1// Copyright 2009 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Test some expression contexts involving short-circuit boolean 29// operations that did not otherwise have test coverage. 30 31 32var x = 42; 33 34// Literals in value/test context. 35assertEquals(x, function () { return 0 || x }()); 36assertEquals(1, function () { return 1 || x }()); 37 38// Literals in test/value context. 39assertEquals(0, function () { return 0 && x }()); 40assertEquals(x, function () { return 1 && x }()); 41 42// A value on top of the stack in value/test context. 43assertEquals(x, function(y) { return y++ || x }(0)); 44assertEquals(1, function(y) { return y++ || x }(1)); 45 46// A value on top of the stack in a test/value context. 47assertEquals(0, function(y) { return y++ && x }(0)); 48assertEquals(x, function(y) { return y++ && x }(1)); 49 50// An object literal in value context. 51assertEquals(0, function () { return {x: 0}}().x); 52 53// An object literal in value/test context. 54assertEquals(0, function () { return {x: 0} || this }().x); 55 56// An object literal in test/value context. 57assertEquals(x, function () { return {x: 0} && this }().x); 58 59// An array literal in value/test context. 60assertEquals(0, function () { return [0,1] || new Array(x,1) }()[0]); 61 62// An array literal in test/value context. 63assertEquals(x, function () { return [0,1] && new Array(x,1) }()[0]); 64 65// Slot assignment in value/test context. 66assertEquals(x, function (y) { return (y = 0) || x }("?")); 67assertEquals(1, function (y) { return (y = 1) || x }("?")); 68 69// Slot assignment in test/value context. 70assertEquals(0, function (y) { return (y = 0) && x }("?")); 71assertEquals(x, function (y) { return (y = 1) && x }("?")); 72 73// void in value context. 74assertEquals(void 0, function () { return void x }()); 75 76// void in value/test context. 77assertEquals(x, function () { return (void x) || x }()); 78 79// void in test/value context. 80assertEquals(void 0, function () { return (void x) && x }()); 81 82// Unary not in value context. 83assertEquals(false, function () { return !x }()); 84 85// Unary not in value/test context. 86assertEquals(true, function (y) { return !y || x }(0)); 87assertEquals(x, function (y) { return !y || x }(1)); 88 89// Unary not in test/value context. 90assertEquals(x, function (y) { return !y && x }(0)); 91assertEquals(false, function (y) { return !y && x }(1)); 92 93// Comparison in value context. 94assertEquals(false, function () { return x < x; }()); 95 96// Comparison in value/test context. 97assertEquals(x, function () { return x < x || x; }()); 98assertEquals(true, function () { return x <= x || x; }()); 99 100// Comparison in test/value context. 101assertEquals(false, function () { return x < x && x; }()); 102assertEquals(x, function () { return x <= x && x; }()); 103