JezK
Edit File: array-pop.js
// Copyright 2010 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. // Check pops with various number of arguments. (function() { var a = []; for (var i = 0; i < 7; i++) { a = [7, 6, 5, 4, 3, 2, 1]; assertEquals(1, a.pop(), "1st pop"); assertEquals(6, a.length, "length 1st pop"); assertEquals(2, a.pop(1), "2nd pop"); assertEquals(5, a.length, "length 2nd pop"); assertEquals(3, a.pop(1, 2), "3rd pop"); assertEquals(4, a.length, "length 3rd pop"); assertEquals(4, a.pop(1, 2, 3), "4th pop"); assertEquals(3, a.length, "length 4th pop"); assertEquals(5, a.pop(), "5th pop"); assertEquals(2, a.length, "length 5th pop"); assertEquals(6, a.pop(), "6th pop"); assertEquals(1, a.length, "length 6th pop"); assertEquals(7, a.pop(), "7th pop"); assertEquals(0, a.length, "length 7th pop"); assertEquals(undefined, a.pop(), "8th pop"); assertEquals(0, a.length, "length 8th pop"); assertEquals(undefined, a.pop(1, 2, 3), "9th pop"); assertEquals(0, a.length, "length 9th pop"); } // Check that pop works on inherited properties. for (var i = 0; i < 10 ;i++) { // Ensure ICs are stabilized. Array.prototype[1] = 1; Array.prototype[3] = 3; Array.prototype[5] = 5; Array.prototype[7] = 7; Array.prototype[9] = 9; a = [0,1,2,,4,,6,7,8,,]; assertEquals(10, a.length, "inherit-initial-length"); for (var j = 9; j >= 0; j--) { assertEquals(j + 1, a.length, "inherit-pre-length-" + j); assertTrue(j in a, "has property " + j); var own = a.hasOwnProperty(j); var inherited = Array.prototype.hasOwnProperty(j); assertEquals(j, a.pop(), "inherit-pop"); assertEquals(j, a.length, "inherit-post-length"); assertFalse(a.hasOwnProperty(j), "inherit-deleted-own-" + j); assertEquals(inherited, Array.prototype.hasOwnProperty(j), "inherit-not-deleted-inherited" + j); } Array.prototype.length = 0; // Clean-up. } // Check that pop works on inherited properties for // arrays with array prototype. for (var i = 0; i < 10 ;i++) { // Ensure ICs are stabilized. var array_proto = []; array_proto[1] = 1; array_proto[3] = 3; array_proto[5] = 5; array_proto[7] = 7; array_proto[9] = 9; a = [0,1,2,,4,,6,7,8,,]; a.__proto__ = array_proto; assertEquals(10, a.length, "array_proto-inherit-initial-length"); for (var j = 9; j >= 0; j--) { assertEquals(j + 1, a.length, "array_proto-inherit-pre-length-" + j); assertTrue(j in a, "array_proto-has property " + j); var own = a.hasOwnProperty(j); var inherited = array_proto.hasOwnProperty(j); assertEquals(j, a.pop(), "array_proto-inherit-pop"); assertEquals(j, a.length, "array_proto-inherit-post-length"); assertFalse(a.hasOwnProperty(j), "array_proto-inherit-deleted-own-" + j); assertEquals(inherited, array_proto.hasOwnProperty(j), "array_proto-inherit-not-deleted-inherited" + j); } } // Check that pop works on inherited properties for // arrays with array prototype. })(); // Test the case of not JSArray receiver. // Regression test for custom call generators, see issue 684. (function() { var a = []; for (var i = 0; i < 100; i++) a.push(i); var x = {__proto__: a}; for (var i = 0; i < 100; i++) { assertEquals(99 - i, x.pop(), i + 'th iteration'); } })();