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Commons Math example source code file (BigRealTest.java)
The Commons Math BigRealTest.java source code/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.math.util; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import java.math.BigDecimal; import java.math.BigInteger; import java.math.MathContext; import org.apache.commons.math.TestUtils; import org.junit.Test; public class BigRealTest { @Test public void testConstructor() { assertEquals(1.625, new BigReal(new BigDecimal("1.625")).doubleValue(), 1.0e-15); assertEquals(-5.0, new BigReal(new BigInteger("-5")).doubleValue(), 1.0e-15); assertEquals(-5.0, new BigReal(new BigInteger("-5"), MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(0.125, new BigReal(new BigInteger("125"), 3).doubleValue(), 1.0e-15); assertEquals(0.125, new BigReal(new BigInteger("125"), 3, MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal(new char[] { '1', '.', '6', '2', '5' }).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal(new char[] { 'A', 'A', '1', '.', '6', '2', '5', '9' }, 2, 5).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal(new char[] { 'A', 'A', '1', '.', '6', '2', '5', '9' }, 2, 5, MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal(new char[] { '1', '.', '6', '2', '5' }, MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal(1.625).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal(1.625, MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(-5.0, new BigReal(-5).doubleValue(), 1.0e-15); assertEquals(-5.0, new BigReal(-5, MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(-5.0, new BigReal(-5l).doubleValue(), 1.0e-15); assertEquals(-5.0, new BigReal(-5l, MathContext.DECIMAL64).doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal("1.625").doubleValue(), 1.0e-15); assertEquals(1.625, new BigReal("1.625", MathContext.DECIMAL64).doubleValue(), 1.0e-15); } @Test public void testCompareTo() { BigReal first = new BigReal(1.0 / 2.0); BigReal second = new BigReal(1.0 / 3.0); BigReal third = new BigReal(1.0 / 2.0); assertEquals(0, first.compareTo(first)); assertEquals(0, first.compareTo(third)); assertEquals(1, first.compareTo(second)); assertEquals(-1, second.compareTo(first)); } public void testAdd() { BigReal a = new BigReal("1.2345678"); BigReal b = new BigReal("8.7654321"); assertEquals(9.9999999, a.add(b).doubleValue(), 1.0e-15); } public void testSubtract() { BigReal a = new BigReal("1.2345678"); BigReal b = new BigReal("8.7654321"); assertEquals( -7.5308643, a.subtract(b).doubleValue(), 1.0e-15); } public void testDivide() { BigReal a = new BigReal("1.0000000000"); BigReal b = new BigReal("0.0009765625"); assertEquals(1024.0, a.divide(b).doubleValue(), 1.0e-15); } public void testMultiply() { BigReal a = new BigReal("1024.0"); BigReal b = new BigReal("0.0009765625"); assertEquals(1.0, a.multiply(b).doubleValue(), 1.0e-15); } @Test public void testDoubleValue() { assertEquals(0.5, new BigReal(0.5).doubleValue(), 1.0e-15); } @Test public void testBigDecimalValue() { BigDecimal pi = new BigDecimal("3.1415926535897932384626433832795028841971693993751"); assertEquals(pi, new BigReal(pi).bigDecimalValue()); assertEquals(new BigDecimal(0.5), new BigReal(1.0 / 2.0).bigDecimalValue()); } @Test public void testEqualsAndHashCode() { BigReal zero = new BigReal(0.0); BigReal nullReal = null; assertTrue(zero.equals(zero)); assertFalse(zero.equals(nullReal)); assertFalse(zero.equals(Double.valueOf(0))); BigReal zero2 = new BigReal(0.0); assertTrue(zero.equals(zero2)); assertEquals(zero.hashCode(), zero2.hashCode()); BigReal one = new BigReal(1.0); assertFalse((one.equals(zero) || zero.equals(one))); assertTrue(one.equals(BigReal.ONE)); } public void testSerial() { BigReal[] Reals = { new BigReal(3.0), BigReal.ONE, BigReal.ZERO, new BigReal(17), new BigReal(Math.PI), new BigReal(-2.5) }; for (BigReal Real : Reals) { assertEquals(Real, TestUtils.serializeAndRecover(Real)); } } } Other Commons Math examples (source code examples)Here is a short list of links related to this Commons Math BigRealTest.java source code file: |
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