package org.apache.maven.plugin.surefire.booterclient.lazytestprovider;
   
   /*
    * 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.booter.Command;
  import org.apache.maven.surefire.booter.MasterProcessCommand;
  import org.junit.Test;
  
  import java.io.DataInputStream;
  import java.io.IOException;
  import java.util.ArrayDeque;
  import java.util.Queue;
  import java.util.concurrent.Callable;
  import java.util.concurrent.ConcurrentLinkedQueue;
  import java.util.concurrent.FutureTask;
  import java.util.concurrent.TimeUnit;
  
  import static org.apache.maven.surefire.booter.MasterProcessCommand.BYE_ACK;
  import static org.apache.maven.surefire.booter.MasterProcessCommand.decode;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.*;
  
  /**
   * Asserts that this stream properly reads bytes from queue.
   *
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.19
   */
  public class TestProvidingInputStreamTest
  {
      @Test
      public void closedStreamShouldReturnEndOfStream()
          throws IOException
      {
          Queue<String> commands = new ArrayDeque<String>();
          TestProvidingInputStream is = new TestProvidingInputStream( commands );
          is.close();
          assertThat( is.read(), is( -1 ) );
      }
  
      @Test
      public void emptyStreamShouldWaitUntilClosed()
          throws Exception
      {
          Queue<String> commands = new ArrayDeque<String>();
          final TestProvidingInputStream is = new TestProvidingInputStream( commands );
          final Thread streamThread = Thread.currentThread();
          FutureTask<Thread.State> futureTask = new FutureTask<Thread.State>( new Callable<Thread.State>()
          {
              @Override
              public Thread.State call()
              {
                  sleep( 1000 );
                  Thread.State state = streamThread.getState();
                  is.close();
                  return state;
              }
          } );
          Thread assertionThread = new Thread( futureTask );
          assertionThread.start();
          assertThat( is.read(), is( -1 ) );
          Thread.State state = futureTask.get();
          assertThat( state, is( Thread.State.WAITING ) );
      }
  
      @Test
      public void finishedTestsetShouldNotBlock()
          throws IOException
      {
          Queue<String> commands = new ArrayDeque<String>();
          final TestProvidingInputStream is = new TestProvidingInputStream( commands );
          is.testSetFinished();
          new Thread( new Runnable()
          {
              @Override
              public void run()
              {
                  is.provideNewTest();
              }
          } ).start();
          assertThat( is.read(), is( 0 ) );
          assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 1 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         is.close();
         assertThat( is.read(), is( -1 ) );
     }
 
     @Test
     public void shouldReadTest()
         throws IOException
     {
         Queue<String> commands = new ArrayDeque<String>();
         commands.add( "Test" );
         final TestProvidingInputStream is = new TestProvidingInputStream( commands );
         new Thread( new Runnable()
         {
             @Override
             public void run()
             {
                 is.provideNewTest();
             }
         } ).start();
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 0 ) );
         assertThat( is.read(), is( 4 ) );
         assertThat( is.read(), is( (int) 'T' ) );
         assertThat( is.read(), is( (int) 'e' ) );
         assertThat( is.read(), is( (int) 's' ) );
         assertThat( is.read(), is( (int) 't' ) );
     }
 
     @Test
     public void shouldDecodeTwoCommands()
             throws IOException
     {
         TestProvidingInputStream pluginIs = new TestProvidingInputStream( new ConcurrentLinkedQueue<String>() );
         pluginIs.acknowledgeByeEventReceived();
         pluginIs.noop();
         DataInputStream is = new DataInputStream( pluginIs );
         Command bye = decode( is );
         assertThat( bye, is( notNullValue() ) );
         assertThat( bye.getCommandType(), is( BYE_ACK ) );
         Command noop = decode( is );
         assertThat( noop, is( notNullValue() ) );
         assertThat( noop.getCommandType(), is( MasterProcessCommand.NOOP ) );
     }
 
     private static void sleep( long millis )
     {
         try
         {
             TimeUnit.MILLISECONDS.sleep( millis );
         }
         catch ( InterruptedException e )
         {
             // do nothing
         }
     }
 }