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.math4.legacy.stat.descriptive.moment;
18
19 import org.apache.commons.math4.legacy.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
20 import org.apache.commons.math4.legacy.stat.descriptive.UnivariateStatistic;
21
22 /**
23 * Test cases for the {@link SecondMoment} class.
24 */
25 public class SecondMomentTest extends StorelessUnivariateStatisticAbstractTest {
26
27 /** descriptive statistic. */
28 protected SecondMoment stat;
29
30 /**
31 * @see org.apache.commons.math4.legacy.stat.descriptive.UnivariateStatisticAbstractTest#getUnivariateStatistic()
32 */
33 @Override
34 public UnivariateStatistic getUnivariateStatistic() {
35 return new SecondMoment();
36 }
37
38 /**
39 * @see org.apache.commons.math4.legacy.stat.descriptive.UnivariateStatisticAbstractTest#expectedValue()
40 */
41 @Override
42 public double expectedValue() {
43 return this.secondMoment;
44 }
45 }