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Java example source code file (StatisticalSummaryValuesTest.java)

This example Java source code file (StatisticalSummaryValuesTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

locale, statisticalsummaryvalues, statisticalsummaryvalues:\n, statisticalsummaryvalues:\n, statisticalsummaryvaluestest, test, util

The StatisticalSummaryValuesTest.java Java example source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.math3.stat.descriptive;


import java.util.Locale;


import org.apache.commons.math3.TestUtils;
import org.junit.Assert;
import org.junit.Test;
/**
 * Test cases for the {@link StatisticalSummaryValues} class.
 *
 */

public final class StatisticalSummaryValuesTest {

    @Test
    public void testSerialization() {
        StatisticalSummaryValues u = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
        TestUtils.checkSerializedEquality(u);
        StatisticalSummaryValues t = (StatisticalSummaryValues) TestUtils.serializeAndRecover(u);
        verifyEquality(u, t);
    }

    @Test
    public void testEqualsAndHashCode() {
        StatisticalSummaryValues u  = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
        StatisticalSummaryValues t = null;
        Assert.assertTrue("reflexive", u.equals(u));
        Assert.assertFalse("non-null compared to null", u.equals(t));
        Assert.assertFalse("wrong type", u.equals(Double.valueOf(0)));
        t = new StatisticalSummaryValues(1, 2, 3, 4, 5, 6);
        Assert.assertTrue("instances with same data should be equal", t.equals(u));
        Assert.assertEquals("hash code", u.hashCode(), t.hashCode());

        u = new StatisticalSummaryValues(Double.NaN, 2, 3, 4, 5, 6);
        t = new StatisticalSummaryValues(1, Double.NaN, 3, 4, 5, 6);
        Assert.assertFalse("instances based on different data should be different",
                (u.equals(t) ||t.equals(u)));
    }

    private void verifyEquality(StatisticalSummaryValues s, StatisticalSummaryValues u) {
        Assert.assertEquals("N",s.getN(),u.getN());
        TestUtils.assertEquals("sum",s.getSum(),u.getSum(), 0);
        TestUtils.assertEquals("var",s.getVariance(),u.getVariance(), 0);
        TestUtils.assertEquals("std",s.getStandardDeviation(),u.getStandardDeviation(), 0);
        TestUtils.assertEquals("mean",s.getMean(),u.getMean(), 0);
        TestUtils.assertEquals("min",s.getMin(),u.getMin(), 0);
        TestUtils.assertEquals("max",s.getMax(),u.getMax(), 0);
    }

    @Test
    public void testToString() {
        StatisticalSummaryValues u  = new StatisticalSummaryValues(4.5, 16, 10, 5, 4, 45);
        Locale d = Locale.getDefault();
        Locale.setDefault(Locale.US);
        Assert.assertEquals("StatisticalSummaryValues:\n" +
                     "n: 10\n" +
                     "min: 4.0\n" +
                     "max: 5.0\n" +
                     "mean: 4.5\n" +
                     "std dev: 4.0\n" +
                     "variance: 16.0\n" +
                     "sum: 45.0\n",  u.toString());
        Locale.setDefault(d);
    }
}

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