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/**
 * Copyright 2009 Ashley Williams
 * 
 * Licensed 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.
 */
package protoj.lang.command;

import joptsimple.ArgumentAcceptingOptionSpec;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import protoj.lang.Command;
import protoj.lang.CommandStore;
import protoj.lang.StandardProject;

/**
 * The command responsible for executing junit tests. The JunitBody instance
 * that implements the command functionality is added later on in the
 * StandardProject constructor.
 * 
 *  * Executes the junit tests in the project classes directory. The following
 * options are supported:
 * 
 * 1. -includes: the ant pattern describing the classes that should be executed
 * as junit tests.
 * 
 * 2. -excludes: the ant pattern describing the classes that should not be
 * executed as junit tests.
 * 
 * 3. If neither includes or excludes options are provided then the default
 * behavior applies, which is to execute all tests whose name includes 'Test'.
 * 
 * Example: jonny$ ./protoj.sh test
 * Example: jonny$ ./protoj.sh test -includes ++/MyTest.java
 * (would like to use astrix not +, but it breaks the javadocs)
 * 
 * 
 * @author Ashley Williams
 * 
 */
public final class JunitCommand {
	private final class Body implements Runnable {

		public void run() {
			Command delegate = getDelegate();
			OptionSet options = delegate.getOptions();
			String include = options.valueOf(includes);
			String exclude = options.valueOf(excludes);

			if (include == null && exclude == null) {
				project.getJunitFeature().junit();
			} else {
				project.getJunitFeature().junit(include, exclude);
			}
		}
	}

	/**
	 * Provides the basic command functionality.
	 */
	private Command delegate;
	private OptionSpec includes;
	private ArgumentAcceptingOptionSpec excludes;
	private final StandardProject project;

	public JunitCommand(StandardProject project) {
		this.project = project;
		CommandStore store = project.getCommandStore();
		delegate = store.addCommand("junit", "16m", new Body());
		delegate.initHelpResource("/protoj-common/language/english/junit.txt");
		delegate.initAliases("test");
		OptionParser parser = delegate.getParser();
		includes = parser.accepts(getIncludesOption()).withRequiredArg();
		excludes = parser.accepts(getExcludesOption()).withRequiredArg();
	}

	public String getExcludesOption() {
		return "excludes";
	}

	public String getIncludesOption() {
		return "includes";
	}

	public Command getDelegate() {
		return delegate;
	}

}