package org.apache.maven.surefire.junitcore.pc;
   
   /*
    * 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.
   */
  
  import org.apache.maven.surefire.report.ConsoleStream;
  import org.apache.maven.surefire.report.DefaultDirectConsoleReporter;
  import org.junit.Test;
  
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.ThreadFactory;
  
  import static org.apache.maven.surefire.util.internal.DaemonThreadFactory.newDaemonThreadFactory;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Tests the factories in SchedulingStrategy.
   * <br>
   * Th point of these tests is to check {@link Task#result} if changed
   * from {@code false} to {@code true} after all scheduled tasks
   * have finished.
   * The call {@link SchedulingStrategy#finished()} is waiting until the
   * strategy has finished.
   * Then {@link Task#result} should be asserted that is {@code true}.
   *
   * @author Tibor Digana (tibor17)
   * @see SchedulingStrategy
   * @since 2.16
   */
  public class SchedulingStrategiesTest
  {
      private static final ThreadFactory DAEMON_THREAD_FACTORY = newDaemonThreadFactory();
      private final ConsoleStream logger = new DefaultDirectConsoleReporter( System.out );
  
      @Test
      public void invokerStrategy()
          throws InterruptedException
      {
          SchedulingStrategy strategy = SchedulingStrategies.createInvokerStrategy( logger );
          assertFalse( strategy.hasSharedThreadPool() );
          assertTrue( strategy.canSchedule() );
  
          Task task = new Task();
  
          strategy.schedule( task );
  
          assertTrue( strategy.canSchedule() );
  
          assertTrue( task.result );
  
          assertTrue( strategy.finished() );
          assertFalse( strategy.canSchedule() );
      }
  
      @Test
      public void nonSharedPoolStrategy()
          throws InterruptedException
      {
          SchedulingStrategy strategy = SchedulingStrategies.createParallelStrategy( logger,  2 );
          assertFalse( strategy.hasSharedThreadPool() );
          assertTrue( strategy.canSchedule() );
  
          Task task1 = new Task();
          Task task2 = new Task();
  
          strategy.schedule( task1 );
          strategy.schedule( task2 );
  
          assertTrue( strategy.canSchedule() );
  
          assertTrue( strategy.finished() );
          assertFalse( strategy.canSchedule() );
  
          assertTrue( task1.result );
          assertTrue( task2.result );
      }
  
      @Test(expected = NullPointerException.class)
      public void sharedPoolStrategyNullPool()
      {
          SchedulingStrategies.createParallelSharedStrategy( logger, null );
     }
 
     @Test
     public void sharedPoolStrategy()
         throws InterruptedException
     {
         ExecutorService sharedPool = Executors.newCachedThreadPool( DAEMON_THREAD_FACTORY );
 
         SchedulingStrategy strategy1 = SchedulingStrategies.createParallelSharedStrategy( logger, sharedPool );
         assertTrue( strategy1.hasSharedThreadPool() );
         assertTrue( strategy1.canSchedule() );
 
         SchedulingStrategy strategy2 = SchedulingStrategies.createParallelSharedStrategy( logger, sharedPool );
         assertTrue( strategy2.hasSharedThreadPool() );
         assertTrue( strategy2.canSchedule() );
 
         Task task1 = new Task();
         Task task2 = new Task();
         Task task3 = new Task();
         Task task4 = new Task();
 
         strategy1.schedule( task1 );
         strategy2.schedule( task2 );
         strategy1.schedule( task3 );
         strategy2.schedule( task4 );
 
         assertTrue( strategy1.canSchedule() );
         assertTrue( strategy2.canSchedule() );
 
         assertTrue( strategy1.finished() );
         assertFalse( strategy1.canSchedule() );
 
         assertTrue( strategy2.finished() );
         assertFalse( strategy2.canSchedule() );
 
         assertTrue( task1.result );
         assertTrue( task2.result );
         assertTrue( task3.result );
         assertTrue( task4.result );
     }
 
     @Test
     public void infinitePoolStrategy()
         throws InterruptedException
     {
         SchedulingStrategy strategy = SchedulingStrategies.createParallelStrategyUnbounded( logger );
         assertFalse( strategy.hasSharedThreadPool() );
         assertTrue( strategy.canSchedule() );
 
         Task task1 = new Task();
         Task task2 = new Task();
 
         strategy.schedule( task1 );
         strategy.schedule( task2 );
 
         assertTrue( strategy.canSchedule() );
 
         assertTrue( strategy.finished() );
         assertFalse( strategy.canSchedule() );
 
         assertTrue( task1.result );
         assertTrue( task2.result );
     }
 
     static class Task
         implements Runnable
     {
         volatile boolean result = false;
 
         @Override
         public void run()
         {
             result = true;
         }
     }
 }