1 // Copyright 2013 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 assertEquals("Infinity", String(1/Math.sign(0))); 29 assertEquals("-Infinity", String(1/Math.sign(-0))); 30 assertEquals(1, Math.sign(100)); 31 assertEquals(-1, Math.sign(-199)); 32 assertEquals(1, Math.sign(100.1)); 33 assertTrue(isNaN(Math.sign("abc"))); 34 assertTrue(isNaN(Math.sign({}))); 35 assertEquals(0, Math.sign([])); 36 assertEquals(1, Math.sign([1])); 37 assertEquals(-1, Math.sign([-100.1])); 38 assertTrue(isNaN(Math.sign([1, 1]))); 39 assertEquals(1, Math.sign({ toString: function() { return "100"; } })); 40 assertEquals(1, Math.sign({ toString: function() { return 100; } })); 41 assertEquals(-1, Math.sign({ valueOf: function() { return -1.1; } })); 42 assertEquals(-1, Math.sign({ valueOf: function() { return "-1.1"; } })); 43 assertEquals(-1, Math.sign(-Infinity)); 44 assertEquals(1, Math.sign(Infinity)); 45 assertEquals(-1, Math.sign("-Infinity")); 46 assertEquals(1, Math.sign("Infinity")); 47
