Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // Number.prototype methods on non-Numbers. |
| 29 | |
| 30 | assertThrows(function() { Number.prototype.toExponential.call({}) }, |
| 31 | TypeError); |
| 32 | |
| 33 | assertThrows(function() { Number.prototype.toPrecision.call({}) }, |
| 34 | TypeError); |
| 35 | |
| 36 | assertThrows(function() { Number.prototype.toFixed.call({}) }, |
| 37 | TypeError); |
| 38 | |
| 39 | assertThrows(function() { Number.prototype.toString.call({}) }, |
| 40 | TypeError); |
| 41 | |
| 42 | assertThrows(function() { Number.prototype.toLocaleString.call({}) }, |
| 43 | TypeError); |
| 44 | |
| 45 | assertThrows(function() { Number.prototype.ValueOf.call({}) }, |
| 46 | TypeError); |
| 47 | |
| 48 | |
| 49 | // Call on Number objects with custom valueOf method. |
| 50 | |
| 51 | var x_obj = new Number(1); |
| 52 | x_obj.valueOf = function() { assertUnreachable(); }; |
| 53 | |
| 54 | assertEquals("1.00e+0", |
| 55 | Number.prototype.toExponential.call(x_obj, 2)); |
| 56 | |
| 57 | assertEquals("1.0", |
| 58 | Number.prototype.toPrecision.call(x_obj, 2)); |
| 59 | |
| 60 | assertEquals("1.00", |
| 61 | Number.prototype.toFixed.call(x_obj, 2)); |
| 62 | |
| 63 | // Call on primitive numbers. |
| 64 | assertEquals("1.00e+0", |
| 65 | Number.prototype.toExponential.call(1, 2)); |
| 66 | |
| 67 | assertEquals("1.0", |
| 68 | Number.prototype.toPrecision.call(1, 2)); |
| 69 | |
| 70 | assertEquals("1.00", |
| 71 | Number.prototype.toFixed.call(1, 2)); |
| 72 | |
| 73 | |
| 74 | // toExponential and toPrecision does following steps in order |
| 75 | // 1) convert the argument using ToInteger |
| 76 | // 2) check for non-finite receiver, on which it returns, |
| 77 | // 3) check argument range and throw exception if out of range. |
| 78 | // Note that the the last two steps are reversed for toFixed. |
| 79 | // Luckily, the receiver is expected to be a number or number |
| 80 | // wrapper, so that getting its value is not observable. |
| 81 | |
| 82 | var f_flag = false; |
| 83 | var f_obj = { valueOf: function() { f_flag = true; return 1000; } }; |
| 84 | |
| 85 | assertEquals("NaN", |
| 86 | Number.prototype.toExponential.call(NaN, f_obj)); |
| 87 | assertTrue(f_flag); |
| 88 | |
| 89 | f_flag = false; |
| 90 | assertEquals("Infinity", |
| 91 | Number.prototype.toExponential.call(1/0, f_obj)); |
| 92 | assertTrue(f_flag); |
| 93 | |
| 94 | f_flag = false; |
| 95 | assertEquals("-Infinity", |
| 96 | Number.prototype.toExponential.call(-1/0, f_obj)); |
| 97 | assertTrue(f_flag); |
| 98 | |
| 99 | f_flag = false; |
| 100 | assertEquals("NaN", |
| 101 | Number.prototype.toPrecision.call(NaN, f_obj)); |
| 102 | assertTrue(f_flag); |
| 103 | |
| 104 | f_flag = false; |
| 105 | assertEquals("Infinity", |
| 106 | Number.prototype.toPrecision.call(1/0, f_obj)); |
| 107 | assertTrue(f_flag); |
| 108 | |
| 109 | f_flag = false; |
| 110 | assertEquals("-Infinity", |
| 111 | Number.prototype.toPrecision.call(-1/0, f_obj)); |
| 112 | assertTrue(f_flag); |
| 113 | |
| 114 | // The odd man out: toFixed. |
| 115 | |
| 116 | f_flag = false; |
| 117 | assertThrows(function() { Number.prototype.toFixed.call(NaN, f_obj) }, |
| 118 | RangeError); |
| 119 | assertTrue(f_flag); |
| 120 | |
| 121 | f_flag = false; |
| 122 | assertThrows(function() { Number.prototype.toFixed.call(1/0, f_obj) }, |
| 123 | RangeError); |
| 124 | assertTrue(f_flag); |
| 125 | |
| 126 | f_flag = false; |
| 127 | assertThrows(function() { Number.prototype.toFixed.call(-1/0, f_obj) }, |
| 128 | RangeError); |
| 129 | assertTrue(f_flag); |