001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.metrics.impl;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021
022import java.util.concurrent.TimeUnit;
023import org.apache.hadoop.hbase.metrics.Timer;
024import org.apache.hadoop.hbase.testclassification.SmallTests;
025import org.junit.jupiter.api.BeforeEach;
026import org.junit.jupiter.api.Tag;
027import org.junit.jupiter.api.Test;
028
029/**
030 * Test class for {@link TimerImpl}
031 */
032@Tag(SmallTests.TAG)
033public class TestTimerImpl {
034
035  private Timer timer;
036
037  @BeforeEach
038  public void setup() {
039    this.timer = new TimerImpl();
040  }
041
042  @Test
043  public void testUpdate() {
044    timer.update(40, TimeUnit.MILLISECONDS);
045    timer.update(41, TimeUnit.MILLISECONDS);
046    timer.update(42, TimeUnit.MILLISECONDS);
047    assertEquals(3, timer.getHistogram().getCount());
048    assertEquals(3, timer.getMeter().getCount());
049    assertEquals(TimeUnit.MILLISECONDS.toMicros(41), timer.getHistogram().snapshot().getMedian());
050  }
051}