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Viewing changes to src/test/org/apache/commons/math/analysis/BisectionSolverTest.java

  • Committer: Bazaar Package Importer
  • Author(s): Damien Raude-Morvan
  • Date: 2009-08-22 01:13:25 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20090822011325-hi4peq1ua5weguwn
Tags: 2.0-1
* New upstream release.
* Set Maintainer field to Debian Java Team
* Add myself as Uploaders
* Switch to Quilt patch system:
  - Refresh all patchs
  - Remove B-D on dpatch, Add B-D on quilt
  - Include patchsys-quilt.mk in debian/rules
* Bump Standards-Version to 3.8.3:
  - Add a README.source to describe patch system
* Maven POMs:
  - Add a Build-Depends-Indep dependency on maven-repo-helper
  - Use mh_installpom and mh_installjar to install the POM and the jar to the
    Maven repository
* Use default-jdk/jre:
  - Depends on java5-runtime-headless
  - Build-Depends on default-jdk
  - Use /usr/lib/jvm/default-java as JAVA_HOME
* Move api documentation to /usr/share/doc/libcommons-math-java/api
* Build-Depends on junit4 instead of junit

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src/test/org/apache/commons/math/analysis/BisectionSolverTest.java
1
 
/*
2
 
 * Licensed to the Apache Software Foundation (ASF) under one or more
3
 
 * contributor license agreements.  See the NOTICE file distributed with
4
 
 * this work for additional information regarding copyright ownership.
5
 
 * The ASF licenses this file to You under the Apache License, Version 2.0
6
 
 * (the "License"); you may not use this file except in compliance with
7
 
 * the License.  You may obtain a copy of the License at
8
 
 *
9
 
 *      http://www.apache.org/licenses/LICENSE-2.0
10
 
 *
11
 
 * Unless required by applicable law or agreed to in writing, software
12
 
 * distributed under the License is distributed on an "AS IS" BASIS,
13
 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14
 
 * See the License for the specific language governing permissions and
15
 
 * limitations under the License.
16
 
 */
17
 
package org.apache.commons.math.analysis;
18
 
 
19
 
import org.apache.commons.math.MathException;
20
 
import org.apache.commons.math.TestUtils;
21
 
 
22
 
import junit.framework.TestCase;
23
 
 
24
 
/**
25
 
 * @version $Revision: 480442 $ $Date: 2006-11-29 00:21:22 -0700 (Wed, 29 Nov 2006) $
26
 
