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.stat.descriptive;
18  
19  
20  import junit.framework.Test;
21  import junit.framework.TestCase;
22  import junit.framework.TestSuite;
23  
24  import org.apache.commons.math.TestUtils;
25  /**
26   * Test cases for the {@link StatisticalSummaryValues} class.
27   *
28   * @version $Revision: 762087 $ $Date: 2009-04-05 10:20:18 -0400 (Sun, 05 Apr 2009) $
29   */
30  
31  public final class StatisticalSummaryValuesTest extends TestCase {
32      
33      
34      public StatisticalSummaryValuesTest(String name) {
35          super(name);
36      }
37      
38      public static Test suite() {
39          TestSuite suite = new TestSuite(StatisticalSummaryValuesTest.class);
40          suite.setName("StatisticalSummaryValues Tests");
41          return suite;
42      }
43        
44      public void testSerialization() {
45          StatisticalSummaryValues u = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
46          TestUtils.checkSerializedEquality(u); 
47          StatisticalSummaryValues t = (StatisticalSummaryValues) TestUtils.serializeAndRecover(u);
48          verifyEquality(u, t);
49      }
50      
51      public void testEqualsAndHashCode() {
52          StatisticalSummaryValues u  = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
53          StatisticalSummaryValues t = null;
54          assertTrue("reflexive", u.equals(u));
55          assertFalse("non-null compared to null", u.equals(t));
56          assertFalse("wrong type", u.equals(Double.valueOf(0)));
57          t = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
58          assertTrue("instances with same data should be equal", t.equals(u));
59          assertEquals("hash code", u.hashCode(), t.hashCode());
60          
61          u = new StatisticalSummaryValues(Double.NaN, 2, 3, 4, 5, 6);
62          t = new StatisticalSummaryValues(1, Double.NaN, 3, 4, 5, 6);
63          assertFalse("instances based on different data should be different", 
64                  (u.equals(t) ||t.equals(u)));
65      }
66      
67      private void verifyEquality(StatisticalSummaryValues s, StatisticalSummaryValues u) {
68          assertEquals("N",s.getN(),u.getN());
69          TestUtils.assertEquals("sum",s.getSum(),u.getSum(), 0);
70          TestUtils.assertEquals("var",s.getVariance(),u.getVariance(), 0);
71          TestUtils.assertEquals("std",s.getStandardDeviation(),u.getStandardDeviation(), 0);
72          TestUtils.assertEquals("mean",s.getMean(),u.getMean(), 0);
73          TestUtils.assertEquals("min",s.getMin(),u.getMin(), 0);
74          TestUtils.assertEquals("max",s.getMax(),u.getMax(), 0);   
75      }
76  }