src/main/java/org/apache/maven/plugin/compiler/TestCompilerMojo.java - maven-compiler-plugin - Git at Google

 package org.apache.maven.plugin.compiler;

 /*
  * 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.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;

 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugins.annotations.LifecyclePhase;
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.annotations.ResolutionScope;
 import org.apache.maven.toolchain.Toolchain;
 import org.apache.maven.toolchain.java.DefaultJavaToolChain;
 import org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
 import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
 import org.codehaus.plexus.compiler.util.scan.StaleSourceScanner;
 import org.codehaus.plexus.languages.java.jpms.JavaModuleDescriptor;
 import org.codehaus.plexus.languages.java.jpms.LocationManager;
 import org.codehaus.plexus.languages.java.jpms.ResolvePathsRequest;
 import org.codehaus.plexus.languages.java.jpms.ResolvePathsResult;

 /**
  * Compiles application test sources.
  *
  * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
  * @since 2.0
  */
 @Mojo( name = "testCompile", defaultPhase = LifecyclePhase.TEST_COMPILE, threadSafe = true,
                 requiresDependencyResolution = ResolutionScope.TEST )
 public class TestCompilerMojo
     extends AbstractCompilerMojo
 {
     /**
      * Set this to 'true' to bypass compilation of test sources.
      * Its use is NOT RECOMMENDED, but quite convenient on occasion.
      */
     @Parameter ( property = "maven.test.skip" )
     private boolean skip;

     /**
      * The source directories containing the test-source to be compiled.
      */
     @Parameter ( defaultValue = "${project.testCompileSourceRoots}", readonly = true, required = true )
     private List<String> compileSourceRoots;

     /**
      * The directory where compiled test classes go.
      */
     @Parameter ( defaultValue = "${project.build.testOutputDirectory}", required = true, readonly = true )
     private File outputDirectory;

     /**
      * A list of inclusion filters for the compiler.
      */
     @Parameter
     private Set<String> testIncludes = new HashSet<>();

     /**
      * A list of exclusion filters for the compiler.
      */
     @Parameter
     private Set<String> testExcludes = new HashSet<>();

     /**
      * The -source argument for the test Java compiler.
      *
      * @since 2.1
      */
     @Parameter ( property = "maven.compiler.testSource" )
     private String testSource;

     /**
      * The -target argument for the test Java compiler.
      *
      * @since 2.1
      */
     @Parameter ( property = "maven.compiler.testTarget" )
     private String testTarget;

     /**
      * the -release argument for the test Java compiler
      *
      * @since 3.6
      */
     @Parameter ( property = "maven.compiler.testRelease" )
     private String testRelease;

     /**
      * <p>
      * Sets the arguments to be passed to test compiler (prepending a dash) if fork is set to true.
      * </p>
      * <p>
      * This is because the list of valid arguments passed to a Java compiler
      * varies based on the compiler version.
      * </p>
      *
      * @since 2.1
      */
     @Parameter
     private Map<String, String> testCompilerArguments;

     /**
      * <p>
      * Sets the unformatted argument string to be passed to test compiler if fork is set to true.
      * </p>
      * <p>
      * This is because the list of valid arguments passed to a Java compiler
      * varies based on the compiler version.
      * </p>
      *
      * @since 2.1
      */
     @Parameter
     private String testCompilerArgument;

     /**
      * <p>
      * Specify where to place generated source files created by annotation processing.
      * Only applies to JDK 1.6+
      * </p>
      *
      * @since 2.2
      */
     @Parameter ( defaultValue = "${project.build.directory}/generated-test-sources/test-annotations" )
     private File generatedTestSourcesDirectory;

     @Parameter( defaultValue = "${project.testClasspathElements}", readonly = true )
     private List<String> testPath;


     /**
      * when forking and debug activated the commandline used will be dumped in this file
      * @since 3.10.0
      */
     @Parameter( defaultValue = "javac-test" )
     private String debugFileName;

     final LocationManager locationManager = new LocationManager();

     private Map<String, JavaModuleDescriptor> pathElements;

     private Collection<String> classpathElements;

     private Collection<String> modulepathElements;

     public void execute()
         throws MojoExecutionException, CompilationFailureException
     {
         if ( skip )
         {
             getLog().info( "Not compiling test sources" );
             return;
         }
         super.execute();
     }

     protected List<String> getCompileSourceRoots()
     {
         return compileSourceRoots;
     }

