content: /*
   * 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.activemq.artemis.tests.unit.util;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.activemq.artemis.utils.AutomaticLatch;
  import org.junit.jupiter.api.Test;
  
  public class AutomaticLatchTest {
  
     @Test
     public void testWthPending() {
        AtomicInteger value = new AtomicInteger(0);
        AutomaticLatch latch = new AutomaticLatch(1);
        latch.afterCompletion(() -> value.incrementAndGet());
        assertEquals(0, value.get());
  
        latch.countDown();
  
        assertEquals(1, value.get());
     }
  
     @Test
     public void testWthoutPending() {
        AtomicInteger value = new AtomicInteger(0);
        AutomaticLatch latch = new AutomaticLatch(0);
        latch.afterCompletion(() -> value.incrementAndGet());
        assertEquals(1, value.get());
        latch.countUp();
        latch.countDown();
  
        // the previous latch completion should been cleared by now
        assertEquals(1, value.get());
  
        latch.afterCompletion(() -> value.addAndGet(10));
        assertEquals(11, value.get());
  
        latch.countUp();
        latch.countDown();
  
        assertEquals(11, value.get());
     }
  
     @Test
     public void testMultipleCallsOrder() {
        List<Integer> outcome = new ArrayList<>();
        AutomaticLatch latch = new AutomaticLatch(1);
        latch.afterCompletion(() -> outcome.add(0));
        latch.afterCompletion(() -> outcome.add(1));
        latch.afterCompletion(() -> outcome.add(2));
  
        latch.countDown();
  
        assertEquals((Integer)0, outcome.get(0));
        assertEquals((Integer)1, outcome.get(1));
        assertEquals((Integer)2, outcome.get(2));
  
        assertEquals(3, outcome.size());
     }
  
  
  }
  