PolynomTest.java

/*
 * Copyright (c) 2009-2015
 * 	IT-Consulting Stephan Schloepke (http://www.schloepke.de/)
 * 	klemm software consulting Mirko Klemm (http://www.klemm-scs.com/)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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package org.jbasics.math.polynom;

import org.junit.Assert;
import org.jbasics.math.BigRational;
import org.jbasics.math.MathFunction;
import org.jbasics.testing.Java14LoggingTestCase;
import org.junit.Test;

@SuppressWarnings("nls")
public class PolynomTest extends Java14LoggingTestCase {

	@Test
	public void test() {
		MathFunction polynom = new Polynom(3, 2, 17);
		this.logger.info("The polynom is f(x) = " + polynom);

		Number input = BigRational.valueOf("7");
		Number actual = polynom.calculate(input);
		this.logger.info("Result f(" + input + ") = " + actual);
		Assert.assertEquals(BigRational.valueOf("178"), actual);

		input = BigRational.valueOf("5.5");
		actual = polynom.calculate(input);
		this.logger.info("Result f(" + input + ") = " + actual);
		Assert.assertEquals(BigRational.valueOf("475/4"), actual);

		input = BigRational.valueOf("3/4563");
		actual = polynom.calculate(input);
		this.logger.info("Result f(" + input + ") = " + actual);
		Assert.assertEquals(BigRational.valueOf("13110514/771147"), actual);
	}

	@Test
	public void testAdd() {
		Polynom lhs = new Polynom(3, 2, 4, 0, 2);
		Polynom rhs = new Polynom(14, 6, 4);
		Polynom expected, actual;

		actual = lhs.add(rhs);
		expected = new Polynom(17, 8, 8, 0, 2);
		this.logger.info("Polynom add: " + lhs + " (+) " + rhs + " (=) " + actual);
		Assert.assertEquals(expected, actual);
		Assert.assertTrue(expected.compareTo(actual) == 0);

		actual = lhs.subtract(rhs);
		expected = new Polynom(-11, -4, 0, 0, 2);
		this.logger.info("Polynom subtract: " + lhs + " (+) " + rhs + " (=) " + actual);
		Assert.assertEquals(expected, actual);
		Assert.assertTrue(expected.compareTo(actual) == 0);

		actual = lhs.multiply(rhs);
		expected = new Polynom(42, 46, 80, 32, 44, 12, 8);
		this.logger.info("Polynom multiply: " + lhs + " (+) " + rhs + " (=) " + actual);
		Assert.assertEquals(expected, actual);
		Assert.assertTrue(expected.compareTo(actual) == 0);

		this.logger.info("Polynom divide: " + lhs + " (+) " + rhs + " (=) " + lhs.divide(rhs));
	}
}