Migrate more tests from blink repository.

test/webkit/fast/js/number-toprecision.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  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.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+
+description(
+    'This test checks a few Number.toPrecision cases, including ' +
+    '<a href="http://bugs.webkit.org/show_bug.cgi?id=15145">15145: (0.999).toPrecision(1) returns incorrect result</a>' +
+    '.');
+
+shouldBeEqualToString("(0.999).toPrecision(1)", "1");
+shouldBeEqualToString("(0.999).toPrecision(2)", "1.0");
+shouldBeEqualToString("(0.999).toPrecision(3)", "0.999");
+
+var posInf = 1/0;
+var negInf = -1/0;
+var nan = 0/0;
+
+shouldBeEqualToString("(0.0).toPrecision(4)", "0.000");
+shouldBeEqualToString("(-0.0).toPrecision(4)", "0.000");
+shouldBeEqualToString("(0.0).toPrecision()", "0");
+shouldBeEqualToString("(-0.0).toPrecision()", "0");
+shouldBeEqualToString("(1234.567).toPrecision()", "1234.567");
+shouldThrow("(1234.567).toPrecision(0)");
+shouldThrow("(1234.567).toPrecision(null)"); // just like 0
+shouldThrow("(1234.567).toPrecision(false)"); // just like 0
+shouldThrow("(1234.567).toPrecision('foo')"); // just like 0
+shouldThrow("(1234.567).toPrecision(-1)");
+shouldBeEqualToString("(1234.567).toPrecision(1)", "1e+3");
+shouldBeEqualToString("(1234.567).toPrecision(true)", "1e+3"); // just like 1
+shouldBeEqualToString("(1234.567).toPrecision('1')", "1e+3"); // just like 1
+shouldBeEqualToString("(1234.567).toPrecision(2)", "1.2e+3");
+shouldBeEqualToString("(1234.567).toPrecision(2.9)", "1.2e+3");
+shouldBeEqualToString("(1234.567).toPrecision(5)", "1234.6");
+shouldBeEqualToString("(1234.567).toPrecision(21)", "1234.56700000000000728");
+// SpiderMonkey allows precision values 1 to 100, we implement the spec and only allow 1 to 21.
+shouldThrow("(1234.567).toPrecision(22)");
+shouldThrow("(1234.567).toPrecision(100)");
+shouldThrow("(1234.567).toPrecision(101)");
+
+shouldThrow("(1234.567).toPrecision(posInf)");
+shouldThrow("(1234.567).toPrecision(negInf)");
+shouldThrow("(1234.567).toPrecision(nan)"); // nan is treated like 0
+
+shouldBeEqualToString("posInf.toPrecision()", "Infinity");
+shouldBeEqualToString("negInf.toPrecision()", "-Infinity");
+shouldBeEqualToString("nan.toPrecision()", "NaN");