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 // Test that setter accessors added to the prototype chain are called 29 // when setting properties. 30 31 // Test that accessors added to the prototype chain are called 32 // eventhough there are inline caches for setting the property 33 34 function F() { 35 this.x = 42; 36 this.y = 87; 37 } 38 39 // Force the inline caches to monomorphic state. 40 new F(); new F(); 41 42 // Add a setter for x to Object.prototype and make sure it gets 43 // called. 44 var result_x; 45 Object.prototype.__defineSetter__('x', function(value) { result_x = value; }); 46 var f = new F(); 47 assertEquals(42, result_x); 48 assertTrue(typeof f.x == 'undefined'); 49 50 // Add a setter for y by changing the prototype of f and make sure 51 // that gets called too. 52 var result_y; 53 var proto = new Object(); 54 proto.__defineSetter__('y', function (value) { result_y = value; }); 55 var f = new F(); 56 f.y = undefined; 57 f.__proto__ = proto; 58 F.call(f); 59 assertEquals(87, result_y); 60 assertTrue(typeof f.y == 'undefined'); 61 62 63 // Test the same issue in the runtime system. Make sure that 64 // accessors added to the prototype chain are called instead of 65 // following map transitions. 66 // 67 // Create two objects. 68 var result_z; 69 var o1 = new Object(); 70 var o2 = new Object(); 71 // Add a z property to o1 to create a map transition. 72 o1.z = 32; 73 // Add a z accessor in the prototype chain for o1 and o2. 74 Object.prototype.__defineSetter__('z', function(value) { result_z = value; }); 75 // The accessor should be called for o2. 76 o2.z = 27; 77 assertEquals(27, result_z); 78 assertTrue(typeof o2.z == 'undefined'); 79
