JezK
Edit File: value-wrapper.js
// Copyright 2008 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. // When calling user-defined functions on strings, booleans or // numbers, we should create a wrapper object. // When running the tests use loops to ensure that the call site moves through // the different IC states and that both the runtime system and the generated // IC code is tested. function RunTests() { for (var i = 0; i < 10; i++) { assertEquals('object', 'xxx'.TypeOfThis()); assertEquals('object', true.TypeOfThis(2,3)); assertEquals('object', false.TypeOfThis()); assertEquals('object', (42).TypeOfThis()); assertEquals('object', (3.14).TypeOfThis()); } for (var i = 0; i < 10; i++) { assertEquals('object', 'xxx'['TypeOfThis']()); assertEquals('object', true['TypeOfThis']()); assertEquals('object', false['TypeOfThis']()); assertEquals('object', (42)['TypeOfThis']()); assertEquals('object', (3.14)['TypeOfThis']()); } function CallTypeOfThis(obj) { assertEquals('object', obj.TypeOfThis()); } for (var i = 0; i < 10; i++) { CallTypeOfThis('xxx'); CallTypeOfThis(true); CallTypeOfThis(false); CallTypeOfThis(42); CallTypeOfThis(3.14); } function TestWithWith(obj) { with (obj) { for (var i = 0; i < 10; i++) { assertEquals('object', TypeOfThis()); } } } TestWithWith('xxx'); TestWithWith(true); TestWithWith(false); TestWithWith(42); TestWithWith(3.14); for (var i = 0; i < 10; i++) { assertEquals('object', true[7]()); assertEquals('object', false[7]()); assertEquals('object', (42)[7]()); assertEquals('object', (3.14)[7]()); } for (var i = 0; i < 10; i++) { assertEquals('object', typeof 'xxx'.ObjectValueOf()); assertEquals('object', typeof true.ObjectValueOf()); assertEquals('object', typeof false.ObjectValueOf()); assertEquals('object', typeof (42).ObjectValueOf()); assertEquals('object', typeof (3.14).ObjectValueOf()); } for (var i = 0; i < 10; i++) { assertEquals('[object String]', 'xxx'.ObjectToString()); assertEquals('[object Boolean]', true.ObjectToString()); assertEquals('[object Boolean]', false.ObjectToString()); assertEquals('[object Number]', (42).ObjectToString()); assertEquals('[object Number]', (3.14).ObjectToString()); } } function TypeOfThis() { return typeof this; } // Test with normal setup of prototype. String.prototype.TypeOfThis = TypeOfThis; Boolean.prototype.TypeOfThis = TypeOfThis; Number.prototype.TypeOfThis = TypeOfThis; Boolean.prototype[7] = TypeOfThis; Number.prototype[7] = TypeOfThis; String.prototype.ObjectValueOf = Object.prototype.valueOf; Boolean.prototype.ObjectValueOf = Object.prototype.valueOf; Number.prototype.ObjectValueOf = Object.prototype.valueOf; String.prototype.ObjectToString = Object.prototype.toString; Boolean.prototype.ObjectToString = Object.prototype.toString; Number.prototype.ObjectToString = Object.prototype.toString; RunTests(); // Run test after properties have been set to a different value. String.prototype.TypeOfThis = 'x'; Boolean.prototype.TypeOfThis = 'x'; Number.prototype.TypeOfThis = 'x'; Boolean.prototype[7] = 'x'; Number.prototype[7] = 'x'; String.prototype.TypeOfThis = TypeOfThis; Boolean.prototype.TypeOfThis = TypeOfThis; Number.prototype.TypeOfThis = TypeOfThis; Boolean.prototype[7] = TypeOfThis; Number.prototype[7] = TypeOfThis; RunTests(); // Force the prototype into slow case and run the test again. delete String.prototype.TypeOfThis; delete Boolean.prototype.TypeOfThis; delete Number.prototype.TypeOfThis; Boolean.prototype[7]; Number.prototype[7]; String.prototype.TypeOfThis = TypeOfThis; Boolean.prototype.TypeOfThis = TypeOfThis; Number.prototype.TypeOfThis = TypeOfThis; Boolean.prototype[7] = TypeOfThis; Number.prototype[7] = TypeOfThis; RunTests(); // According to ES3 15.3.4.3 the this value passed to Function.prototyle.apply // should wrapped. According to ES5 it should not. assertEquals('object', TypeOfThis.apply('xxx', [])); assertEquals('object', TypeOfThis.apply(true, [])); assertEquals('object', TypeOfThis.apply(false, [])); assertEquals('object', TypeOfThis.apply(42, [])); assertEquals('object', TypeOfThis.apply(3.14, [])); // According to ES3 15.3.4.3 the this value passed to Function.prototyle.call // should wrapped. According to ES5 it should not. assertEquals('object', TypeOfThis.call('xxx')); assertEquals('object', TypeOfThis.call(true)); assertEquals('object', TypeOfThis.call(false)); assertEquals('object', TypeOfThis.call(42)); assertEquals('object', TypeOfThis.call(3.14));