PerformanceWindowTest.java

/*
 * Copyright 2013-2015 EMC Corporation. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 * http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 * or in the "license" file accompanying this file. This file 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.emc.ecs.sync.util;

import org.junit.Test;

import static org.junit.Assert.*;

/**
 * Test the PerformanceWindow class
 */
public class PerformanceWindowTest {

    @Test
    public void testPerformanceWindowSum() throws Exception {
        PerformanceWindow pw = new PerformanceWindow(500, 10);

        pw.increment(1000);
        pw.increment(30000);

        // Wait for stats to update
        Thread.sleep(1100);

        assertEquals("Sum incorrect", 31000, pw.getWindowSum());
        pw.close();
    }

    @Test
    public void testPerformanceWindowDuration() throws Exception {
        PerformanceWindow pw = new PerformanceWindow(500, 10);

        Thread.sleep(6000);

        assertTrue("Window should be at least 4500ms", 4500 < pw.getWindowDuration());
        pw.close();
    }

    @Test
    public void testPerformanceWindowRate() throws Exception {
        PerformanceWindow pw = new PerformanceWindow(500, 10);

        pw.increment(30000);
        pw.increment(1000);

        Thread.sleep(1100);
        pw.close();

        assertEquals("Incorrect rate", 31000.0, (double)pw.getWindowRate(), 500.0);
    }

}