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Java example source code file (Decimal64Test.java)

This example Java source code file (Decimal64Test.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

decimal64, decimal64test, extendedfieldelementabstracttest, minus_x, minus_y, minus_zero, override, plus_x, plus_y, plus_zero, test

The Decimal64Test.java Java example 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.math3.util;

import org.apache.commons.math3.ExtendedFieldElementAbstractTest;
import org.junit.Assert;

import org.junit.Test;

public class Decimal64Test extends ExtendedFieldElementAbstractTest<Decimal64> {
    public static final double X = 1.2345;

    public static final Decimal64 PLUS_X = new Decimal64(X);

    public static final Decimal64 MINUS_X = new Decimal64(-X);

    public static final double Y = 6.789;

    public static final Decimal64 PLUS_Y = new Decimal64(Y);

    public static final Decimal64 MINUS_Y = new Decimal64(-Y);

    public static final Decimal64 PLUS_ZERO = new Decimal64(0.0);

    public static final Decimal64 MINUS_ZERO = new Decimal64(-0.0);

    @Override
    protected Decimal64 build(final double x) {
        return new Decimal64(x);
    }

    @Test
    public void testAdd() {
        Decimal64 expected, actual;

        expected = new Decimal64(X + Y);
        actual = PLUS_X.add(PLUS_Y);
        Assert.assertEquals(expected, actual);
        actual = PLUS_Y.add(PLUS_X);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64(X + (-Y));
        actual = PLUS_X.add(MINUS_Y);
        Assert.assertEquals(expected, actual);
        actual = MINUS_Y.add(PLUS_X);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64((-X) + (-Y));
        actual = MINUS_X.add(MINUS_Y);
        Assert.assertEquals(expected, actual);
        actual = MINUS_Y.add(MINUS_X);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.POSITIVE_INFINITY;
        actual = PLUS_X.add(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.add(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.add(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.add(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.add(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NEGATIVE_INFINITY;
        actual = PLUS_X.add(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.add(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.add(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.add(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.add(MINUS_X);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NAN;
        actual = Decimal64.POSITIVE_INFINITY.add(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.add(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = PLUS_X.add(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.add(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.add(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.add(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.add(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.add(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.add(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.add(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.add(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testSubtract() {
        Decimal64 expected, actual;

        expected = new Decimal64(X - Y);
        actual = PLUS_X.subtract(PLUS_Y);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64(X - (-Y));
        actual = PLUS_X.subtract(MINUS_Y);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64((-X) - Y);
        actual = MINUS_X.subtract(PLUS_Y);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64((-X) - (-Y));
        actual = MINUS_X.subtract(MINUS_Y);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NEGATIVE_INFINITY;
        actual = PLUS_X.subtract(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.subtract(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY
                .subtract(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.POSITIVE_INFINITY;
        actual = PLUS_X.subtract(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.subtract(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY
                .subtract(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NAN;
        actual = Decimal64.POSITIVE_INFINITY
                .subtract(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY
                .subtract(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = PLUS_X.subtract(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.subtract(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.subtract(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.subtract(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.subtract(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.subtract(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.subtract(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.subtract(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.subtract(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegate() {
        Decimal64 expected, actual;

        expected = MINUS_X;
        actual = PLUS_X.negate();
        Assert.assertEquals(expected, actual);

        expected = PLUS_X;
        actual = MINUS_X.negate();
        Assert.assertEquals(expected, actual);

        expected = MINUS_ZERO;
        actual = PLUS_ZERO.negate();
        Assert.assertEquals(expected, actual);

        expected = PLUS_ZERO;
        actual = MINUS_ZERO.negate();
        Assert.assertEquals(expected, actual);

        expected = Decimal64.POSITIVE_INFINITY;
        actual = Decimal64.NEGATIVE_INFINITY.negate();
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NEGATIVE_INFINITY;
        actual = Decimal64.POSITIVE_INFINITY.negate();
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NAN;
        actual = Decimal64.NAN.negate();
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testMultiply() {
        Decimal64 expected, actual;

