cvs commit: jakarta-commons-sandbox/math/src/test/org/apache/commons/math/analysis BisectionSolverTest.java

[md...@apache.org]

mdiggory    2003/07/05 11:05:32

  Added:       math/src/test/org/apache/commons/math/analysis
                        BisectionSolverTest.java
  Log:
  PR: http://nagoya.apache.org/bugzilla/show_bug.cgi?id=21313
  Submitted by:	brent@worden.org
  
  Revision  Changes    Path
  1.1                  jakarta-commons-sandbox/math/src/test/org/apache/commons/math/analysis/BisectionSolverTest.java
  
  Index: BisectionSolverTest.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.commons.math.analysis;
  
  import org.apache.commons.math.MathException;
  
  import junit.framework.TestCase;
  
  /**
   *
   */
  public final class BisectionSolverTest extends TestCase {
      /**
       *
       */
      public BisectionSolverTest(String name) {
          super(name);
      }
  
      /**
       *
       */
      public void testSinZero() throws MathException {
          UnivariateRealFunction f = new SinFunction();
          double result;
          
          UnivariateRealSolver solver = new BisectionSolver(f);
          result = solver.solve(3, 4);
          assertEquals(result, Math.PI, solver.getAbsoluteAccuracy());
  
          result = solver.solve(1, 4);
          assertEquals(result, Math.PI, solver.getAbsoluteAccuracy());
      }
  
      /**
       *
       */
      public void testQuinticZero() throws MathException {
          UnivariateRealFunction f = new QuinticFunction();
          double result;
  
          UnivariateRealSolver solver = new BisectionSolver(f);
          result = solver.solve(-0.2, 0.2);
          assertEquals(result, 0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(-0.1, 0.3);
          assertEquals(result, 0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(-0.3, 0.45);
          assertEquals(result, 0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.3, 0.7);
          assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.2, 0.6);
          assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.05, 0.95);
          assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.85, 1.25);
          assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.8, 1.2);
          assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.85, 1.75);
          assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.55, 1.45);
          assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
  
          result = solver.solve(0.85, 5);
          assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
      }
  }
  
  
  

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