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