.prototype.codePointAt.call(null, 4);
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}, TypeError);
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assertEquals(String.prototype.codePointAt.call(42, 0), 0x34);
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assertEquals(String.prototype.codePointAt.call(42, 1), 0x32);
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assertEquals(String.prototype.codePointAt.call({
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toString: function() { return "abc"; }
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}, 2), 0x63);
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var tmp = 0;
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assertEquals(String.prototype.codePointAt.call({
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toString: function() { ++tmp; return String(tmp); }
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}, 0), 0x31);
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assertEquals(tmp, 1);
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