JezK
Edit File: call.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. function f0() { return this; } assertTrue(this === f0.call(), "1"); assertTrue(this === f0.call(this), "w"); assertTrue(this === f0.call(this, 1), "w"); assertTrue(this === f0.call(this, 1, 2), "w"); assertTrue(this === f0.call(null), "3a"); assertTrue(this === f0.call(null, 1), "3b"); assertTrue(this === f0.call(null, 1, 2), "3c"); assertTrue(this === f0.call(void 0), "4a"); assertTrue(this === f0.call(void 0, 1), "4b"); assertTrue(this === f0.call(void 0, 1, 2), "4c"); var x = {}; assertTrue(x === f0.call(x)); assertTrue(x === f0.call(x, 1)); assertTrue(x === f0.call(x, 1, 2)); function f1(a) { a = a || 'i'; return this[a]; } assertEquals(1, f1.call({i:1})); assertEquals(42, f1.call({i:42}, 'i')); assertEquals(87, f1.call({j:87}, 'j', 1)); assertEquals(99, f1.call({k:99}, 'k', 1, 2)); function f2(a, b) { a = a || 'n'; b = b || 2; return this[a] + b; } var x = {n: 1}; assertEquals(3, f2.call(x)); assertEquals(14, f2.call({i:12}, 'i')); assertEquals(42, f2.call(x, 'n', 41)); assertEquals(87, f2.call(x, 'n', 86, 1)); assertEquals(99, f2.call(x, 'n', 98, 1, 2)); function fn() { return arguments.length; } assertEquals(0, fn.call()); assertEquals(0, fn.call(this)); assertEquals(0, fn.call(null)); assertEquals(0, fn.call(void 0)); assertEquals(1, fn.call(this, 1)); assertEquals(2, fn.call(this, 1, 2)); assertEquals(3, fn.call(this, 1, 2, 3));