| /** |
| * 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 com.datatorrent.lib.math; |
| |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| /** |
| * Functional tests for {@link com.datatorrent.lib.math.RunningAverage} |
| */ |
| public class RunningAverageTest |
| { |
| |
| @Test |
| public void testDoesNotOverflow() |
| { |
| RunningAverage instance = new RunningAverage(); |
| instance.input.process(Double.MAX_VALUE); |
| assertEquals("first average", Double.MAX_VALUE, instance.average, 0); |
| |
| instance.input.process(Double.MAX_VALUE); |
| |
| assertEquals("second average", Double.MAX_VALUE, instance.average, 0); |
| } |
| |
| @Test |
| public void testLogicForSmallValues() |
| { |
| logger.debug("small values"); |
| RunningAverage instance = new RunningAverage(); |
| instance.input.process(1.0); |
| |
| assertEquals("first average", 1.0, instance.average, 0.00001); |
| assertEquals("first count", 1, instance.count); |
| |
| instance.input.process(2.0); |
| |
| assertEquals("second average", 1.5, instance.average, 0.00001); |
| assertEquals("second count", 2, instance.count); |
| } |
| |
| @Test |
| public void testLogicForLargeValues() |
| { |
| logger.debug("large values"); |
| RunningAverage instance = new RunningAverage(); |
| instance.input.process(Long.MAX_VALUE); |
| |
| assertEquals("first average", Long.MAX_VALUE, (long)instance.average); |
| |
| instance.input.process(Long.MAX_VALUE); |
| assertEquals("second average", Long.MAX_VALUE, (long)instance.average); |
| } |
| |
| private static final Logger logger = LoggerFactory |
| .getLogger(RunningAverageTest.class); |
| } |