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Java example source code file (PowTests.java)
The PowTests.java Java example source code/* * Copyright (c) 2003, 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 4916097 * @summary Some exponent over/undeflow tests for the pow method * @author Joseph D. Darcy */ import java.math.*; public class PowTests { static int zeroAndOneTests() { int failures = 0; BigDecimal[][] testCases = { {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)}, {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(1), BigDecimal.valueOf(0, Integer.MAX_VALUE)}, {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(2), BigDecimal.valueOf(0, Integer.MAX_VALUE)}, {BigDecimal.valueOf(0, Integer.MAX_VALUE), new BigDecimal(999999999), BigDecimal.valueOf(0, Integer.MAX_VALUE)}, {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)}, {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(1), BigDecimal.valueOf(0, Integer.MIN_VALUE)}, {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(2), BigDecimal.valueOf(0, Integer.MIN_VALUE)}, {BigDecimal.valueOf(0, Integer.MIN_VALUE), new BigDecimal(999999999), BigDecimal.valueOf(0, Integer.MIN_VALUE)}, {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)}, {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(1), BigDecimal.valueOf(1, Integer.MAX_VALUE)}, {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(2), null}, // overflow {BigDecimal.valueOf(1, Integer.MAX_VALUE), new BigDecimal(999999999), null}, // overflow {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(0), BigDecimal.valueOf(1, 0)}, {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(1), BigDecimal.valueOf(1, Integer.MIN_VALUE)}, {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(2), null}, // underflow {BigDecimal.valueOf(1, Integer.MIN_VALUE), new BigDecimal(999999999), null}, // underflow }; for(BigDecimal[] testCase: testCases) { int exponent = testCase[1].intValueExact(); BigDecimal result; try{ result = testCase[0].pow(exponent); if (!result.equals(testCase[2]) ) { failures++; System.err.println("Unexpected result while raising " + testCase[0] + " to the " + exponent + " power; expected " + testCase[2] + ", got " + result + "."); } } catch (ArithmeticException e) { if (testCase[2] != null) { failures++; System.err.println("Unexpected exception while raising " + testCase[0] + " to the " + exponent + " power."); } } } return failures; } public static void main(String argv[]) { int failures = 0; failures += zeroAndOneTests(); if (failures > 0) { throw new RuntimeException("Incurred " + failures + " failures while testing pow methods."); } } } Other Java examples (source code examples)Here is a short list of links related to this Java PowTests.java source code file: |
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