1 // Copyright 2011 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 // Regression test for Chromium issue 70066. Delete should work properly 29 // from inside 'with' scopes. 30 // http://code.google.com/p/chromium/issues/detail?id=70066 31 32 x = 0; 33 34 // Delete on a slot from a function's own context. 35 function test1() { 36 var value = 1; 37 var status; 38 with ({}) { status = delete value; } 39 return value + ":" + status; 40 } 41 42 assertEquals("1:false", test1(), "test1"); 43 assertEquals(0, x, "test1"); // Global x is undisturbed. 44 45 46 // Delete on a slot from an outer context. 47 function test2() { 48 function f() { 49 with ({}) { return delete value; } 50 } 51 var value = 2; 52 var status = f(); 53 return value + ":" + status; 54 } 55 56 assertEquals("2:false", test2(), "test2"); 57 assertEquals(0, x, "test2"); // Global x is undisturbed. 58 59 60 // Delete on an argument. This hits the same code paths as test5 because 61 // 'with' forces all parameters to be indirected through the arguments 62 // object. 63 function test3(value) { 64 var status; 65 with ({}) { status = delete value; } 66 return value + ":" + status; 67 } 68 69 assertEquals("undefined:true", test3(3), "test3"); 70 assertEquals(0, x, "test3"); // Global x is undisturbed. 71 72 73 // Delete on an argument from an outer context. This hits the same code 74 // path as test2. 75 function test4(value) { 76 function f() { 77 with ({}) { return delete value; } 78 } 79 var status = f(); 80 return value + ":" + status; 81 } 82 83 assertEquals("4:false", test4(4), "test4"); 84 assertEquals(0, x, "test4"); // Global x is undisturbed. 85 86 87 // Delete on an argument found in the arguments object. Such properties are 88 // normally DONT_DELETE in JavaScript but deletion is allowed by V8. 89 function test5(value) { 90 var status; 91 with ({}) { status = delete value; } 92 return arguments[0] + ":" + status; 93 } 94 95 assertEquals("undefined:true", test5(5), "test5"); 96 assertEquals(0, x, "test5"); // Global x is undisturbed. 97 98 function test6(value) { 99 function f() { 100 with ({}) { return delete value; } 101 } 102 var status = f(); 103 return arguments[0] + ":" + status; 104 } 105 106 assertEquals("undefined:true", test6(6), "test6"); 107 assertEquals(0, x, "test6"); // Global x is undisturbed. 108 109 110 // Delete on a property found on 'with' object. 111 function test7(object) { 112 with (object) { return delete value; } 113 } 114 115 var o = {value: 7}; 116 assertEquals(true, test7(o), "test7"); 117 assertEquals(void 0, o.value, "test7"); 118 assertEquals(0, x, "test7"); // Global x is undisturbed. 119 120 121 // Delete on a global property. 122 function test8() { 123 with ({}) { return delete x; } 124 } 125 126 assertEquals(true, test8(), "test8"); 127 assertThrows("x", "test8"); // Global x should be deleted. 128 129 130 // Delete on a property that is not found anywhere. 131 function test9() { 132 with ({}) { return delete x; } 133 } 134 135 assertThrows("x", "test9"); // Make sure it's not there. 136 assertEquals(true, test9(), "test9"); 137 138 139 // Delete on a DONT_DELETE property of the global object. 140 var y = 10; 141 function test10() { 142 with ({}) { return delete y; } 143 } 144 145 assertEquals(false, test10(), "test10"); 146 assertEquals(10, y, "test10"); 147
