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 }