JezK
Edit File: array-join.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. // Test that array join calls toString on subarrays. var a = [[1,2],3,4,[5,6]]; assertEquals('1,2345,6', a.join('')); assertEquals('1,2*3*4*5,6', a.join('*')); assertEquals('1,2**3**4**5,6', a.join('**')); assertEquals('1,2****3****4****5,6', a.join('****')); assertEquals('1,2********3********4********5,6', a.join('********')); assertEquals('1,2**********3**********4**********5,6', a.join('**********')); // Create a cycle. a.push(a); assertEquals('1,2345,6', a.join('')); assertEquals('1,2*3*4*5,6*', a.join('*')); assertEquals('1,2**3**4**5,6**', a.join('**')); assertEquals('1,2****3****4****5,6****', a.join('****')); assertEquals('1,2********3********4********5,6********', a.join('********')); assertEquals('1,2**********3**********4**********5,6**********', a.join('**********')); // Replace array.prototype.toString. var oldToString = Array.prototype.toString; Array.prototype.toString = function() { return "array"; }; assertEquals('array34arrayarray', a.join('')); assertEquals('array*3*4*array*array', a.join('*')); assertEquals('array**3**4**array**array', a.join('**')); assertEquals('array****3****4****array****array', a.join('****')); assertEquals('array********3********4********array********array', a.join('********')); assertEquals('array**********3**********4**********array**********array', a.join('**********')); Array.prototype.toString = function() { throw 42; }; assertThrows("a.join('')"); assertThrows("a.join('*')"); assertThrows("a.join('**')"); assertThrows("a.join('****')"); assertThrows("a.join('********')"); assertThrows("a.join('**********')"); Array.prototype.toString = function() { return "array"; }; assertEquals('array34arrayarray', a.join('')); assertEquals('array*3*4*array*array', a.join('*')); assertEquals('array**3**4**array**array', a.join('**')); assertEquals('array****3****4****array****array', a.join('****')); assertEquals('array********3********4********array********array', a.join('********')); assertEquals('array**********3**********4**********array**********array', a.join('**********')); // Restore original toString. delete Array.prototype.toString; if (Array.prototype.toString != oldToString) { Array.prototype.toString = oldToString; } var a = new Array(123123); assertEquals(123122, String(a).length); assertEquals(123122, a.join(",").length); assertEquals(246244, a.join("oo").length); a = new Array(Math.pow(2,32) - 1); // Max length. assertEquals("", a.join("")); a[123123123] = "o"; a[1255215215] = "p"; assertEquals("op", a.join("")); a = new Array(100001); for (var i = 0; i < a.length; i++) a[i] = undefined; a[5] = "ab"; a[90000] = "cd"; assertEquals("abcd", a.join("")); // Must not throw.