/* * Copyright (c) 2003, 2022, 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 4347132 8136799 * @key randomness * @library /test/lib * @build jdk.test.lib.RandomFactory * @build Tests * @build FdlibmTranslit * @build CubeRootTests * @run main CubeRootTests * @summary Tests specifically for StrictMath.cbrt import jdk.test.lib.RandomFactory;/** * The tests in ../Math/CubeRootTests.java test properties that should * hold for any cube root implementation, including the FDLIBM-based * one required for StrictMath.cbrt. Therefore, the test cases in * ../Math/CubeRootTests.java are run against both the Math and * StrictMath versions of cube root. The role of this test is to * verify that the FDLIBM cbrt algorithm is being used by running * golden file tests on values that may vary from one conforming cube * root implementation to another. public class CubeRootTests {private CubeRootTests(){}public static void main(String [] argv) {int failures = 0;if (failures > 0) {"Testing the cube root incurred " " failures." );throw new RuntimeException();static int testCubeRootCase(double input, double expected) {int failures=0;double minus_input = -input;double minus_expected = -expected;"StrictMath.cbrt(double)" , input,"StrictMath.cbrt(double)" , minus_input,return failures;static int testCubeRoot() {int failures = 0;double [][] testCases = {for (double [] testCase: testCases)return failures;// Initialize shared random number generator private static java.util.Random random = RandomFactory.getRandom();/** * Test StrictMath.cbrt against transliteration port of cbrt. private static int testAgainstTranslit() {int failures = 0;double x;// Test just above subnormal threshold... Double .MIN_NORMAL;// ... and just below subnormal threshold ... Double .MIN_NORMAL);// ... and near zero. Double .MIN_VALUE, 1000);// Make the increment twice the ulp value in case the random // value is near an exponent threshold. Don't worry about test // elements overflowing to infinity if the starting value is // near Double.MAX_VALUE. return failures;private static int testRange(double start, double increment, int count) {int failures = 0;double x = start;for (int i = 0; i < count; i++, x += increment) {return failures;quality 92%
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