     @Override
     protected Map<String, JavaModuleDescriptor> getPathElements()
     {
         return pathElements;
     }

     protected List<String> getClasspathElements()
     {
         return new ArrayList<>( classpathElements );
     }

     @Override
     protected List<String> getModulepathElements()
     {
         return new ArrayList<>( modulepathElements );
     }

     protected File getOutputDirectory()
     {
         return outputDirectory;
     }

     @Override
     protected void preparePaths( Set<File> sourceFiles )
     {
         File mainOutputDirectory = new File( getProject().getBuild().getOutputDirectory() );

         File mainModuleDescriptorClassFile = new File( mainOutputDirectory, "module-info.class" );
         JavaModuleDescriptor mainModuleDescriptor = null;

         File testModuleDescriptorJavaFile = new File( "module-info.java" );
         JavaModuleDescriptor testModuleDescriptor = null;

         // Go through the source files to respect includes/excludes
         for ( File sourceFile : sourceFiles )
         {
             // @todo verify if it is the root of a sourcedirectory?
             if ( "module-info.java".equals( sourceFile.getName() ) )
             {
                 testModuleDescriptorJavaFile = sourceFile;
                 break;
             }
         }

         // Get additional information from the main module descriptor, if available
         if ( mainModuleDescriptorClassFile.exists() )
         {
             ResolvePathsResult<String> result;

             try
             {
                 ResolvePathsRequest<String> request =
                         ResolvePathsRequest.ofStrings( testPath )
                                 .setIncludeStatic( true )
                                 .setMainModuleDescriptor( mainModuleDescriptorClassFile.getAbsolutePath() );

                 Toolchain toolchain = getToolchain();
                 if ( toolchain instanceof DefaultJavaToolChain )
                 {
                     request.setJdkHome( ( (DefaultJavaToolChain) toolchain ).getJavaHome() );
                 }

                 result = locationManager.resolvePaths( request );

                 for ( Entry<String, Exception> pathException : result.getPathExceptions().entrySet() )
                 {
                     Throwable cause = pathException.getValue();
                     while ( cause.getCause() != null )
                     {
                         cause = cause.getCause();
                     }
                     String fileName = Paths.get( pathException.getKey() ).getFileName().toString();
                     getLog().warn( "Can't extract module name from " + fileName + ": " + cause.getMessage() );
                 }
             }
             catch ( IOException e )
             {
                 throw new RuntimeException( e );
             }

             mainModuleDescriptor = result.getMainModuleDescriptor();

             pathElements = new LinkedHashMap<>( result.getPathElements().size() );
             pathElements.putAll( result.getPathElements() );

             modulepathElements = result.getModulepathElements().keySet();
             classpathElements = result.getClasspathElements();
         }

         // Get additional information from the test module descriptor, if available
         if ( testModuleDescriptorJavaFile.exists() )
         {
             ResolvePathsResult<String> result;

             try
             {
                 ResolvePathsRequest<String> request =
                         ResolvePathsRequest.ofStrings( testPath )
                                 .setMainModuleDescriptor( testModuleDescriptorJavaFile.getAbsolutePath() );

                 Toolchain toolchain = getToolchain();
                 if ( toolchain instanceof DefaultJavaToolChain )
                 {
                     request.setJdkHome( ( (DefaultJavaToolChain) toolchain ).getJavaHome() );
                 }

                 result = locationManager.resolvePaths( request );
             }
             catch ( IOException e )
             {
                 throw new RuntimeException( e );
             }

             testModuleDescriptor = result.getMainModuleDescriptor();
         }

         if ( release != null )
         {
             if ( Integer.valueOf( release ) < 9 )
             {
                 pathElements = Collections.emptyMap();
                 modulepathElements = Collections.emptyList();
                 classpathElements = testPath;
                 return;
             }
         }
         else if ( Double.valueOf( getTarget() ) < Double.valueOf( MODULE_INFO_TARGET ) )
         {
             pathElements = Collections.emptyMap();
             modulepathElements = Collections.emptyList();
             classpathElements = testPath;
             return;
         }

         if ( testModuleDescriptor != null )
         {
             modulepathElements = testPath;
             classpathElements = Collections.emptyList();

             if ( mainModuleDescriptor != null )
             {
                 if ( getLog().isDebugEnabled() )
                 {
                     getLog().debug( "Main and test module descriptors exist:" );
                     getLog().debug( "  main module = " + mainModuleDescriptor.name() );
                     getLog().debug( "  test module = " + testModuleDescriptor.name() );
                 }

                 if ( testModuleDescriptor.name().equals( mainModuleDescriptor.name() ) )
                 {
                     if ( compilerArgs == null )
                     {
                         compilerArgs = new ArrayList<>();
                     }
                     compilerArgs.add( "--patch-module" );

