package org.apache.maven.surefire.junitcore;
   
   /*
    * 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.common.junit4.JUnit4RunListener;
  import org.apache.maven.surefire.report.ConsoleOutputReceiver;
  import org.apache.maven.surefire.report.RunListener;
  import org.apache.maven.surefire.report.SimpleReportEntry;
  import org.apache.maven.surefire.testset.TestSetFailedException;
  import org.junit.runner.Description;
  import org.junit.runner.Result;
  import org.junit.runner.notification.Failure;
  
  /**
   * A class to be used when there is no JUnit parallelism (methods or/and class). This allow to workaround JUnit
   * limitation a la Junit4 provider. Specifically, we can redirect properly the output even if we don't have class
   * demarcation in JUnit. It works when if there is a JVM instance per test run, i.e. with forkMode=always or perthread.
   */
  public class NonConcurrentRunListener
      extends JUnit4RunListener
      implements ConsoleOutputReceiver
  {
  
      private Description currentTestSetDescription;
  
      private Description lastFinishedDescription;
  
      public NonConcurrentRunListener( RunListener reporter )
          throws TestSetFailedException
      {
          super( reporter );
      }
  
      public synchronized void writeTestOutput( byte[] buf, int off, int len, boolean stdout )
      {
          // We can write immediately: no parallelism and a single class.
          ( (ConsoleOutputReceiver) reporter ).writeTestOutput( buf, off, len, stdout );
      }
  
      protected SimpleReportEntry createReportEntry( Description description )
      {
          return new SimpleReportEntry( description.getClassName(), description.getDisplayName() );
      }
  
      protected SimpleReportEntry createReportEntryForTestSet( Description description )
      {
          return new SimpleReportEntry( description.getClassName(), description.getClassName() );
      }
  
      @Override
      public void testStarted( Description description )
          throws Exception
      {
          finishLastTestSetIfNecessary( description );
          super.testStarted( description );
      }
  
      private void finishLastTestSetIfNecessary( Description description )
      {
          if ( describesNewTestSet( description ) )
          {
              currentTestSetDescription = description;
              if ( lastFinishedDescription != null )
              {
                  reporter.testSetCompleted( createReportEntryForTestSet( lastFinishedDescription ) );
                  lastFinishedDescription = null;
              }
              reporter.testSetStarting( createReportEntryForTestSet( description ) );
          }
      }
  
      private boolean describesNewTestSet( Description description )
      {
          if ( currentTestSetDescription != null )
          {
              if ( null != description.getTestClass() )
              {
                  return !description.getTestClass().equals( currentTestSetDescription.getTestClass() );
              }
              else if ( description.isSuite() )
              {
                  return description.getChildren().equals( currentTestSetDescription.getChildren() );
             }
 
             return false;
         }
 
         return true;
     }
 
     @Override
     public void testFinished( Description description )
         throws Exception
     {
         super.testFinished( description );
         this.lastFinishedDescription = description;
     }
 
     @Override
     public void testIgnored( Description description )
         throws Exception
     {
         finishLastTestSetIfNecessary( description );
 
         super.testIgnored( description );
         this.lastFinishedDescription = description;
     }
 
     @Override
     public void testFailure( Failure failure )
         throws Exception
     {
         finishLastTestSetIfNecessary( failure.getDescription() );
 
         super.testFailure( failure );
         this.lastFinishedDescription = failure.getDescription();
     }
 
     @Override
     public void testAssumptionFailure( Failure failure )
     {
         super.testAssumptionFailure( failure );
         this.lastFinishedDescription = failure.getDescription();
     }
 
     @Override
     public void testRunStarted( Description description )
         throws Exception
     {
     }
 
     @Override
     public void testRunFinished( Result result )
         throws Exception
     {
         if ( lastFinishedDescription != null )
         {
             reporter.testSetCompleted( createReportEntryForTestSet( lastFinishedDescription ) );
             lastFinishedDescription = null;
         }
     }
 }