        expected = new Decimal64(X * Y);
        actual = PLUS_X.multiply(PLUS_Y);
        Assert.assertEquals(expected, actual);
        actual = PLUS_Y.multiply(PLUS_X);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64(X * (-Y));
        actual = PLUS_X.multiply(MINUS_Y);
        Assert.assertEquals(expected, actual);
        actual = MINUS_Y.multiply(PLUS_X);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64((-X) * (-Y));
        actual = MINUS_X.multiply(MINUS_Y);
        Assert.assertEquals(expected, actual);
        actual = MINUS_Y.multiply(MINUS_X);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.POSITIVE_INFINITY;
        actual = PLUS_X.multiply(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.multiply(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.multiply(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.multiply(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY
                .multiply(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY
                .multiply(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NEGATIVE_INFINITY;
        actual = PLUS_X.multiply(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.multiply(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.multiply(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.multiply(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY
                .multiply(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY
                .multiply(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NAN;
        actual = PLUS_X.multiply(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.multiply(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.multiply(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.multiply(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.multiply(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.multiply(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.multiply(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.multiply(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.multiply(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testDivide() {
        Decimal64 expected, actual;

        expected = new Decimal64(X / Y);
        actual = PLUS_X.divide(PLUS_Y);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64(X / (-Y));
        actual = PLUS_X.divide(MINUS_Y);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64((-X) / Y);
        actual = MINUS_X.divide(PLUS_Y);
        Assert.assertEquals(expected, actual);

        expected = new Decimal64((-X) / (-Y));
        actual = MINUS_X.divide(MINUS_Y);
        Assert.assertEquals(expected, actual);

        expected = PLUS_ZERO;
        actual = PLUS_X.divide(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.divide(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = MINUS_ZERO;
        actual = MINUS_X.divide(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = PLUS_X.divide(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.POSITIVE_INFINITY;
        actual = Decimal64.POSITIVE_INFINITY.divide(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.divide(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = PLUS_X.divide(PLUS_ZERO);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.divide(MINUS_ZERO);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NEGATIVE_INFINITY;
        actual = Decimal64.POSITIVE_INFINITY.divide(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.divide(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = PLUS_X.divide(MINUS_ZERO);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.divide(PLUS_ZERO);
        Assert.assertEquals(expected, actual);

        expected = Decimal64.NAN;
        actual = Decimal64.POSITIVE_INFINITY
                .divide(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY
                .divide(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY
                .divide(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY
                .divide(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = PLUS_X.divide(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.divide(PLUS_X);
        Assert.assertEquals(expected, actual);
        actual = MINUS_X.divide(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.divide(MINUS_X);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.POSITIVE_INFINITY.divide(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.divide(Decimal64.POSITIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NEGATIVE_INFINITY.divide(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.divide(Decimal64.NEGATIVE_INFINITY);
        Assert.assertEquals(expected, actual);
        actual = Decimal64.NAN.divide(Decimal64.NAN);
        Assert.assertEquals(expected, actual);
        actual = PLUS_ZERO.divide(PLUS_ZERO);
        Assert.assertEquals(expected, actual);
        actual = PLUS_ZERO.divide(MINUS_ZERO);
        Assert.assertEquals(expected, actual);
        actual = MINUS_ZERO.divide(PLUS_ZERO);
        Assert.assertEquals(expected, actual);
        actual = MINUS_ZERO.divide(MINUS_ZERO);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testReciprocal() {
        Decimal64 expected, actual;

        expected = new Decimal64(1.0 / X);
        actual = PLUS_X.reciprocal();
        Assert.assertEquals(expected, actual);

        expected = new Decimal64(1.0 / (-X));
        actual = MINUS_X.reciprocal();
        Assert.assertEquals(expected, actual);

        expected = PLUS_ZERO;
        actual = Decimal64.POSITIVE_INFINITY.reciprocal();
        Assert.assertEquals(expected, actual);

        expected = MINUS_ZERO;
        actual = Decimal64.NEGATIVE_INFINITY.reciprocal();
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testIsInfinite() {
        Assert.assertFalse(MINUS_X.isInfinite());
        Assert.assertFalse(PLUS_X.isInfinite());
        Assert.assertFalse(MINUS_Y.isInfinite());
        Assert.assertFalse(PLUS_Y.isInfinite());
        Assert.assertFalse(Decimal64.NAN.isInfinite());

        Assert.assertTrue(Decimal64.NEGATIVE_INFINITY.isInfinite());
        Assert.assertTrue(Decimal64.POSITIVE_INFINITY.isInfinite());
    }

    @Test
    public void testIsNaN() {
        Assert.assertFalse(MINUS_X.isNaN());
        Assert.assertFalse(PLUS_X.isNaN());
        Assert.assertFalse(MINUS_Y.isNaN());
        Assert.assertFalse(PLUS_Y.isNaN());
        Assert.assertFalse(Decimal64.NEGATIVE_INFINITY.isNaN());
        Assert.assertFalse(Decimal64.POSITIVE_INFINITY.isNaN());

        Assert.assertTrue(Decimal64.NAN.isNaN());
    }
}

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