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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.apache.commons.math.stat.descriptive.rank;
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import junit.framework.Test;
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import junit.framework.TestSuite;
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import org.apache.commons.math.stat.descriptive.StorelessUnivariateStatisticAbstractTest;
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import org.apache.commons.math.stat.descriptive.UnivariateStatistic;
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* Test cases for the {@link UnivariateStatistic} class.
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* @version $Revision: 480442 $ $Date: 2006-11-29 00:21:22 -0700 (Wed, 29 Nov 2006) $
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public class MinTest extends StorelessUnivariateStatisticAbstractTest{
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public MinTest(String name) {
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public static Test suite() {
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TestSuite suite = new TestSuite(MinTest.class);
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suite.setName("Min Tests");
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* @see org.apache.commons.math.stat.descriptive.UnivariateStatisticAbstractTest#getUnivariateStatistic()
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public UnivariateStatistic getUnivariateStatistic() {
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* @see org.apache.commons.math.stat.descriptive.UnivariateStatisticAbstractTest#expectedValue()
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public double expectedValue() {
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public void testSpecialValues() {
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double[] testArray = {0d, Double.NaN, Double.POSITIVE_INFINITY,
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Double.NEGATIVE_INFINITY};
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assertTrue(Double.isNaN(min.getResult()));
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min.increment(testArray[0]);
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assertEquals(0d, min.getResult(), 0);
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min.increment(testArray[1]);
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assertEquals(0d, min.getResult(), 0);
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min.increment(testArray[2]);
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assertEquals(0d, min.getResult(), 0);
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min.increment(testArray[3]);
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assertEquals(Double.NEGATIVE_INFINITY, min.getResult(), 0);
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assertEquals(Double.NEGATIVE_INFINITY, min.evaluate(testArray), 0);
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public void testNaNs() {
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double nan = Double.NaN;
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assertEquals(2d, min.evaluate(new double[]{nan, 2d, 3d}), 0);
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assertEquals(1d, min.evaluate(new double[]{1d, nan, 3d}), 0);
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assertEquals(1d, min.evaluate(new double[]{1d, 2d, nan}), 0);
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assertTrue(Double.isNaN(min.evaluate(new double[]{nan, nan, nan})));