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.leak;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Random;
  
  import io.github.checkleak.core.CheckLeak;
  import org.apache.activemq.artemis.utils.collections.LinkedListImpl;
  import org.apache.activemq.artemis.utils.collections.LinkedListIterator;
  import org.junit.jupiter.api.Test;
  
  public class LinkedListMemoryTest extends AbstractLeakTest {
  
     Random random = new Random();
  
     CheckLeak checkLeak = new CheckLeak();
  
     public int randomInt(int x, int y) {
  
        int randomNumber = random.nextInt(y - x + 1) + x;
  
        return randomNumber;
     }
  
     @Test
     public void testRemoveIteratorsRandom() throws Exception {
        LinkedListImpl<String> linkedList = new LinkedListImpl<>((a, b) -> a.compareTo(b));
  
        linkedList.addSorted("Test");
  
        int iterators = 100;
        List<LinkedListIterator> listIerators = new ArrayList();
  
        for (int i = 0; i < iterators; i++) {
           listIerators.add(linkedList.iterator());
        }
  
        int countRemoved = 0;
  
        while (!listIerators.isEmpty()) {
           int removeElement = randomInt(0, listIerators.size() - 1);
           countRemoved++;
           LinkedListIterator toRemove = listIerators.remove(removeElement);
           toRemove.close();
           toRemove = null;
           MemoryAssertions.assertMemory(checkLeak, iterators - countRemoved, LinkedListImpl.Iterator.class.getName());
        }
        MemoryAssertions.assertMemory(checkLeak, 0, LinkedListImpl.Iterator.class.getName());
     }
  }
  