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.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  
  import java.io.DataInputStream;
  import java.io.IOException;
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  import static org.apache.maven.plugin.surefire.booterclient.lazytestprovider.TestLessInputStream.TestLessInputStreamBuilder;
  import static org.apache.maven.surefire.booter.Command.NOOP;
  import static org.apache.maven.surefire.booter.Command.SKIP_SINCE_NEXT_TEST;
  import static org.apache.maven.surefire.booter.MasterProcessCommand.BYE_ACK;
  import static org.apache.maven.surefire.booter.MasterProcessCommand.SHUTDOWN;
  import static org.apache.maven.surefire.booter.MasterProcessCommand.decode;
  import static org.apache.maven.surefire.booter.Shutdown.EXIT;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.is;
  import static org.hamcrest.Matchers.notNullValue;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Testing cached and immediate commands in {@link TestLessInputStream}.
   *
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.19
   */
  public class TestLessInputStreamBuilderTest
  {
      @Rule
      public final ExpectedException e = ExpectedException.none();
  
      @Test
      public void cachableCommandsShouldBeIterableWithStillOpenIterator()
      {
          TestLessInputStreamBuilder builder = new TestLessInputStreamBuilder();
          TestLessInputStream is = builder.build();
          Iterator<Command> iterator = builder.getIterableCachable().iterator();
  
          assertFalse( iterator.hasNext() );
  
          builder.getCachableCommands().skipSinceNextTest();
          assertTrue( iterator.hasNext() );
          assertThat( iterator.next(), is( SKIP_SINCE_NEXT_TEST ) );
  
          assertFalse( iterator.hasNext() );
  
          builder.getCachableCommands().noop();
          assertTrue( iterator.hasNext() );
          assertThat( iterator.next(), is( NOOP ) );
  
          builder.removeStream( is );
      }
  
      @Test
      public void immediateCommands()
          throws IOException
      {
          TestLessInputStreamBuilder builder = new TestLessInputStreamBuilder();
          TestLessInputStream is = builder.build();
          assertThat( is.availablePermits(), is( 0 ) );
          is.noop();
          assertThat( is.availablePermits(), is( 1 ) );
          is.beforeNextCommand();
          assertThat( is.availablePermits(), is( 0 ) );
          assertThat( is.nextCommand(), is( NOOP ) );
          assertThat( is.availablePermits(), is( 0 ) );
          e.expect( NoSuchElementException.class );
          is.nextCommand();
      }
  
      @Test
      public void combinedCommands()
          throws IOException
      {
         TestLessInputStreamBuilder builder = new TestLessInputStreamBuilder();
         TestLessInputStream is = builder.build();
         assertThat( is.availablePermits(), is( 0 ) );
         builder.getCachableCommands().skipSinceNextTest();
         is.noop();
         assertThat( is.availablePermits(), is( 2 ) );
         is.beforeNextCommand();
         assertThat( is.availablePermits(), is( 1 ) );
         assertThat( is.nextCommand(), is( NOOP ) );
         assertThat( is.availablePermits(), is( 1 ) );
         builder.getCachableCommands().skipSinceNextTest();
         assertThat( is.availablePermits(), is( 1 ) );
         builder.getImmediateCommands().shutdown( EXIT );
         assertThat( is.availablePermits(), is( 2 ) );
         is.beforeNextCommand();
         assertThat( is.nextCommand().getCommandType(), is( SHUTDOWN ) );
         assertThat( is.availablePermits(), is( 1 ) );
         is.beforeNextCommand();
         assertThat( is.nextCommand(), is( SKIP_SINCE_NEXT_TEST ) );
         assertThat( is.availablePermits(), is( 0 ) );
         builder.getImmediateCommands().noop();
         assertThat( is.availablePermits(), is( 1 ) );
         builder.getCachableCommands().shutdown( EXIT );
         builder.getCachableCommands().shutdown( EXIT );
         assertThat( is.availablePermits(), is( 2 ) );
         is.beforeNextCommand();
         assertThat( is.nextCommand(), is( NOOP ) );
         assertThat( is.availablePermits(), is( 1 ) );
         is.beforeNextCommand();
         assertThat( is.nextCommand().getCommandType(), is( SHUTDOWN ) );
         assertThat( is.availablePermits(), is( 0 ) );
         e.expect( NoSuchElementException.class );
         is.nextCommand();
     }
 
     @Test
     public void shouldDecodeTwoCommands()
             throws IOException
     {
         TestLessInputStreamBuilder builder = new TestLessInputStreamBuilder();
         TestLessInputStream pluginIs = builder.build();
         builder.getImmediateCommands().acknowledgeByeEventReceived();
         builder.getImmediateCommands().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 ) );
     }
 }