BasicStopwatchTest.java

/**
 * Copyright 2013 Netflix, Inc.
 * <p/>
 * Licensed 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.netflix.servo.monitor;

import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

import static org.testng.Assert.assertTrue;

public class BasicStopwatchTest {
  private BasicStopwatch testStopwatch;

  @BeforeMethod
  public void setupTest() throws Exception {
    testStopwatch = new BasicStopwatch();
  }

  @Test
  public void testReset() throws Exception {
    testStopwatch.start();
    Thread.sleep(10);
    testStopwatch.stop();
    assertTrue(testStopwatch.getDuration() > 0);

    testStopwatch.reset();
    assertTrue(testStopwatch.getDuration() == 0);
  }

  @Test
  public void testGetDuration() throws Exception {
    testStopwatch.start();
    Thread.sleep(10);
    testStopwatch.stop();

    assertTrue(testStopwatch.getDuration() > 9000000);
  }

  @Test
  public void testGetDurationBeforeStop() throws Exception {
    testStopwatch.start();
    Thread.sleep(10);
    assertTrue(testStopwatch.getDuration() > 9000000);
    testStopwatch.stop();
    assertTrue(testStopwatch.getDuration() > 9000000);
  }

  @Test
  public void testGetDurationWithUnit() throws Exception {
    testStopwatch.start();
    Thread.sleep(10);
    testStopwatch.stop();

    assertTrue(testStopwatch.getDuration() > 12);
  }
}