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| 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); |
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