/*
 * Copyright 2013, 2014 Deutsche Nationalbibliothek
 *
 * 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 org.culturegraph.mf.flux;

import java.io.PrintStream;

import org.apache.commons.io.output.NullOutputStream;
import org.culturegraph.mf.flux.parser.FluxProgramm;
import org.junit.Test;

/**
 * Tests {@link FluxProgramm}
 *
 * @author markus geipel
 *
 */

public final class FluxProgrammTest {
	@Test
	public void testCommandRegistration() {
		// all commands must properly load to print the help
		FluxProgramm.printHelp(new PrintStream(new NullOutputStream()));

	}
}

/*
 * Copyright 2013, 2014 Deutsche Nationalbibliothek
 *
 * 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 org.culturegraph.mf.flux;

import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

import org.culturegraph.mf.flux.parser.FluxProgramm;
import org.junit.Test;

/**
 * Tests {@link FluxProgramm}
 *
 * @author markus geipel
 *
 */

public final class FluxProgrammTest {

	@Test
	public void testCommandRegistration() {
		// all commands must properly load to print the help
		FluxProgramm.printHelp(discardOutput());

	}

	private PrintStream discardOutput() {
		return new PrintStream(new OutputStream() {
			@Override
			public void write(int b) throws IOException {
				// Do not write any output.
			}
		});
	}

}

Replace NullOutputStream with inline implementation