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Edit File: unary-add.js
// Copyright 2009 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 unary addition in various contexts. // Test value context. assertEquals(1, +'1'); assertEquals(1, +1); assertEquals(1.12, +1.12); assertEquals(NaN, +undefined); assertEquals(NaN, +{}); // Test effect context. assertEquals(1, eval("+'1'; 1")); assertEquals(1, eval("+1; 1")); assertEquals(1, eval("+1.12; 1")); assertEquals(1, eval("+undefined; 1")); assertEquals(1, eval("+{}; 1")); // Test test context. assertEquals(1, (+'1') ? 1 : 2); assertEquals(1, (+1) ? 1 : 2); assertEquals(1, (+'0') ? 2 : 1); assertEquals(1, (+0) ? 2 : 1); assertEquals(1, (+1.12) ? 1 : 2); assertEquals(1, (+undefined) ? 2 : 1); assertEquals(1, (+{}) ? 2 : 1); // Test value/test context. assertEquals(1, +'1' || 2); assertEquals(1, +1 || 2); assertEquals(1.12, +1.12 || 2); assertEquals(2, +undefined || 2); assertEquals(2, +{} || 2); // Test test/value context. assertEquals(2, +'1' && 2); assertEquals(2, +1 && 2); assertEquals(0, +'0' && 2); assertEquals(0, +0 && 2); assertEquals(2, +1.12 && 2); assertEquals(NaN, +undefined && 2); assertEquals(NaN, +{} && 2);