math-round.js revision 4515c472dc3e5ed2448a564600976759e569a0a8
1// Copyright 2010 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 28assertEquals(0, Math.round(0)); 29assertEquals(-0, Math.round(-0)); 30assertEquals(Infinity, Math.round(Infinity)); 31assertEquals(-Infinity, Math.round(-Infinity)); 32assertNaN(Math.round(NaN)); 33 34assertEquals(1, Math.round(0.5)); 35assertEquals(1, Math.round(0.7)); 36assertEquals(1, Math.round(1)); 37assertEquals(1, Math.round(1.1)); 38assertEquals(1, Math.round(1.49999)); 39assertEquals(1/-0, 1/Math.round(-0.5)); // Test for -0 result. 40assertEquals(-1, Math.round(-0.5000000000000001)); 41assertEquals(-1, Math.round(-0.7)); 42assertEquals(-1, Math.round(-1)); 43assertEquals(-1, Math.round(-1.1)); 44assertEquals(-1, Math.round(-1.49999)); 45assertEquals(-1, Math.round(-1.5)); 46 47assertEquals(9007199254740990, Math.round(9007199254740990)); 48assertEquals(9007199254740991, Math.round(9007199254740991)); 49assertEquals(-9007199254740990, Math.round(-9007199254740990)); 50assertEquals(-9007199254740991, Math.round(-9007199254740991)); 51assertEquals(Number.MAX_VALUE, Math.round(Number.MAX_VALUE)); 52assertEquals(-Number.MAX_VALUE, Math.round(-Number.MAX_VALUE)); 53