| /* |
| * 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.summary; |
| |
| import org.apache.commons.math4.stat.descriptive.StorelessUnivariateStatistic; |
| 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 SumLogTest extends StorelessUnivariateStatisticAbstractTest{ |
| |
| protected SumOfLogs stat; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public UnivariateStatistic getUnivariateStatistic() { |
| return new SumOfLogs(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public double expectedValue() { |
| return this.sumLog; |
| } |
| |
| @Test |
| public void testSpecialValues() { |
| SumOfLogs sum = new SumOfLogs(); |
| // empty |
| Assert.assertEquals(0, sum.getResult(), 0); |
| |
| // finite data |
| sum.increment(1d); |
| Assert.assertFalse(Double.isNaN(sum.getResult())); |
| |
| // add negative infinity |
| sum.increment(0d); |
| Assert.assertEquals(Double.NEGATIVE_INFINITY, sum.getResult(), 0); |
| |
| // add positive infinity -- should make NaN |
| sum.increment(Double.POSITIVE_INFINITY); |
| Assert.assertTrue(Double.isNaN(sum.getResult())); |
| |
| // clear |
| sum.clear(); |
| Assert.assertEquals(0, sum.getResult(), 0); |
| |
| // positive infinity by itself |
| sum.increment(Double.POSITIVE_INFINITY); |
| Assert.assertEquals(Double.POSITIVE_INFINITY, sum.getResult(), 0); |
| |
| // negative value -- should make NaN |
| sum.increment(-2d); |
| Assert.assertTrue(Double.isNaN(sum.getResult())); |
| } |
| |
| @Override |
| protected void checkClearValue(StorelessUnivariateStatistic statistic) { |
| Assert.assertEquals(0, statistic.getResult(), 0); |
| } |
| |
| } |