| /* |
| * 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.iotdb.tsfile.file.metadata.statistics; |
| |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| |
| public class DoubleStatisticsTest { |
| |
| private static final double maxError = 0.0001d; |
| |
| @Test |
| public void testUpdate() { |
| Statistics<Double> doubleStats = new DoubleStatistics(); |
| doubleStats.updateStats(1.34d); |
| assertFalse(doubleStats.isEmpty()); |
| doubleStats.updateStats(2.32d); |
| assertFalse(doubleStats.isEmpty()); |
| assertEquals(2.32d, doubleStats.getMaxValue(), maxError); |
| assertEquals(1.34d, doubleStats.getMinValue(), maxError); |
| assertEquals(2.32d + 1.34d, doubleStats.getSumDoubleValue(), maxError); |
| assertEquals(1.34d, doubleStats.getFirstValue(), maxError); |
| assertEquals(2.32d, doubleStats.getLastValue(), maxError); |
| } |
| |
| @Test |
| public void testMerge() { |
| Statistics<Double> doubleStats1 = new DoubleStatistics(); |
| doubleStats1.setStartTime(0); |
| doubleStats1.setEndTime(2); |
| Statistics<Double> doubleStats2 = new DoubleStatistics(); |
| doubleStats2.setStartTime(3); |
| doubleStats2.setEndTime(5); |
| |
| doubleStats1.updateStats(1.34d); |
| doubleStats1.updateStats(100.13453d); |
| |
| doubleStats2.updateStats(200.435d); |
| |
| Statistics<Double> doubleStats3 = new DoubleStatistics(); |
| doubleStats3.mergeStatistics(doubleStats1); |
| assertFalse(doubleStats3.isEmpty()); |
| assertEquals(100.13453d, doubleStats3.getMaxValue(), maxError); |
| assertEquals(1.34d, doubleStats3.getMinValue(), maxError); |
| assertEquals(100.13453d + 1.34d, doubleStats3.getSumDoubleValue(), maxError); |
| assertEquals(1.34d, doubleStats3.getFirstValue(), maxError); |
| assertEquals(100.13453d, doubleStats3.getLastValue(), maxError); |
| |
| doubleStats3.mergeStatistics(doubleStats2); |
| assertEquals(200.435d, doubleStats3.getMaxValue(), maxError); |
| assertEquals(1.34d, doubleStats3.getMinValue(), maxError); |
| assertEquals(100.13453d + 1.34d + 200.435d, doubleStats3.getSumDoubleValue(), maxError); |
| assertEquals(1.34d, doubleStats3.getFirstValue(), maxError); |
| assertEquals(200.435d, doubleStats3.getLastValue(), maxError); |
| |
| // Unseq merge |
| Statistics<Double> doubleStats4 = new DoubleStatistics(); |
| doubleStats4.setStartTime(0); |
| doubleStats4.setEndTime(5); |
| Statistics<Double> doubleStats5 = new DoubleStatistics(); |
| doubleStats5.setStartTime(1); |
| doubleStats5.setEndTime(4); |
| |
| doubleStats4.updateStats(122.34d); |
| doubleStats4.updateStats(125.34d); |
| doubleStats5.updateStats(111.1d); |
| |
| doubleStats3.mergeStatistics(doubleStats4); |
| assertEquals(122.34d, doubleStats3.getFirstValue(), maxError); |
| assertEquals(125.34d, doubleStats3.getLastValue(), maxError); |
| |
| doubleStats3.mergeStatistics(doubleStats5); |
| assertEquals(122.34d, doubleStats3.getFirstValue(), maxError); |
| assertEquals(125.34d, doubleStats3.getLastValue(), maxError); |
| } |
| } |