001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.math.util; 018 019 import org.apache.commons.math.MathException; 020 021 import junit.framework.TestCase; 022 023 /** 024 * @version $Revision: 778522 $ $Date: 2009-05-25 18:24:50 -0400 (Mon, 25 May 2009) $ 025 */ 026 public class ContinuedFractionTest extends TestCase { 027 /** 028 * Constructor for ContinuedFractionTest. 029 * @param name 030 */ 031 public ContinuedFractionTest(String name) { 032 super(name); 033 } 034 035 public void testGoldenRatio(){ 036 ContinuedFraction cf = new ContinuedFraction() { 037 038 @Override 039 public double getA(int n, double x) { 040 return 1.0; 041 } 042 043 @Override 044 public double getB(int n, double x) { 045 return 1.0; 046 } 047 }; 048 049 try { 050 double gr = cf.evaluate(0.0, 10e-9); 051 assertEquals(1.61803399, gr, 10e-9); 052 } catch (MathException e) { 053 fail(e.getMessage()); 054 } 055 } 056 }