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/*
* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8301202
* @build Tests
* @build LogTests
* @run main LogTests
* @summary Tests for {Math, StrictMath}.log
*/
public class LogTests {
private LogTests(){}
public static void main(String... args) {
int failures = 0;
failures += testLogSpecialCases();
if (failures > 0) {
System.err.println("Testing log incurred "
+ failures + " failures.");
throw new RuntimeException();
}
}
private static final double infinityD = Double.POSITIVE_INFINITY;
private static final double NaNd = Double.NaN;
/**
* From the spec for Math.log:
* "Special cases:
*
* If the argument is NaN or less than zero, then the result is NaN.
* If the argument is positive infinity, then the result is positive infinity.
* If the argument is positive zero or negative zero, then the result is negative infinity.
* If the argument is 1.0, then the result is positive zero.
*/
private static int testLogSpecialCases() {
int failures = 0;
double [][] testCases = {
{Double.NaN, NaNd},
{Double.NEGATIVE_INFINITY, NaNd},
{-Double.MAX_VALUE, NaNd},
{-1.0, NaNd},
{-Double.MIN_NORMAL, NaNd},
{-Double.MIN_VALUE, NaNd},
{Double.POSITIVE_INFINITY, infinityD},
{-0.0, -infinityD},
{+0.0, -infinityD},
{+1.0, 0.0},
};
for(int i = 0; i < testCases.length; i++) {
failures += testLogCase(testCases[i][0],
testCases[i][1]);
}
return failures;
}
private static int testLogCase(double input, double expected) {
int failures=0;
failures+=Tests.test("Math.log", input, Math::log, expected);
failures+=Tests.test("StrictMath.log", input, StrictMath::log, expected);
return failures;
}
}
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