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| 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 AN
Y |
| 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 AN
Y |
| 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 O
N |
| 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).toPre
cision(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"); |
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