content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.util.executor;
  
  import static org.junit.Assert.assertEquals;
  
  import org.junit.Test;
  
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  
  /**
   * Tests the {@link UniqueBlockingQueue}.
   */
  public class UniqueBlockingQueueTest {
    @Test
    public void uniqueness() throws Exception {
      UniqueBlockingQueue<Integer> test = new UniqueBlockingQueue<>(4);
      assertEquals(0, test.size());
      test.put(1);
      test.put(1);
      assertEquals(1, test.size());
      test.put(2);
      assertEquals(2, test.size());
      assertEquals(1, test.poll().intValue());
      assertEquals(2, test.poll().intValue());
    }
  
    @Test
    public void concurrentTest() throws Exception {
      UniqueBlockingQueue<Integer> test = new UniqueBlockingQueue<>(100);
      ExecutorService executor = Executors.newFixedThreadPool(5);
      for (int i = 0; i < 5; i++) {
        executor.submit(() -> {
          for (int j = 0; j < 20; j++) {
            try {
              test.put(j);
            } catch (InterruptedException e) {
              // do nothing
            }
          }
        });
      }
      executor.shutdown();
      assertEquals(20, test.size());
    }
  }
  