| /* |
| * |
| * 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.qpid.server.stats; |
| |
| import org.apache.qpid.test.utils.QpidTestCase; |
| |
| /** |
| * Unit tests for the {@link StatisticsCounter} class. |
| */ |
| public class StatisticsCounterTest extends QpidTestCase |
| { |
| /** |
| * Check that statistics counters are created correctly. |
| */ |
| public void testCreate() |
| { |
| long before = System.currentTimeMillis(); |
| StatisticsCounter counter = new StatisticsCounter("name", 1234L); |
| long after = System.currentTimeMillis(); |
| |
| assertTrue(before <= counter.getStart()); |
| assertTrue(after >= counter.getStart()); |
| assertTrue(counter.getName().startsWith("name-")); |
| assertEquals(1234L, counter.getPeriod()); |
| } |
| |
| /** |
| * Check that totals add up correctly. |
| */ |
| public void testTotal() |
| { |
| StatisticsCounter counter = new StatisticsCounter("test", 1000L); |
| long start = counter.getStart(); |
| for (int i = 0; i < 100; i++) |
| { |
| counter.registerEvent(i, start + i); |
| } |
| assertEquals(99 * 50, counter.getTotal()); // cf. Gauss |
| } |
| |
| /** |
| * Test totals add up correctly even when messages are delivered |
| * out-of-order. |
| */ |
| public void testTotalOutOfOrder() |
| { |
| StatisticsCounter counter = new StatisticsCounter("test", 1000L); |
| long start = counter.getStart(); |
| assertEquals(0, counter.getTotal()); |
| counter.registerEvent(10, start + 2500); |
| assertEquals(10, counter.getTotal()); |
| counter.registerEvent(20, start + 1500); |
| assertEquals(30, counter.getTotal()); |
| counter.registerEvent(10, start + 500); |
| assertEquals(40, counter.getTotal()); |
| } |
| |
| /** |
| * Test that the peak rate is reported correctly. |
| */ |
| public void testPeak() throws Exception |
| { |
| StatisticsCounter counter = new StatisticsCounter("test", 1000L); |
| long start = counter.getStart(); |
| assertEquals(0.0, counter.getPeak()); |
| Thread.sleep(500); |
| counter.registerEvent(1000, start + 500); |
| Thread.sleep(1000); |
| assertEquals(1000.0, counter.getPeak()); |
| counter.registerEvent(2000, start + 1500); |
| Thread.sleep(1000); |
| assertEquals(2000.0, counter.getPeak()); |
| counter.registerEvent(1000, start + 2500); |
| Thread.sleep(1000); |
| assertEquals(2000.0, counter.getPeak()); |
| } |
| |
| /** |
| * Test the current rate is generated correctly. |
| */ |
| public void testRate() throws Exception |
| { |
| StatisticsCounter counter = new StatisticsCounter("test", 1000L); |
| assertEquals(0.0, counter.getRate()); |
| Thread.sleep(500); |
| counter.registerEvent(1000); |
| Thread.sleep(1000); |
| assertEquals(1000.0, counter.getRate()); |
| counter.registerEvent(2000); |
| Thread.sleep(1000); |
| assertEquals(2000.0, counter.getRate()); |
| counter.registerEvent(1000); |
| Thread.sleep(1000); |
| assertEquals(1000.0, counter.getRate()); |
| Thread.sleep(1000); |
| assertEquals(0.0, counter.getRate()); |
| } |
| } |