    1   /*
    2    * Copyright 2003-2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  package org.apache.commons.math.util;
    17
    18  import org.apache.commons.math.MathException;
    19
    20  import junit.framework.TestCase;
    21
    22  /***
    23   * @version $Revision: 201916 $ $Date: 2005-06-26 15:25:41 -0700 (Sun, 26 Jun 2005) $
    24   */
    25  public class ContinuedFractionTest extends TestCase {
    26      /***
    27       * Constructor for ContinuedFractionTest.
    28       * @param name
    29       */
    30      public ContinuedFractionTest(String name) {
    31          super(name);
    32      }
    33
    34      public void testGoldenRation(){
    35          ContinuedFraction cf = new ContinuedFraction() {
    36              public double getA(int n, double x) {
    37                  return 1.0;
    38              }
    39
    40              public double getB(int n, double x) {
    41                  return 1.0;
    42              }
    43          };
    44
    45          try {
    46              double gr = cf.evaluate(0.0, 10e-9);
    47              assertEquals(1.61803399, gr, 10e-9);
    48          } catch (MathException e) {
    49              fail(e.getMessage());
    50          }
    51      }
    52  }