1 // Copyright 2010 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 29 // Flags: --expose-natives-as natives --allow-natives-syntax 30 // Test the SameValue and SameValueZero internal methods. 31 32 var obj1 = {x: 10, y: 11, z: "test"}; 33 var obj2 = {x: 10, y: 11, z: "test"}; 34 35 var sameValue = Object.is; 36 var sameValueZero = function(x, y) { return %SameValueZero(x, y); } 37 38 // Calls SameValue and SameValueZero and checks that their results match. 39 function sameValueBoth(a, b) { 40 var result = sameValue(a, b); 41 assertTrue(result === sameValueZero(a, b)); 42 return result; 43 } 44 45 // Calls SameValue and SameValueZero and checks that their results don't match. 46 function sameValueZeroOnly(a, b) { 47 var result = sameValueZero(a, b); 48 assertTrue(result && !sameValue(a, b)); 49 return result; 50 } 51 52 assertTrue(sameValueBoth(0, 0)); 53 assertTrue(sameValueBoth(+0, +0)); 54 assertTrue(sameValueBoth(-0, -0)); 55 assertTrue(sameValueBoth(1, 1)); 56 assertTrue(sameValueBoth(2, 2)); 57 assertTrue(sameValueBoth(-1, -1)); 58 assertTrue(sameValueBoth(0.5, 0.5)); 59 assertTrue(sameValueBoth(true, true)); 60 assertTrue(sameValueBoth(false, false)); 61 assertTrue(sameValueBoth(NaN, NaN)); 62 assertTrue(sameValueBoth(null, null)); 63 assertTrue(sameValueBoth("foo", "foo")); 64 assertTrue(sameValueBoth(obj1, obj1)); 65 // Undefined values. 66 assertTrue(sameValueBoth()); 67 assertTrue(sameValueBoth(undefined, undefined)); 68 69 assertFalse(sameValueBoth(0,1)); 70 assertFalse(sameValueBoth("foo", "bar")); 71 assertFalse(sameValueBoth(obj1, obj2)); 72 assertFalse(sameValueBoth(true, false)); 73 74 assertFalse(sameValueBoth(obj1, true)); 75 assertFalse(sameValueBoth(obj1, "foo")); 76 assertFalse(sameValueBoth(obj1, 1)); 77 assertFalse(sameValueBoth(obj1, undefined)); 78 assertFalse(sameValueBoth(obj1, NaN)); 79 80 assertFalse(sameValueBoth(undefined, true)); 81 assertFalse(sameValueBoth(undefined, "foo")); 82 assertFalse(sameValueBoth(undefined, 1)); 83 assertFalse(sameValueBoth(undefined, obj1)); 84 assertFalse(sameValueBoth(undefined, NaN)); 85 86 assertFalse(sameValueBoth(NaN, true)); 87 assertFalse(sameValueBoth(NaN, "foo")); 88 assertFalse(sameValueBoth(NaN, 1)); 89 assertFalse(sameValueBoth(NaN, obj1)); 90 assertFalse(sameValueBoth(NaN, undefined)); 91 92 assertFalse(sameValueBoth("foo", true)); 93 assertFalse(sameValueBoth("foo", 1)); 94 assertFalse(sameValueBoth("foo", obj1)); 95 assertFalse(sameValueBoth("foo", undefined)); 96 assertFalse(sameValueBoth("foo", NaN)); 97 98 assertFalse(sameValueBoth(true, 1)); 99 assertFalse(sameValueBoth(true, obj1)); 100 assertFalse(sameValueBoth(true, undefined)); 101 assertFalse(sameValueBoth(true, NaN)); 102 assertFalse(sameValueBoth(true, "foo")); 103 104 assertFalse(sameValueBoth(1, true)); 105 assertFalse(sameValueBoth(1, obj1)); 106 assertFalse(sameValueBoth(1, undefined)); 107 assertFalse(sameValueBoth(1, NaN)); 108 assertFalse(sameValueBoth(1, "foo")); 109 110 // Special string cases. 111 assertFalse(sameValueBoth("1", 1)); 112 assertFalse(sameValueBoth("true", true)); 113 assertFalse(sameValueBoth("false", false)); 114 assertFalse(sameValueBoth("undefined", undefined)); 115 assertFalse(sameValueBoth("NaN", NaN)); 116 117 // SameValue considers -0 and +0 to be different; SameValueZero considers 118 // -0 and +0 to be the same. 119 assertTrue(sameValueZeroOnly(+0, -0)); 120 assertTrue(sameValueZeroOnly(-0, +0)); 121