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.stat.descriptive;
018
019
020 import junit.framework.Test;
021 import junit.framework.TestCase;
022 import junit.framework.TestSuite;
023
024 import org.apache.commons.math.TestUtils;
025 /**
026 * Test cases for the {@link StatisticalSummaryValues} class.
027 *
028 * @version $Revision: 762087 $ $Date: 2009-04-05 10:20:18 -0400 (Sun, 05 Apr 2009) $
029 */
030
031 public final class StatisticalSummaryValuesTest extends TestCase {
032
033
034 public StatisticalSummaryValuesTest(String name) {
035 super(name);
036 }
037
038 public static Test suite() {
039 TestSuite suite = new TestSuite(StatisticalSummaryValuesTest.class);
040 suite.setName("StatisticalSummaryValues Tests");
041 return suite;
042 }
043
044 public void testSerialization() {
045 StatisticalSummaryValues u = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
046 TestUtils.checkSerializedEquality(u);
047 StatisticalSummaryValues t = (StatisticalSummaryValues) TestUtils.serializeAndRecover(u);
048 verifyEquality(u, t);
049 }
050
051 public void testEqualsAndHashCode() {
052 StatisticalSummaryValues u = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
053 StatisticalSummaryValues t = null;
054 assertTrue("reflexive", u.equals(u));
055 assertFalse("non-null compared to null", u.equals(t));
056 assertFalse("wrong type", u.equals(Double.valueOf(0)));
057 t = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
058 assertTrue("instances with same data should be equal", t.equals(u));
059 assertEquals("hash code", u.hashCode(), t.hashCode());
060
061 u = new StatisticalSummaryValues(Double.NaN, 2, 3, 4, 5, 6);
062 t = new StatisticalSummaryValues(1, Double.NaN, 3, 4, 5, 6);
063 assertFalse("instances based on different data should be different",
064 (u.equals(t) ||t.equals(u)));
065 }
066
067 private void verifyEquality(StatisticalSummaryValues s, StatisticalSummaryValues u) {
068 assertEquals("N",s.getN(),u.getN());
069 TestUtils.assertEquals("sum",s.getSum(),u.getSum(), 0);
070 TestUtils.assertEquals("var",s.getVariance(),u.getVariance(), 0);
071 TestUtils.assertEquals("std",s.getStandardDeviation(),u.getStandardDeviation(), 0);
072 TestUtils.assertEquals("mean",s.getMean(),u.getMean(), 0);
073 TestUtils.assertEquals("min",s.getMin(),u.getMin(), 0);
074 TestUtils.assertEquals("max",s.getMax(),u.getMax(), 0);
075 }
076 }