1 // Copyright 2008 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 // Flags: --expose-gc 29 30 function for_in_null() { 31 try { 32 for (var x in null) { 33 return false; 34 } 35 } catch(e) { 36 return false; 37 } 38 return true; 39 } 40 41 function for_in_undefined() { 42 try { 43 for (var x in undefined) { 44 return false; 45 } 46 } catch(e) { 47 return false; 48 } 49 return true; 50 } 51 52 for (var i = 0; i < 10; ++i) { 53 assertTrue(for_in_null()); 54 gc(); 55 } 56 57 for (var j = 0; j < 10; ++j) { 58 assertTrue(for_in_undefined()); 59 gc(); 60 } 61 62 assertEquals(10, i); 63 assertEquals(10, j); 64 65 66 function Accumulate(x) { 67 var accumulator = ""; 68 for (var i in x) { 69 accumulator += i; 70 } 71 return accumulator; 72 } 73 74 for (var i = 0; i < 3; ++i) { 75 var elements = Accumulate("abcd"); 76 // We do not assume that for-in enumerates elements in order. 77 assertTrue(-1 != elements.indexOf("0")); 78 assertTrue(-1 != elements.indexOf("1")); 79 assertTrue(-1 != elements.indexOf("2")); 80 assertTrue(-1 != elements.indexOf("3")); 81 assertEquals(4, elements.length); 82 } 83 84 function for_in_string_prototype() { 85 86 var x = new String("abc"); 87 x.foo = 19; 88 function B() { 89 this.bar = 5; 90 this[7] = 4; 91 } 92 B.prototype = x; 93 94 var y = new B(); 95 y.gub = 13; 96 97 var elements = Accumulate(y); 98 var elements1 = Accumulate(y); 99 // If for-in returns elements in a different order on multiple calls, this 100 // assert will fail. If that happens, consider if that behavior is OK. 101 assertEquals(elements, elements1, "For-in elements not the same both times."); 102 // We do not assume that for-in enumerates elements in order. 103 assertTrue(-1 != elements.indexOf("0")); 104 assertTrue(-1 != elements.indexOf("1")); 105 assertTrue(-1 != elements.indexOf("2")); 106 assertTrue(-1 != elements.indexOf("7")); 107 assertTrue(-1 != elements.indexOf("foo")); 108 assertTrue(-1 != elements.indexOf("bar")); 109 assertTrue(-1 != elements.indexOf("gub")); 110 assertEquals(13, elements.length); 111 112 elements = Accumulate(x); 113 assertTrue(-1 != elements.indexOf("0")); 114 assertTrue(-1 != elements.indexOf("1")); 115 assertTrue(-1 != elements.indexOf("2")); 116 assertTrue(-1 != elements.indexOf("foo")); 117 assertEquals(6, elements.length); 118 } 119 120 for_in_string_prototype(); 121 for_in_string_prototype(); 122
