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 // Flags: --expose-natives-as=builtins 29 30 // Checks that all function properties of the builtin object that are actually 31 // constructors (recognized by having properties on their .prototype object), 32 // have only unconfigurable properties on the prototype, and the methods 33 // are also non-writable. 34 35 var names = Object.getOwnPropertyNames(builtins); 36 37 function isFunction(obj) { 38 return typeof obj == "function"; 39 } 40 41 function isV8Native(name) { 42 return name == "GeneratorFunctionPrototype" || 43 name == "SetIterator" || 44 name == "MapIterator" || 45 name == "ArrayIterator" || 46 name == "StringIterator"; 47 } 48 49 function checkConstructor(func, name) { 50 // A constructor is a function with a prototype and properties on the 51 // prototype object besides "constructor"; 52 if (name.charAt(0) == "$") return; 53 if (typeof func.prototype != "object") return; 54 var propNames = Object.getOwnPropertyNames(func.prototype); 55 if (propNames.length == 0 || 56 (propNames.length == 1 && propNames[0] == "constructor")) { 57 // Not a constructor. 58 return; 59 } 60 var proto_desc = Object.getOwnPropertyDescriptor(func, "prototype"); 61 assertTrue(proto_desc.hasOwnProperty("value"), name); 62 assertFalse(proto_desc.writable, name); 63 assertFalse(proto_desc.configurable, name); 64 var prototype = proto_desc.value; 65 assertEquals(isV8Native(name) ? Object.prototype : null, 66 Object.getPrototypeOf(prototype), 67 name); 68 for (var i = 0; i < propNames.length; i++) { 69 var propName = propNames[i]; 70 if (propName == "constructor") continue; 71 if (isV8Native(name)) continue; 72 var testName = name + "-" + propName; 73 var propDesc = Object.getOwnPropertyDescriptor(prototype, propName); 74 assertTrue(propDesc.hasOwnProperty("value"), testName); 75 assertFalse(propDesc.configurable, testName); 76 if (isFunction(propDesc.value)) { 77 assertFalse(propDesc.writable, testName); 78 } 79 } 80 } 81 82 for (var i = 0; i < names.length; i++) { 83 var name = names[i]; 84 var desc = Object.getOwnPropertyDescriptor(builtins, name); 85 assertTrue(desc.hasOwnProperty("value")); 86 var value = desc.value; 87 if (isFunction(value)) { 88 checkConstructor(value, name); 89 } 90 } 91
