package org.apache.maven.surefire.junit4;
   
   /*
    * 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 java.util.Iterator;
  import java.util.List;
  import org.apache.maven.surefire.common.junit4.JUnit4RunListener;
  import org.apache.maven.surefire.common.junit4.JUnit4RunListenerFactory;
  import org.apache.maven.surefire.common.junit4.JUnit4TestChecker;
  import org.apache.maven.surefire.providerapi.AbstractProvider;
  import org.apache.maven.surefire.providerapi.ProviderParameters;
  import org.apache.maven.surefire.report.ConsoleOutputCapture;
  import org.apache.maven.surefire.report.ConsoleOutputReceiver;
  import org.apache.maven.surefire.report.PojoStackTraceWriter;
  import org.apache.maven.surefire.report.ReportEntry;
  import org.apache.maven.surefire.report.ReporterException;
  import org.apache.maven.surefire.report.ReporterFactory;
  import org.apache.maven.surefire.report.RunListener;
  import org.apache.maven.surefire.report.SimpleReportEntry;
  import org.apache.maven.surefire.suite.RunResult;
  import org.apache.maven.surefire.testset.TestSetFailedException;
  import org.apache.maven.surefire.util.DefaultDirectoryScanner;
  import org.apache.maven.surefire.util.DirectoryScanner;
  import org.apache.maven.surefire.util.TestsToRun;
  
  import org.junit.runner.Result;
  import org.junit.runner.notification.RunNotifier;
  
  /**
   * @author Kristian Rosenvold
   */
  public class JUnit4Provider
      extends AbstractProvider
  {
      private final ClassLoader testClassLoader;
  
      private final DirectoryScanner directoryScanner;
  
      private final List<org.junit.runner.notification.RunListener> customRunListeners;
  
      private final JUnit4TestChecker jUnit4TestChecker;
  
      private final String requestedTestMethod;
  
      private TestsToRun testsToRun;
  
      private final ProviderParameters providerParameters;
  
      public JUnit4Provider( ProviderParameters booterParameters )
      {
          this.providerParameters = booterParameters;
          this.testClassLoader = booterParameters.getTestClassLoader();
          this.directoryScanner = booterParameters.getDirectoryScanner();
          customRunListeners = JUnit4RunListenerFactory.
              createCustomListeners( booterParameters.getProviderProperties().getProperty( "listener" ) );
          jUnit4TestChecker = new JUnit4TestChecker( testClassLoader );
          requestedTestMethod = booterParameters.getTestRequest().getRequestedTestMethod();
  
      }
  
      public RunResult invoke( Object forkTestSet )
          throws TestSetFailedException, ReporterException
      {
          if ( testsToRun == null )
          {
              testsToRun = forkTestSet == null ? scanClassPath() : TestsToRun.fromClass( (Class) forkTestSet );
          }
  
          upgradeCheck();
  
          final ReporterFactory reporterFactory = providerParameters.getReporterFactory();
  
          final RunListener reporter = reporterFactory.createReporter();
  
  
          ConsoleOutputCapture.startCapture( (ConsoleOutputReceiver) reporter );
  
          JUnit4RunListener jUnit4TestSetReporter = new JUnit4RunListener( reporter );
  
          Result result = new Result();
          RunNotifier runNotifer = getRunNotifer( jUnit4TestSetReporter, result, customRunListeners );
  
         runNotifer.fireTestRunStarted( null );
 
         for ( Class clazz : testsToRun.getLocatedClasses() )
         {
             executeTestSet( clazz, reporter, runNotifer );
         }
 
         runNotifer.fireTestRunFinished( result );
 
         closeRunNotifer( jUnit4TestSetReporter, customRunListeners );
 
         return reporterFactory.close();
     }
 
     private void executeTestSet( Class clazz, RunListener reporter, RunNotifier listeners )
         throws ReporterException, TestSetFailedException
     {
         final ReportEntry report = new SimpleReportEntry( this.getClass().getName(), clazz.getName() );
 
         reporter.testSetStarting( report );
 
         try
         {
             JUnit4TestSet.execute( clazz, listeners, this.requestedTestMethod );
         }
         catch ( TestSetFailedException e )
         {
             throw e;
         }
         catch ( Throwable e )
         {
             reporter.testError( new SimpleReportEntry( report.getSourceName(), report.getName(),
                                                        new PojoStackTraceWriter( report.getSourceName(),
                                                                                  report.getName(), e ) ) );
         }
         finally
         {
             reporter.testSetCompleted( report );
         }
     }
 
     private RunNotifier getRunNotifer( org.junit.runner.notification.RunListener main, Result result, List<org.junit.runner.notification.RunListener> others )
     {
         RunNotifier fNotifier = new RunNotifier();
         fNotifier.addListener( main );
         fNotifier.addListener(  result.createListener() );
         for ( org.junit.runner.notification.RunListener listener : others )
         {
             fNotifier.addListener( listener );
         }
         return fNotifier;
     }
 
     // I am not entierly sure as to why we do this explicit freeing, it's one of those
     // pieces of code that just seem to linger on in here ;)
     private void closeRunNotifer( org.junit.runner.notification.RunListener main,
                                   List<org.junit.runner.notification.RunListener> others )
     {
         RunNotifier fNotifier = new RunNotifier();
         fNotifier.removeListener( main );
         for ( org.junit.runner.notification.RunListener listener : others )
         {
             fNotifier.removeListener( listener );
         }
     }
 
     public Iterator getSuites()
     {
         testsToRun = scanClassPath();
         return testsToRun.iterator();
     }
 
     private TestsToRun scanClassPath()
     {
         return directoryScanner.locateTestClasses( testClassLoader, jUnit4TestChecker );
     }
 
     private void upgradeCheck()
         throws TestSetFailedException
     {
         if ( isJunit4UpgradeCheck()
             && ( (DefaultDirectoryScanner) directoryScanner ).getClassesSkippedByValidation().size() > 0 )
         {
             StringBuilder reason = new StringBuilder();
             reason.append( "Updated check failed\n" );
             reason.append( "There are tests that would be run with junit4 / surefire 2.6 but not with [2.7,):\n" );
             //noinspection unchecked
             for ( Class testClass : (List<Class>) ( (DefaultDirectoryScanner) directoryScanner ).getClassesSkippedByValidation() )
             {
                 reason.append( "   " );
                 reason.append( testClass.getCanonicalName() );
                 reason.append( "\n" );
             }
             throw new TestSetFailedException( reason.toString() );
         }
     }
 
     private boolean isJunit4UpgradeCheck()
     {
         final String property = System.getProperty( "surefire.junit4.upgradecheck" );
         return property != null;
     }
 }