/*
 * #%L
 * ImageJ software for multidimensional image processing and analysis.
 * %%
 * Copyright (C) 2014 - 2016 Board of Regents of the University of
 * Wisconsin-Madison, University of Konstanz and Brian Northan.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

package net.imagej.ops;

import static org.junit.Assert.assertEquals;

import java.util.concurrent.ExecutionException;

import org.junit.Test;
import org.scijava.ItemIO;
import org.scijava.command.Command;
import org.scijava.command.CommandModule;
import org.scijava.command.CommandService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;

/**
 * Tests that {@link Op}s can be executed directly as {@link Command}s.
 *
 * @author Curtis Rueden
 */
public class RunningOpAsCommandTest extends AbstractOpTest {

	@Test
	public void testRunCommand() throws InterruptedException, ExecutionException {
		final CommandService cs = context.service(CommandService.class);
		final CommandModule module = cs.run(Fibonacci.class, true, "n", 7).get();
		final int result = (Integer) module.getOutput("result");
		assertEquals(13, result);
	}

	// -- Helper classes --

	@Plugin(type = Op.class)
	public static class Fibonacci extends AbstractOp {

		@Parameter
		private int n;

		@Parameter(type = ItemIO.OUTPUT)
		private int result;

		@Override
		public void run() {
			result = fibonacci(n);
		}

		private int fibonacci(final int k) {
			if (k == 1 || k == 2) return 1;
			// NB: Gratuitous use of math.add ensures the OpEnvironment is non-null!
			return ops().math().add(fibonacci(k - 1), fibonacci(k - 2));
		}
	}

}

Add test verifying that ops can be run as commands