 */
27
 
public final class BisectionSolverTest extends TestCase {
28
 
    /**
29
 
     *
30
 
     */
31
 
    public void testSinZero() throws MathException {
32
 
        UnivariateRealFunction f = new SinFunction();
33
 
        double result;
34
 
        
35
 
        UnivariateRealSolver solver = new BisectionSolver(f);
36
 
        result = solver.solve(3, 4);
37
 
        assertEquals(result, Math.PI, solver.getAbsoluteAccuracy());
38
 
 
39
 
        result = solver.solve(1, 4);
40
 
        assertEquals(result, Math.PI, solver.getAbsoluteAccuracy());
41
 
    }
42
 
 
43
 
    /**
44
 
     *
45
 
     */
46
 
    public void testQuinticZero() throws MathException {
47
 
        UnivariateRealFunction f = new QuinticFunction();
48
 
        double result;
49
 
 
50
 
        UnivariateRealSolver solver = new BisectionSolver(f);
51
 
        result = solver.solve(-0.2, 0.2);
52
 
        assertEquals(result, 0, solver.getAbsoluteAccuracy());
53
 
 
54
 
        result = solver.solve(-0.1, 0.3);
55
 
        assertEquals(result, 0, solver.getAbsoluteAccuracy());
56
 
 
57
 
        result = solver.solve(-0.3, 0.45);
58
 
        assertEquals(result, 0, solver.getAbsoluteAccuracy());
59
 
 
60
 
        result = solver.solve(0.3, 0.7);
61
 
        assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
62
 
 
63
 
        result = solver.solve(0.2, 0.6);
64
 
        assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
65
 
 
66
 
        result = solver.solve(0.05, 0.95);
67
 
        assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
68
 
 
69
 
        result = solver.solve(0.85, 1.25);
70
 
        assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
71
 
 
72
 
        result = solver.solve(0.8, 1.2);
73
 
        assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
74
 
 
75
 
        result = solver.solve(0.85, 1.75);
76
 
        assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
77
 
 
78
 
        result = solver.solve(0.55, 1.45);
79
 
        assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
80
 
 
81
 
        result = solver.solve(0.85, 5);
82
 
        assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
83
 
        
84
 
        assertEquals(result, solver.getResult(), 0);
85
 
        assertTrue(solver.getIterationCount() > 0);
86
 
    }
87
 
    
88
 
    /**
89
 
     * 
90
 
     */
91
 
    public void testSetFunctionValueAccuracy(){
92
 
        double expected = 1.0e-2;    
93
 
        UnivariateRealFunction f = new QuinticFunction();
94
 
        UnivariateRealSolver solver = new BisectionSolver(f);
95
 
        solver.setFunctionValueAccuracy(expected);
96
 
        assertEquals(expected, solver.getFunctionValueAccuracy(), 1.0e-2);
97
 
    }        
98
 
    
99
 
    /**
100
 
     * 
101
 
     */
102
 
    public void testResetFunctionValueAccuracy(){
103
 
        double newValue = 1.0e-2;    
104
 
        UnivariateRealFunction f = new QuinticFunction();
105
 
        UnivariateRealSolver solver = new BisectionSolver(f);
106
 
        double oldValue = solver.getFunctionValueAccuracy();
107
 
        solver.setFunctionValueAccuracy(newValue);
108
 
        solver.resetFunctionValueAccuracy();
109
 
        assertEquals(oldValue, solver.getFunctionValueAccuracy(), 1.0e-2);
110
 
    }        
111
 
    
112
 
    /**
113
 
     * 
114
 
     */
115
 
    public void testSetAbsoluteAccuracy(){
116
 
        double expected = 1.0e-2; 
117
 
        UnivariateRealFunction f = new QuinticFunction();
118
 
        UnivariateRealSolver solver = new BisectionSolver(f);
119
 
        solver.setAbsoluteAccuracy(expected);
120
 
        assertEquals(expected, solver.getAbsoluteAccuracy(), 1.0e-2); 
121
 
    }        
122
 
    
123
 
    /**
124
 
     * 
125
 
     */
126
 
    public void testResetAbsoluteAccuracy(){
127
 
        double newValue = 1.0e-2;       
128
 
        UnivariateRealFunction f = new QuinticFunction();
129
 
        UnivariateRealSolver solver = new BisectionSolver(f);
130
 
        double oldValue = solver.getAbsoluteAccuracy();
131
 
        solver.setAbsoluteAccuracy(newValue);
132
 
        solver.resetAbsoluteAccuracy();
133
 
        assertEquals(oldValue, solver.getAbsoluteAccuracy(), 1.0e-2);
134
 
    }        
135
 
    
136
 
    /**
137
 
     * 
138
 
     */
139
 
    public void testSetMaximalIterationCount(){
140
 
        int expected = 100;
141
 
        
142
 
        UnivariateRealFunction f = new QuinticFunction();
143
 
        UnivariateRealSolver solver = new BisectionSolver(f);
144
 
        solver.setMaximalIterationCount(expected);
145
 
        assertEquals(expected, solver.getMaximalIterationCount());
146
 
    }        
147
 
    
148
 
    /**
149
 
     * 
150
 
     */
151
 
    public void testResetMaximalIterationCount(){
152
 
        int newValue = 10000;
153
 
        
154
 
        UnivariateRealFunction f = new QuinticFunction();
155
 
        UnivariateRealSolver solver = new BisectionSolver(f);
156
 
        int oldValue = solver.getMaximalIterationCount();
157
 
        solver.setMaximalIterationCount(newValue);
158
 
        solver.resetMaximalIterationCount();
159
 
        assertEquals(oldValue, solver.getMaximalIterationCount());
160
 
    }        
161
 
    
162
 
    /**
163
 
     * 
164
 
     */
165
 
    public void testSetRelativeAccuracy(){
166
 
        double expected = 1.0e-2;
167
 
        
168
 
        UnivariateRealFunction f = new QuinticFunction();
169
 
        UnivariateRealSolver solver = new BisectionSolver(f);
170
 
        solver.setRelativeAccuracy(expected);
171
 
        assertEquals(expected, solver.getRelativeAccuracy(), 1.0e-2);
172
 
    }        
173
 
    
174
 
    /**
175
 
     * 
176
 
     */
177
 
    public void testResetRelativeAccuracy(){
178
 
        double newValue = 1.0e-2;        
179
 
        UnivariateRealFunction f = new QuinticFunction();
180
 
        UnivariateRealSolver solver = new BisectionSolver(f);
181
 
        double oldValue = solver.getRelativeAccuracy();
182
 
        solver.setRelativeAccuracy(newValue);
183
 
        solver.resetRelativeAccuracy();
184
 
        assertEquals(oldValue, solver.getRelativeAccuracy(), 1.0e-2);
185
 
    }        
186
 
    
187
 
    /**
188
 
     * Test Serialization and Recovery
189
 
     */
190
 
   public void testSerialization() throws MathException {
191
 
       UnivariateRealFunction f = (UnivariateRealFunction)TestUtils.serializeAndRecover(new QuinticFunction());
192
 
