package org.apache.maven.surefire.its;
   /*
    * 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.it.VerificationException;
  import org.apache.maven.it.Verifier;
  import org.apache.maven.it.util.ResourceExtractor;
  import org.apache.maven.surefire.its.misc.HelperAssertions;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileReader;
  import java.io.IOException;
  import java.util.List;
  
  /**
   * Test forkMode
   *
   * @author <a href="mailto:dfabulich@apache.org">Dan Fabulich</a>
   */
  public class ForkModeIT
      extends AbstractSurefireIntegrationTestClass
  {
      public void testForkModeAlways()
          throws Exception
      {
          String[] pids = doTest( "always" );
  
          assertDifferentPids( pids );
      }
  
      public void testForkModePerTest()
          throws Exception
      {
          String[] pids = doTest( "pertest" );
  
          assertDifferentPids( pids );
      }
  
      public void testForkModeNever()
          throws Exception
      {
          String[] pids = doTest( "never" );
  
          assertSamePids( pids );
      }
  
      public void testForkModeNone()
          throws Exception
      {
          String[] pids = doTest( "none" );
  
          assertSamePids( pids );
      }
  
      public void testForkModeOnce()
          throws Exception
      {
          String[] pids = doTest( "once" );
          // DGF It would be nice to assert that "once" was different
          // from "never" ... but there's no way to check the PID of
          // Maven itself.  No matter, "once" is tested by setting
          // argLine, which can't be done except by forking.
          assertSamePids( pids );
      }
  
      private void assertSamePids( String[] pids )
      {
          assertEquals( "pid 1 didn't match pid 2", pids[0], pids[1] );
          assertEquals( "pid 1 didn't match pid 3", pids[0], pids[2] );
      }
  
      private void assertDifferentPids( String[] pids )
      {
          if ( pids[0].equals( pids[1] ) )
          {
              fail( "pid 1 matched pid 2: " + pids[0] );
          }
  
          if ( pids[0].equals( pids[2] ) )
          {
              fail( "pid 1 matched pid 3: " + pids[0] );
          }
 
         if ( pids[1].equals( pids[2] ) )
         {
             fail( "pid 2 matched pid 3: " + pids[0] );
         }
     }
 
     private String[] doTest( String forkMode )
         throws IOException, VerificationException
     {
         File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/fork-mode" );
 
         Verifier verifier = new Verifier( testDir.getAbsolutePath() );
         List<String> goals = this.getInitialGoals();
         goals.add( "test" );
         goals.add( "-DforkMode=" + forkMode );
         executeGoals( verifier, goals );
         verifier.verifyErrorFreeLog();
         verifier.resetStreams();
 
         HelperAssertions.assertTestSuiteResults( 3, 0, 0, 0, testDir );
 
         File targetDir = new File( testDir, "target" );
         String[] pids = new String[3];
         for ( int i = 1; i <= pids.length; i++ )
         {
             File pidFile = new File( targetDir, "test" + i + "-pid" );
             String pid = slurpFile( pidFile );
             pids[i - 1] = pid;
         }
         return pids;
     }
 
     private String slurpFile( File textFile )
         throws IOException
     {
         StringBuffer sb = new StringBuffer();
         BufferedReader reader = new BufferedReader( new FileReader( textFile ) );
         for ( String line = reader.readLine(); line != null; line = reader.readLine() )
         {
             sb.append( line );
         }
         reader.close();
         return sb.toString();
     }
 }