common/util/src/test/java/org/opendaylight/yangtools/util/DurationStatisticsTrackerTest.java

   1 /*
   2  * Copyright (c) 2014 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.yangtools.util;
  10
  11 import static org.junit.Assert.assertEquals;
  12 import static org.junit.Assert.assertTrue;
  13
  14 import org.junit.Test;
  15
  16 /**
  17  * Unit tests for DurationStatsTracker.
  18  *
  19  * @author Thomas Pantelis
  20  */
  21 public class DurationStatisticsTrackerTest {
  22
  23     @Test
  24     public void test() {
  25
  26         DurationStatisticsTracker tracker = DurationStatisticsTracker.createConcurrent();
  27
  28         tracker.addDuration(10000);
  29         assertEquals("getTotalDurations", 1, tracker.getTotalDurations());
  30         assertEquals("getAverageDuration", 10000.0, tracker.getAverageDuration(), 0.1);
  31         assertEquals("getLongestDuration", 10000, tracker.getLongestDuration());
  32         assertEquals("getShortestDuration", 10000, tracker.getShortestDuration());
  33
  34         tracker.addDuration(30000);
  35         assertEquals("getTotalDurations", 2, tracker.getTotalDurations());
  36         assertEquals("getAverageDuration", 20000.0, tracker.getAverageDuration(), 0.1);
  37         assertEquals("getLongestDuration", 30000, tracker.getLongestDuration());
  38         assertEquals("getShortestDuration", 10000, tracker.getShortestDuration());
  39
  40         verifyDisplayableString("getDisplayableAverageDuration",
  41                 tracker.getDisplayableAverageDuration(), "20.0");
  42         verifyDisplayableString("getDisplayableLongestDuration",
  43                 tracker.getDisplayableLongestDuration(), "30.0");
  44         verifyDisplayableString("getDisplayableShortestDuration",
  45                 tracker.getDisplayableShortestDuration(), "10.0");
  46
  47         tracker.addDuration(10000);
  48         assertEquals("getTotalDurations", 3, tracker.getTotalDurations());
  49         assertEquals("getAverageDuration", 16666.0, tracker.getAverageDuration(), 1.0);
  50         assertEquals("getLongestDuration", 30000, tracker.getLongestDuration());
  51         assertEquals("getShortestDuration", 10000, tracker.getShortestDuration());
  52
  53         tracker.addDuration(5000);
  54         assertEquals("getTotalDurations", 4, tracker.getTotalDurations());
  55         assertEquals("getAverageDuration", 13750.0, tracker.getAverageDuration(), 1.0);
  56         assertEquals("getLongestDuration", 30000, tracker.getLongestDuration());
  57         assertEquals("getShortestDuration", 5000, tracker.getShortestDuration());
  58
  59         tracker.reset();
  60         assertEquals("getTotalDurations", 0, tracker.getTotalDurations());
  61         assertEquals("getAverageDuration", 0.0, tracker.getAverageDuration(), 0.1);
  62         assertEquals("getLongestDuration", 0, tracker.getLongestDuration());
  63         assertEquals("getShortestDuration", 0, tracker.getShortestDuration());
  64
  65         tracker.addDuration(10000);
  66         assertEquals("getTotalDurations", 1, tracker.getTotalDurations());
  67         assertEquals("getAverageDuration", 10000.0, tracker.getAverageDuration(), 0.1);
  68         assertEquals("getLongestDuration", 10000, tracker.getLongestDuration());
  69         assertEquals("getShortestDuration", 10000, tracker.getShortestDuration());
  70     }
  71
  72     private static void verifyDisplayableString(final String name, final String actual, final String expPrefix) {
  73         assertTrue(name + " starts with " + expPrefix + ". Actual: " + actual,
  74                 actual.startsWith(expPrefix));
  75     }
  76 }