                     StringBuilder patchModuleValue = new StringBuilder();
                     patchModuleValue.append( testModuleDescriptor.name() );
                     patchModuleValue.append( '=' );

                     for ( String root : getProject().getCompileSourceRoots() )
                     {
                         if ( Files.exists( Paths.get( root ) ) )
                         {
                             patchModuleValue.append( root ).append( PS );
                         }
                     }

                     compilerArgs.add( patchModuleValue.toString() );
                 }
                 else
                 {
                     getLog().debug( "Black-box testing - all is ready to compile" );
                 }
             }
             else
             {
                 // No main binaries available? Means we're a test-only project.
                 if ( !mainOutputDirectory.exists() )
                 {
                     return;
                 }
                 // very odd
                 // Means that main sources must be compiled with -modulesource and -Xmodule:<moduleName>
                 // However, this has a huge impact since you can't simply use it as a classpathEntry
                 // due to extra folder in between
                 throw new UnsupportedOperationException( "Can't compile test sources "
                     + "when main sources are missing a module descriptor" );
             }
         }
         else
         {
             if ( mainModuleDescriptor != null )
             {
                 if ( compilerArgs == null )
                 {
                     compilerArgs = new ArrayList<>();
                 }
                 compilerArgs.add( "--patch-module" );

                 StringBuilder patchModuleValue = new StringBuilder( mainModuleDescriptor.name() )
                                 .append( '=' )
                                 .append( mainOutputDirectory )
                                 .append( PS );
                 for ( String root : compileSourceRoots )
                 {
                     patchModuleValue.append( root ).append( PS );
                 }

                 compilerArgs.add( patchModuleValue.toString() );

                 compilerArgs.add( "--add-reads" );
                 compilerArgs.add( mainModuleDescriptor.name() + "=ALL-UNNAMED" );
             }
             else
             {
                 modulepathElements = Collections.emptyList();
                 classpathElements = testPath;
             }
         }
     }

     protected SourceInclusionScanner getSourceInclusionScanner( int staleMillis )
     {
         SourceInclusionScanner scanner;

         if ( testIncludes.isEmpty() && testExcludes.isEmpty() )
         {
             scanner = new StaleSourceScanner( staleMillis );
         }
         else
         {
             if ( testIncludes.isEmpty() )
             {
                 testIncludes.add( "**/*.java" );
             }
             scanner = new StaleSourceScanner( staleMillis, testIncludes, testExcludes );
         }

         return scanner;
     }

     protected SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding )
     {
         SourceInclusionScanner scanner;

         // it's not defined if we get the ending with or without the dot '.'
         String defaultIncludePattern = "**/*" + ( inputFileEnding.startsWith( "." ) ? "" : "." ) + inputFileEnding;

         if ( testIncludes.isEmpty() && testExcludes.isEmpty() )
         {
             testIncludes = Collections.singleton( defaultIncludePattern );
             scanner = new SimpleSourceInclusionScanner( testIncludes, Collections.<String>emptySet() );
         }
         else
         {
             if ( testIncludes.isEmpty() )
             {
                 testIncludes.add( defaultIncludePattern );
             }
             scanner = new SimpleSourceInclusionScanner( testIncludes, testExcludes );
         }

         return scanner;
     }

     protected String getSource()
     {
         return testSource == null ? source : testSource;
     }

     protected String getTarget()
     {
         return testTarget == null ? target : testTarget;
     }

     @Override
     protected String getRelease()
     {
         return testRelease == null ? release : testRelease;
     }

     protected String getCompilerArgument()
     {
         return testCompilerArgument == null ? compilerArgument : testCompilerArgument;
     }

     protected Map<String, String> getCompilerArguments()
     {
         return testCompilerArguments == null ? compilerArguments : testCompilerArguments;
     }

     protected File getGeneratedSourcesDirectory()
     {
         return generatedTestSourcesDirectory;
     }

     @Override
     protected String getDebugFileName()
     {
         return debugFileName;
     }

     @Override
     protected boolean isTestCompile()
     {
         return true;
     }

     @Override
     protected Set<String> getIncludes()
     {
         return testIncludes;
     }

     @Override
     protected Set<String> getExcludes()
     {
         return testExcludes;
     }

 }
	package org.apache.maven.plugin.compiler;

