InMemoryCacheTest.java

package org.lodder.subtools.sublibrary.cache;

import org.junit.Before;
import org.junit.Test;

public class InMemoryCacheTest {

  @Before
  public void setUp() throws Exception {}

  @Test 
  public void testAddRemoveObjects() {
    // Test with timeToLiveInSeconds = 200 seconds
    // timerIntervalInSeconds = 500 seconds
    // maxItems = 6
    InMemoryCache<String, String> cache = new InMemoryCache<String, String>(200, 500, 6);

    cache.put("eBay", "eBay");
    cache.put("Paypal", "Paypal");
    cache.put("Google", "Google");
    cache.put("Microsoft", "Microsoft");
    cache.put("IBM", "IBM");
    cache.put("Facebook", "Facebook");

    System.out.println("6 Cache Object Added.. cache.size(): " + cache.size());
    cache.remove("IBM");
    System.out.println("One object removed.. cache.size(): " + cache.size());

    cache.put("Twitter", "Twitter");
    cache.put("SAP", "SAP");
    System.out.println("Two objects Added but reached maxItems.. cache.size(): " + cache.size());

}

  @Test 
  public void testExpiredCacheObjects() throws InterruptedException {

    // Test with timeToLiveInSeconds = 1 second
    // timerIntervalInSeconds = 1 second
    // maxItems = 10
  InMemoryCache<String, String> cache = new InMemoryCache<String, String>(1, 1, 10);

    cache.put("eBay", "eBay");
    cache.put("Paypal", "Paypal");
    // Adding 3 seconds sleep.. Both above objects will be removed from
    // Cache because of timeToLiveInSeconds value
    Thread.sleep(3000);

    System.out.println("Two objects are added but reached timeToLive. cache.size(): " + cache.size());
}

  @Test 
  public void testObjectsCleanupTime() throws InterruptedException {
    int size = 500000;

    // Test with timeToLiveInSeconds = 100 seconds
    // timerIntervalInSeconds = 100 seconds
    // maxItems = 500000

    InMemoryCache<String, String> cache = new InMemoryCache<String, String>(100, 100, 500000);

    for (int i = 0; i < size; i++) {
        String value = Integer.toString(i);
        cache.put(value, value);
    }

    Thread.sleep(200);

    long start = System.currentTimeMillis();
    cache.cleanup();
    double finish = (double) (System.currentTimeMillis() - start) / 1000.0;

    System.out.println("Cleanup times for " + size + " objects are " + finish + " s");

}

}