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); 130
