1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions 6 // are met: 7 // 1. Redistributions of source code must retain the above copyright 8 // notice, this list of conditions and the following disclaimer. 9 // 2. Redistributions in binary form must reproduce the above copyright 10 // notice, this list of conditions and the following disclaimer in the 11 // documentation and/or other materials provided with the distribution. 12 // 13 // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 24 description( 25 'This test checks a few Number.toPrecision cases, including ' + 26 '<a href="http://bugs.webkit.org/show_bug.cgi?id=15145">15145: (0.999).toPrecision(1) returns incorrect result</a>' + 27 '.'); 28 29 shouldBeEqualToString("(0.999).toPrecision(1)", "1"); 30 shouldBeEqualToString("(0.999).toPrecision(2)", "1.0"); 31 shouldBeEqualToString("(0.999).toPrecision(3)", "0.999"); 32 33 var posInf = 1/0; 34 var negInf = -1/0; 35 var nan = 0/0; 36 37 shouldBeEqualToString("(0.0).toPrecision(4)", "0.000"); 38 shouldBeEqualToString("(-0.0).toPrecision(4)", "0.000"); 39 shouldBeEqualToString("(0.0).toPrecision()", "0"); 40 shouldBeEqualToString("(-0.0).toPrecision()", "0"); 41 shouldBeEqualToString("(1234.567).toPrecision()", "1234.567"); 42 shouldThrow("(1234.567).toPrecision(0)"); 43 shouldThrow("(1234.567).toPrecision(null)"); // just like 0 44 shouldThrow("(1234.567).toPrecision(false)"); // just like 0 45 shouldThrow("(1234.567).toPrecision('foo')"); // just like 0 46 shouldThrow("(1234.567).toPrecision(-1)"); 47 shouldBeEqualToString("(1234.567).toPrecision(1)", "1e+3"); 48 shouldBeEqualToString("(1234.567).toPrecision(true)", "1e+3"); // just like 1 49 shouldBeEqualToString("(1234.567).toPrecision('1')", "1e+3"); // just like 1 50 shouldBeEqualToString("(1234.567).toPrecision(2)", "1.2e+3"); 51 shouldBeEqualToString("(1234.567).toPrecision(2.9)", "1.2e+3"); 52 shouldBeEqualToString("(1234.567).toPrecision(5)", "1234.6"); 53 shouldBeEqualToString("(1234.567).toPrecision(21)", "1234.56700000000000728"); 54 // SpiderMonkey allows precision values 1 to 100, we implement the spec and only allow 1 to 21. 55 shouldThrow("(1234.567).toPrecision(22)"); 56 shouldThrow("(1234.567).toPrecision(100)"); 57 shouldThrow("(1234.567).toPrecision(101)"); 58 59 shouldThrow("(1234.567).toPrecision(posInf)"); 60 shouldThrow("(1234.567).toPrecision(negInf)"); 61 shouldThrow("(1234.567).toPrecision(nan)"); // nan is treated like 0 62 63 shouldBeEqualToString("posInf.toPrecision()", "Infinity"); 64 shouldBeEqualToString("negInf.toPrecision()", "-Infinity"); 65 shouldBeEqualToString("nan.toPrecision()", "NaN"); 66