	/*
	* 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.io.File;
	import java.io.IOException;
	import java.nio.file.Files;
	import java.nio.file.Paths;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.HashSet;
	import java.util.LinkedHashMap;
	import java.util.List;
	import java.util.Map;
	import java.util.Map.Entry;
	import java.util.Set;

	import org.apache.maven.plugin.MojoExecutionException;
	import org.apache.maven.plugins.annotations.LifecyclePhase;
	import org.apache.maven.plugins.annotations.Mojo;
	import org.apache.maven.plugins.annotations.Parameter;
	import org.apache.maven.plugins.annotations.ResolutionScope;
	import org.apache.maven.toolchain.Toolchain;
	import org.apache.maven.toolchain.java.DefaultJavaToolChain;
	import org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
	import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
	import org.codehaus.plexus.compiler.util.scan.StaleSourceScanner;
	import org.codehaus.plexus.languages.java.jpms.JavaModuleDescriptor;
	import org.codehaus.plexus.languages.java.jpms.LocationManager;
	import org.codehaus.plexus.languages.java.jpms.ResolvePathsRequest;
	import org.codehaus.plexus.languages.java.jpms.ResolvePathsResult;

	/**
	* Compiles application test sources.
	*
	* @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
	* @since 2.0
	*/
	@Mojo( name = "testCompile", defaultPhase = LifecyclePhase.TEST_COMPILE, threadSafe = true,
	requiresDependencyResolution = ResolutionScope.TEST )
	public class TestCompilerMojo
	extends AbstractCompilerMojo
	{
	/**
	* Set this to 'true' to bypass compilation of test sources.
	* Its use is NOT RECOMMENDED, but quite convenient on occasion.
	*/
	@Parameter ( property = "maven.test.skip" )
	private boolean skip;

	/**
	* The source directories containing the test-source to be compiled.
	*/
	@Parameter ( defaultValue = "${project.testCompileSourceRoots}", readonly = true, required = true )
	private List<String> compileSourceRoots;

	/**
	* The directory where compiled test classes go.
	*/
	@Parameter ( defaultValue = "${project.build.testOutputDirectory}", required = true, readonly = true )
	private File outputDirectory;

	/**
	* A list of inclusion filters for the compiler.
	*/
	@Parameter
	private Set<String> testIncludes = new HashSet<>();

	/**
	* A list of exclusion filters for the compiler.
	*/
	@Parameter
	private Set<String> testExcludes = new HashSet<>();

	/**
	* The -source argument for the test Java compiler.
	*
	* @since 2.1
	*/
	@Parameter ( property = "maven.compiler.testSource" )
	private String testSource;

	/**
	* The -target argument for the test Java compiler.
	*
	* @since 2.1
	*/
	@Parameter ( property = "maven.compiler.testTarget" )
	private String testTarget;

	/**
	* the -release argument for the test Java compiler
	*
	* @since 3.6
	*/
	@Parameter ( property = "maven.compiler.testRelease" )
	private String testRelease;

	/**
	* <p>
	* Sets the arguments to be passed to test compiler (prepending a dash) if fork is set to true.
	* </p>
	* <p>
	* This is because the list of valid arguments passed to a Java compiler
	* varies based on the compiler version.
	* </p>
	*
	* @since 2.1
	*/
	@Parameter
	private Map<String, String> testCompilerArguments;

	/**
	* <p>
	* Sets the unformatted argument string to be passed to test compiler if fork is set to true.
	* </p>
	* <p>
	* This is because the list of valid arguments passed to a Java compiler
	* varies based on the compiler version.
	* </p>
	*
	* @since 2.1
	*/
	@Parameter
	private String testCompilerArgument;

	/**
	* <p>
	* Specify where to place generated source files created by annotation processing.
	* Only applies to JDK 1.6+
	* </p>
	*
	* @since 2.2
	*/
	@Parameter ( defaultValue = "${project.build.directory}/generated-test-sources/test-annotations" )
	private File generatedTestSourcesDirectory;

	@Parameter( defaultValue = "${project.testClasspathElements}", readonly = true )
	private List<String> testPath;


