| /* |
| * 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.math4.stat.descriptive.rank; |
| |
| import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatisticAbstractTest; |
| import org.apache.commons.math4.stat.descriptive.UnivariateStatistic; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Test cases for the {@link UnivariateStatistic} class. |
| */ |
| public class MinTest extends StorelessUnivariateStatisticAbstractTest{ |
| |
| protected Min stat; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public UnivariateStatistic getUnivariateStatistic() { |
| return new Min(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public double expectedValue() { |
| return this.min; |
| } |
| |
| @Test |
| public void testSpecialValues() { |
| double[] testArray = {0d, Double.NaN, Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY}; |
| Min min = new Min(); |
| Assert.assertTrue(Double.isNaN(min.getResult())); |
| min.increment(testArray[0]); |
| Assert.assertEquals(0d, min.getResult(), 0); |
| min.increment(testArray[1]); |
| Assert.assertEquals(0d, min.getResult(), 0); |
| min.increment(testArray[2]); |
| Assert.assertEquals(0d, min.getResult(), 0); |
| min.increment(testArray[3]); |
| Assert.assertEquals(Double.NEGATIVE_INFINITY, min.getResult(), 0); |
| Assert.assertEquals(Double.NEGATIVE_INFINITY, min.evaluate(testArray), 0); |
| } |
| |
| @Test |
| public void testNaNs() { |
| Min min = new Min(); |
| double nan = Double.NaN; |
| Assert.assertEquals(2d, min.evaluate(new double[]{nan, 2d, 3d}), 0); |
| Assert.assertEquals(1d, min.evaluate(new double[]{1d, nan, 3d}), 0); |
| Assert.assertEquals(1d, min.evaluate(new double[]{1d, 2d, nan}), 0); |
| Assert.assertTrue(Double.isNaN(min.evaluate(new double[]{nan, nan, nan}))); |
| } |
| |
| } |