       double result;
193
 
       
194
 
       BisectionSolver solver = new BisectionSolver(f);
195
 
       UnivariateRealSolver solver2 = (UnivariateRealSolver)TestUtils.serializeAndRecover(solver);
196
 
       
197
 
       result = solver.solve(-0.2, 0.2);
198
 
       assertEquals(result, 0, solver.getAbsoluteAccuracy());
199
 
       assertEquals(solver2.solve(-0.2, 0.2), result, solver2.getAbsoluteAccuracy());
200
 
       
201
 
       result = solver.solve(-0.1, 0.3);
202
 
       assertEquals(result, 0, solver.getAbsoluteAccuracy());
203
 
       assertEquals(solver2.solve(-0.1, 0.3), result, solver2.getAbsoluteAccuracy());
204
 
       
205
 
       result = solver.solve(-0.3, 0.45);
206
 
       assertEquals(result, 0, solver.getAbsoluteAccuracy());
207
 
       assertEquals(solver2.solve(-0.3, 0.45), result, solver2.getAbsoluteAccuracy());
208
 
       
209
 
       result = solver.solve(0.3, 0.7);
210
 
       assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
211
 
       assertEquals(solver2.solve(0.3, 0.7), result, solver2.getAbsoluteAccuracy());
212
 
       
213
 
       result = solver.solve(0.2, 0.6);
214
 
       assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
215
 
       assertEquals(solver2.solve(0.2, 0.6), result, solver2.getAbsoluteAccuracy());
216
 
       
217
 
       result = solver.solve(0.05, 0.95);
218
 
       assertEquals(result, 0.5, solver.getAbsoluteAccuracy());
219
 
       assertEquals(solver2.solve(0.05, 0.95), result, solver2.getAbsoluteAccuracy());
220
 
       
221
 
       result = solver.solve(0.85, 1.25);
222
 
       assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
223
 
       assertEquals(solver2.solve(0.85, 1.25), result, solver2.getAbsoluteAccuracy());
224
 
       
225
 
       result = solver.solve(0.8, 1.2);
226
 
       assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
227
 
       assertEquals(solver2.solve(0.8, 1.2), result, solver2.getAbsoluteAccuracy());
228
 
       
229
 
       result = solver.solve(0.85, 1.75);
230
 
       assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
231
 
       assertEquals(solver2.solve(0.85, 1.75), result, solver2.getAbsoluteAccuracy());
232
 
       
233
 
       result = solver.solve(0.55, 1.45);
234
 
       assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
235
 
       assertEquals(solver2.solve(0.55, 1.45), result, solver2.getAbsoluteAccuracy());
236
 
       
237
 
       result = solver.solve(0.85, 5);
238
 
       assertEquals(result, 1.0, solver.getAbsoluteAccuracy());
239
 
       assertEquals(solver2.solve(0.85, 5), result, solver2.getAbsoluteAccuracy());
240
 
       
241
 
       /* Test Reset */
242
 
       double newValue = 1.0e-2;
243
 
       f = (UnivariateRealFunction)TestUtils.serializeAndRecover(new QuinticFunction());
244
 
       solver = new BisectionSolver(f);
245
 
       
246
 
       double oldValue = solver.getRelativeAccuracy();
247
 
       solver.setRelativeAccuracy(newValue);
248
 
       solver.resetRelativeAccuracy();
249
 
       assertEquals(oldValue, solver.getRelativeAccuracy(), 1.0e-2);
250
 
       
251
 
       solver2 = (UnivariateRealSolver)TestUtils.serializeAndRecover(solver); 
252
 
       
253
 
       assertEquals(oldValue, solver2.getRelativeAccuracy(), 1.0e-2);
254
 
       
255
 
       solver2.setRelativeAccuracy(newValue);
256
 
       solver2.resetRelativeAccuracy();
257
 
       
258
 
       assertEquals(oldValue, solver2.getRelativeAccuracy(), 1.0e-2);
259
 
       
260
 
   }
261
 
   
262
 
}