	/**
	* when forking and debug activated the commandline used will be dumped in this file
	* @since 3.10.0
	*/
	@Parameter( defaultValue = "javac-test" )
	private String debugFileName;

	final LocationManager locationManager = new LocationManager();

	private Map<String, JavaModuleDescriptor> pathElements;

	private Collection<String> classpathElements;

	private Collection<String> modulepathElements;

	public void execute()
	throws MojoExecutionException, CompilationFailureException
	{
	if ( skip )
	{
	getLog().info( "Not compiling test sources" );
	return;
	}
	super.execute();
	}

	protected List<String> getCompileSourceRoots()
	{
	return compileSourceRoots;
	}

	@Override
	protected Map<String, JavaModuleDescriptor> getPathElements()
	{
	return pathElements;
	}

	protected List<String> getClasspathElements()
	{
	return new ArrayList<>( classpathElements );
	}

	@Override
	protected List<String> getModulepathElements()
	{
	return new ArrayList<>( modulepathElements );
	}

	protected File getOutputDirectory()
	{
	return outputDirectory;
	}

	@Override
	protected void preparePaths( Set<File> sourceFiles )
	{
	File mainOutputDirectory = new File( getProject().getBuild().getOutputDirectory() );

	File mainModuleDescriptorClassFile = new File( mainOutputDirectory, "module-info.class" );
	JavaModuleDescriptor mainModuleDescriptor = null;

	File testModuleDescriptorJavaFile = new File( "module-info.java" );
	JavaModuleDescriptor testModuleDescriptor = null;

	// Go through the source files to respect includes/excludes
	for ( File sourceFile : sourceFiles )
	{
	// @todo verify if it is the root of a sourcedirectory?
	if ( "module-info.java".equals( sourceFile.getName() ) )
	{
	testModuleDescriptorJavaFile = sourceFile;
	break;
	}
	}

	// Get additional information from the main module descriptor, if available
	if ( mainModuleDescriptorClassFile.exists() )
	{
	ResolvePathsResult<String> result;

	try
	{
	ResolvePathsRequest<String> request =
	ResolvePathsRequest.ofStrings( testPath )
	.setIncludeStatic( true )
	.setMainModuleDescriptor( mainModuleDescriptorClassFile.getAbsolutePath() );

	Toolchain toolchain = getToolchain();
	if ( toolchain instanceof DefaultJavaToolChain )
	{
	request.setJdkHome( ( (DefaultJavaToolChain) toolchain ).getJavaHome() );
	}

	result = locationManager.resolvePaths( request );

	for ( Entry<String, Exception> pathException : result.getPathExceptions().entrySet() )
	{
	Throwable cause = pathException.getValue();
	while ( cause.getCause() != null )
	{
	cause = cause.getCause();
	}
	String fileName = Paths.get( pathException.getKey() ).getFileName().toString();
	getLog().warn( "Can't extract module name from " + fileName + ": " + cause.getMessage() );
	}
	}
	catch ( IOException e )
	{
	throw new RuntimeException( e );
	}

	mainModuleDescriptor = result.getMainModuleDescriptor();

	pathElements = new LinkedHashMap<>( result.getPathElements().size() );
	pathElements.putAll( result.getPathElements() );

	modulepathElements = result.getModulepathElements().keySet();
	classpathElements = result.getClasspathElements();
	}

	// Get additional information from the test module descriptor, if available
	if ( testModuleDescriptorJavaFile.exists() )
	{
	ResolvePathsResult<String> result;

	try
	{
	ResolvePathsRequest<String> request =
	ResolvePathsRequest.ofStrings( testPath )
	.setMainModuleDescriptor( testModuleDescriptorJavaFile.getAbsolutePath() );

	Toolchain toolchain = getToolchain();
	if ( toolchain instanceof DefaultJavaToolChain )
	{
	request.setJdkHome( ( (DefaultJavaToolChain) toolchain ).getJavaHome() );
	}

	result = locationManager.resolvePaths( request );
	}
	catch ( IOException e )
	{
	throw new RuntimeException( e );
	}

	testModuleDescriptor = result.getMainModuleDescriptor();
	}

	if ( release != null )
	{
	if ( Integer.valueOf( release ) < 9 )
	{
	pathElements = Collections.emptyMap();
	modulepathElements = Collections.emptyList();
	classpathElements = testPath;
	return;
	}
	}
	else if ( Double.valueOf( getTarget() ) < Double.valueOf( MODULE_INFO_TARGET ) )
	{
	pathElements = Collections.emptyMap();
	modulepathElements = Collections.emptyList();
	classpathElements = testPath;
	return;
	}

	if ( testModuleDescriptor != null )
	{
	modulepathElements = testPath;
	classpathElements = Collections.emptyList();

	if ( mainModuleDescriptor != null )
	{
	if ( getLog().isDebugEnabled() )
	{
	getLog().debug( "Main and test module descriptors exist:" );
	getLog().debug( " main module = " + mainModuleDescriptor.name() );
	getLog().debug( " test module = " + testModuleDescriptor.name() );
	}

	if ( testModuleDescriptor.name().equals( mainModuleDescriptor.name() ) )
	{
	if ( compilerArgs == null )
	{
	compilerArgs = new ArrayList<>();
	}
	compilerArgs.add( "--patch-module" );

