deps/v8/test/mjsunit/es6/string-fromcodepoint.js

   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.fromCodePoint
   7
   8 assertEquals(String.fromCodePoint.length, 1);
   9 assertEquals(String.propertyIsEnumerable("fromCodePoint"), false);
  10
  11 assertEquals(String.fromCodePoint(""), "\0");
  12 assertEquals(String.fromCodePoint(), "");
  13 assertEquals(String.fromCodePoint(-0), "\0");
  14 assertEquals(String.fromCodePoint(0), "\0");
  15 assertEquals(String.fromCodePoint(0x1D306), "\uD834\uDF06");
  16 assertEquals(
  17     String.fromCodePoint(0x1D306, 0x61, 0x1D307),
  18     "\uD834\uDF06a\uD834\uDF07");
  19 assertEquals(String.fromCodePoint(0x61, 0x62, 0x1D307), "ab\uD834\uDF07");
  20 assertEquals(String.fromCodePoint(false), "\0");
  21 assertEquals(String.fromCodePoint(null), "\0");
  22
  23 assertThrows(function() { String.fromCodePoint("_"); }, RangeError);
  24 assertThrows(function() { String.fromCodePoint("+Infinity"); }, RangeError);
  25 assertThrows(function() { String.fromCodePoint("-Infinity"); }, RangeError);
  26 assertThrows(function() { String.fromCodePoint(-1); }, RangeError);
  27 assertThrows(function() { String.fromCodePoint(0x10FFFF + 1); }, RangeError);
  28 assertThrows(function() { String.fromCodePoint(3.14); }, RangeError);
  29 assertThrows(function() { String.fromCodePoint(3e-2); }, RangeError);
  30 assertThrows(function() { String.fromCodePoint(-Infinity); }, RangeError);
  31 assertThrows(function() { String.fromCodePoint(+Infinity); }, RangeError);
  32 assertThrows(function() { String.fromCodePoint(NaN); }, RangeError);
  33 assertThrows(function() { String.fromCodePoint(undefined); }, RangeError);
  34 assertThrows(function() { String.fromCodePoint({}); }, RangeError);
  35 assertThrows(function() { String.fromCodePoint(/./); }, RangeError);
  36 assertThrows(function() { String.fromCodePoint({
  37   valueOf: function() { throw Error(); } });
  38 }, Error);
  39 assertThrows(function() { String.fromCodePoint({
  40   valueOf: function() { throw Error(); } });
  41 }, Error);
  42 var tmp = 0x60;
  43 assertEquals(String.fromCodePoint({
  44   valueOf: function() { ++tmp; return tmp; }
  45 }), "a");
  46 assertEquals(tmp, 0x61);
  47
  48 var counter = Math.pow(2, 15) * 3 / 2;
  49 var result = [];
  50 while (--counter >= 0) {
  51   result.push(0); // one code unit per symbol
  52 }
  53 String.fromCodePoint.apply(null, result); // must not throw
  54
  55 var counter = Math.pow(2, 15) * 3 / 2;
  56 var result = [];
  57 while (--counter >= 0) {
  58   result.push(0xFFFF + 1); // two code units per symbol
  59 }
  60 String.fromCodePoint.apply(null, result); // must not throw