package org.apache.maven.tools.plugin.scanner;
   
   /*
    * 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.model.Build;
  import org.apache.maven.model.Model;
  import org.apache.maven.plugin.descriptor.InvalidPluginDescriptorException;
  import org.apache.maven.plugin.descriptor.MojoDescriptor;
  import org.apache.maven.plugin.descriptor.PluginDescriptor;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.tools.plugin.DefaultPluginToolsRequest;
  import org.apache.maven.tools.plugin.extractor.ExtractionException;
  import org.apache.maven.tools.plugin.extractor.MojoDescriptorExtractor;
  import org.junit.Before;
  import org.junit.Test;
  
  import java.io.File;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  /**
   * @author jdcasey
   */
  public class DefaultMojoScannerTest
  {
      private Map<String, MojoDescriptorExtractor> extractors;
  
      private Build build;
  
      private Model model;
  
      private MojoScanner scanner;
  
      private MavenProject project;
  
      @Before
      public void setUp()
      {
          extractors = new HashMap<>();
          extractors.put( "one", new ScannerTestExtractor( "one" ) );
          extractors.put( "two", new ScannerTestExtractor( "two" ) );
          extractors.put( "three", new ScannerTestExtractor( "three" ) );
  
          scanner = new DefaultMojoScanner( extractors );
  
          build = new Build();
          build.setSourceDirectory( "testdir" );
  
          model = new Model();
          model.setBuild( build );
  
          project = new MavenProject( model );
          project.setFile( new File( "." ) );
      }
  
      @Test
      public void testUnspecifiedExtractors()
          throws Exception
      {
          PluginDescriptor pluginDescriptor = createPluginDescriptor();
  
          scanner.populatePluginDescriptor( new DefaultPluginToolsRequest( project, pluginDescriptor ) );
  
          checkResult( pluginDescriptor, extractors.keySet() );
      }
  
      @Test
      public void testSpecifiedExtractors()
          throws Exception
      {
          Set<String> activeExtractors = new HashSet<>();
          activeExtractors.add( "one" );
         activeExtractors.add( "" );
         activeExtractors.add( null );
         activeExtractors.add( "three" );
 
         PluginDescriptor pluginDescriptor = createPluginDescriptor();
 
         scanner.setActiveExtractors( activeExtractors );
         scanner.populatePluginDescriptor( new DefaultPluginToolsRequest( project, pluginDescriptor ) );
 
         checkResult( pluginDescriptor, Arrays.asList( "one", "three" ) );
     }
 
     @Test
     public void testAllExtractorsThroughNull()
         throws Exception
     {
         PluginDescriptor pluginDescriptor = createPluginDescriptor();
 
         scanner.setActiveExtractors( null );
         scanner.populatePluginDescriptor( new DefaultPluginToolsRequest( project, pluginDescriptor ) );
 
         checkResult( pluginDescriptor, extractors.keySet() );
     }
 
     @Test
     public void testNoExtractorsThroughEmptySet()
         throws Exception
     {
         PluginDescriptor pluginDescriptor = createPluginDescriptor();
 
         scanner.setActiveExtractors( Collections.<String>emptySet() );
         try
         {
             scanner.populatePluginDescriptor( new DefaultPluginToolsRequest( project, pluginDescriptor ) );
             fail( "Expected exception" );
         }
         catch (InvalidPluginDescriptorException e)
         {
             // Ok
         }
 
         checkResult( pluginDescriptor, Collections.<String>emptySet() );
     }
 
     @Test
     public void testUnknownExtractor()
         throws Exception
     {
         Set<String> activeExtractors = new HashSet<>();
         activeExtractors.add( "four" );
 
         PluginDescriptor pluginDescriptor = createPluginDescriptor();
 
         scanner.setActiveExtractors( activeExtractors );
 
         try
         {
             scanner.populatePluginDescriptor( new DefaultPluginToolsRequest( project, pluginDescriptor ) );
             fail( "No error for unknown extractor" );
         }
         catch ( ExtractionException e )
         {
             // Ok
         }
 
         checkResult( pluginDescriptor, Collections.<String>emptySet() );
     }
 
     private PluginDescriptor createPluginDescriptor()
     {
         PluginDescriptor pluginDescriptor = new PluginDescriptor();
         pluginDescriptor.setGroupId( "groupId" );
         pluginDescriptor.setArtifactId( "artifactId" );
         pluginDescriptor.setVersion( "version" );
         pluginDescriptor.setGoalPrefix( "testId" );
         return pluginDescriptor;
     }
 
     /**
      * Checks if the {@link PluginDescriptor} contains exactly the {@link MojoDescriptor}s with the
      * supplied goal names.
      *
      * @param pluginDescriptor The {@link PluginDescriptor} to check.
      * @param expectedGoals    The goal names of the {@link MojoDescriptor}s.
      */
     protected void checkResult( PluginDescriptor pluginDescriptor, Collection<String> expectedGoals )
     {
         Set<String> remainingGoals = new HashSet<>( expectedGoals );
         List<MojoDescriptor> descriptors = pluginDescriptor.getMojos();
 
         if ( descriptors == null )
         {
             // TODO Maybe getMojos should be more user friendly and not return null
             descriptors = Collections.emptyList();
         }
 
         for ( MojoDescriptor desc : descriptors )
         {
             assertEquals( pluginDescriptor, desc.getPluginDescriptor() );
             assertTrue( "Unexpected goal in PluginDescriptor: " + desc.getGoal(),
                     remainingGoals.remove( desc.getGoal() ) );
         }
 
         assertEquals( "Expected goals missing from PluginDescriptor: " + remainingGoals, 0, remainingGoals.size() );
     }
 
 }