JezK
Edit File: builtins.js
// Copyright 2011 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --expose-natives-as=builtins // Checks that all function properties of the builtin object that are actually // constructors (recognized by having properties on their .prototype object), // have only unconfigurable properties on the prototype, and the methods // are also non-writable. var names = Object.getOwnPropertyNames(builtins); function isFunction(obj) { return typeof obj == "function"; } function checkConstructor(func, name) { // A constructor is a function with a prototype and properties on the // prototype object besides "constructor"; if (name.charAt(0) == "$") return; if (typeof func.prototype != "object") return; var propNames = Object.getOwnPropertyNames(func.prototype); if (propNames.length == 0 || (propNames.length == 1 && propNames[0] == "constructor")) { // Not a constructor. return; } var proto_desc = Object.getOwnPropertyDescriptor(func, "prototype"); assertTrue(proto_desc.hasOwnProperty("value"), name); assertFalse(proto_desc.writable, name); assertFalse(proto_desc.configurable, name); var prototype = proto_desc.value; assertEquals(null, prototype.__proto__, name); for (var i = 0; i < propNames.length; i++) { var propName = propNames[i]; if (propName == "constructor") continue; var testName = name + "-" + propName; var propDesc = Object.getOwnPropertyDescriptor(prototype, propName); assertTrue(propDesc.hasOwnProperty("value"), testName); assertFalse(propDesc.configurable, testName); if (isFunction(propDesc.value)) { assertFalse(propDesc.writable, testName); } } } for (var i = 0; i < names.length; i++) { var name = names[i]; var desc = Object.getOwnPropertyDescriptor(builtins, name); assertTrue(desc.hasOwnProperty("value")); var value = desc.value; if (isFunction(value)) { checkConstructor(value, name); } }