	StringBuilder patchModuleValue = new StringBuilder();
	patchModuleValue.append( testModuleDescriptor.name() );
	patchModuleValue.append( '=' );

	for ( String root : getProject().getCompileSourceRoots() )
	{
	if ( Files.exists( Paths.get( root ) ) )
	{
	patchModuleValue.append( root ).append( PS );
	}
	}

	compilerArgs.add( patchModuleValue.toString() );
	}
	else
	{
	getLog().debug( "Black-box testing - all is ready to compile" );
	}
	}
	else
	{
	// No main binaries available? Means we're a test-only project.
	if ( !mainOutputDirectory.exists() )
	{
	return;
	}
	// very odd
	// Means that main sources must be compiled with -modulesource and -Xmodule:<moduleName>
	// However, this has a huge impact since you can't simply use it as a classpathEntry
	// due to extra folder in between
	throw new UnsupportedOperationException( "Can't compile test sources "
	+ "when main sources are missing a module descriptor" );
	}
	}
	else
	{
	if ( mainModuleDescriptor != null )
	{
	if ( compilerArgs == null )
	{
	compilerArgs = new ArrayList<>();
	}
	compilerArgs.add( "--patch-module" );

	StringBuilder patchModuleValue = new StringBuilder( mainModuleDescriptor.name() )
	.append( '=' )
	.append( mainOutputDirectory )
	.append( PS );
	for ( String root : compileSourceRoots )
	{
	patchModuleValue.append( root ).append( PS );
	}

	compilerArgs.add( patchModuleValue.toString() );

	compilerArgs.add( "--add-reads" );
	compilerArgs.add( mainModuleDescriptor.name() + "=ALL-UNNAMED" );
	}
	else
	{
	modulepathElements = Collections.emptyList();
	classpathElements = testPath;
	}
	}
	}

	protected SourceInclusionScanner getSourceInclusionScanner( int staleMillis )
	{
	SourceInclusionScanner scanner;

	if ( testIncludes.isEmpty() && testExcludes.isEmpty() )
	{
	scanner = new StaleSourceScanner( staleMillis );
	}
	else
	{
	if ( testIncludes.isEmpty() )
	{
	testIncludes.add( "*/.java" );
	}
	scanner = new StaleSourceScanner( staleMillis, testIncludes, testExcludes );
	}

	return scanner;
	}

	protected SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding )
	{
	SourceInclusionScanner scanner;

	// it's not defined if we get the ending with or without the dot '.'
	String defaultIncludePattern = "*/" + ( inputFileEnding.startsWith( "." ) ? "" : "." ) + inputFileEnding;

	if ( testIncludes.isEmpty() && testExcludes.isEmpty() )
	{
	testIncludes = Collections.singleton( defaultIncludePattern );
	scanner = new SimpleSourceInclusionScanner( testIncludes, Collections.<String>emptySet() );
	}
	else
	{
	if ( testIncludes.isEmpty() )
	{
	testIncludes.add( defaultIncludePattern );
	}
	scanner = new SimpleSourceInclusionScanner( testIncludes, testExcludes );
	}

	return scanner;
	}

	protected String getSource()
	{
	return testSource == null ? source : testSource;
	}

	protected String getTarget()
	{
	return testTarget == null ? target : testTarget;
	}

	@Override
	protected String getRelease()
	{
	return testRelease == null ? release : testRelease;
	}

	protected String getCompilerArgument()
	{
	return testCompilerArgument == null ? compilerArgument : testCompilerArgument;
	}

	protected Map<String, String> getCompilerArguments()
	{
	return testCompilerArguments == null ? compilerArguments : testCompilerArguments;
	}

	protected File getGeneratedSourcesDirectory()
	{
	return generatedTestSourcesDirectory;
	}

	@Override
	protected String getDebugFileName()
	{
	return debugFileName;
	}

	@Override
	protected boolean isTestCompile()
	{
	return true;
	}

	@Override
	protected Set<String> getIncludes()
	{
	return testIncludes;
	}

	@Override
	protected Set<String> getExcludes()
	{
	return testExcludes;
	}

	}