106 lines
3.4 KiB
Java
106 lines
3.4 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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* @library /test/lib
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* @build Tests
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* @run main SqrtTests
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* @bug 8302040
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* @summary Tests for {Math, StrictMath}.sqrt
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*/
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public class SqrtTests {
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private SqrtTests(){}
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public static void main(String... argv) {
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int failures = 0;
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failures += testSqrt();
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if (failures > 0) {
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System.err.println("Testing sqrt 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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* "Returns the correctly rounded positive square root of a double value. 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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*
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* If the argument is positive infinity, then the result is positive infinity.
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*
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* If the argument is positive zero or negative zero, then the
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* result is the same as the argument.
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*
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* Otherwise, the result is the double value closest to the true
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* mathematical square root of the argument value."
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*/
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private static int testSqrt() {
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int failures = 0;
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for(double nan : Tests.NaNs) {
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failures += testSqrtCase(nan, NaNd);
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}
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double [][] testCases = {
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{InfinityD, InfinityD},
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{-Double.MIN_VALUE, NaNd},
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{-Double.MIN_NORMAL, NaNd},
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{-Double.MAX_VALUE, NaNd},
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{-InfinityD, NaNd},
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{+0.0, +0.0},
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{-0.0, -0.0},
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// Test some notable perfect squares
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{+0.25, +0.5},
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{+1.0, +1.0},
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{+4.0, +2.0},
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{+9.0, +3.0},
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{+0x1.ffffff0000002p1023, +0x1.ffffff8p511}
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};
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for(int i = 0; i < testCases.length; i++) {
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failures += testSqrtCase(testCases[i][0], testCases[i][1]);
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}
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return failures;
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}
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private static int testSqrtCase(double input, double expected) {
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int failures=0;
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failures+=Tests.test("Math.sqrt", input, Math::sqrt, expected);
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failures+=Tests.test("StrictMath.sqrt", input, StrictMath::sqrt, expected);
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return failures;
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}
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}
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