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 * Image processing operations for SciJava Ops.
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package org.scijava.ops.image.labeling;

import static org.junit.jupiter.api.Assertions.assertTrue;

import org.scijava.ops.image.AbstractOpTest;
import net.imglib2.FinalInterval;
import net.imglib2.RandomAccess;
import net.imglib2.img.Img;
import net.imglib2.roi.labeling.ImgLabeling;
import net.imglib2.roi.labeling.LabelingType;
import net.imglib2.type.logic.BitType;
import net.imglib2.type.numeric.integer.ByteType;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.scijava.types.Nil;

/**
 * Tests {@link MergeLabeling}.
 *
 * @author Stefan Helfrich (University of Konstanz)
 */
public class MergeLabelingTest extends AbstractOpTest {

	private ImgLabeling<Integer, ByteType> in1;
	private ImgLabeling<Integer, ByteType> in2;
	private ImgLabeling<Integer, ByteType> out;

	@BeforeEach
	public void setUp() {
		in1 = ops.op("create.imgLabeling").input(new FinalInterval(2, 2),
			new ByteType()).outType(new Nil<ImgLabeling<Integer, ByteType>>()
		{}).apply();
		RandomAccess<LabelingType<Integer>> randomAccess = in1.randomAccess();
		randomAccess.setPosition(new int[] { 0, 0 });
		randomAccess.get().add(0);
		randomAccess.setPosition(new int[] { 0, 1 });
		randomAccess.get().add(1);
		randomAccess.setPosition(new int[] { 1, 0 });
		randomAccess.get().add(2);
		randomAccess.setPosition(new int[] { 1, 1 });
		randomAccess.get().add(3);

		in2 = ops.op("create.imgLabeling").input(new FinalInterval(2, 2),
			new ByteType()).outType(new Nil<ImgLabeling<Integer, ByteType>>()
		{}).apply();
		randomAccess = in2.randomAccess();
		randomAccess.setPosition(new int[] { 0, 0 });
		randomAccess.get().add(10);
		randomAccess.setPosition(new int[] { 0, 1 });
		randomAccess.get().add(11);
		randomAccess.setPosition(new int[] { 1, 0 });
		randomAccess.get().add(12);
		randomAccess.setPosition(new int[] { 1, 1 });
		randomAccess.get().add(13);

		out = ops.op("create.imgLabeling").input(new FinalInterval(2, 2),
			new ByteType()).outType(new Nil<ImgLabeling<Integer, ByteType>>()
		{}).apply();
	}

	@Test
	public void testMerging() {
		final ImgLabeling<Integer, ByteType> run = ops.op("labeling.merge").input(
			in1, in2).outType(new Nil<ImgLabeling<Integer, ByteType>>()
		{}).apply();
		assertTrue(run.firstElement().contains(0));
		assertTrue(run.firstElement().contains(10));
		assertTrue(!run.firstElement().contains(3));
	}

	@Test
	public void testMask() {
		final Img<BitType> mask = ops.op("create.img").input(in1, new BitType())
			.outType(new Nil<Img<BitType>>()
			{}).apply();
		final RandomAccess<BitType> maskRA = mask.randomAccess();
		maskRA.setPosition(new int[] { 0, 0 });
		maskRA.get().set(true);
		maskRA.setPosition(new int[] { 1, 1 });
		maskRA.get().set(true);
		out = ops.op("labeling.merge").input(in1, in2, mask).outType(
			new Nil<ImgLabeling<Integer, ByteType>>()
			{}).apply();
		final RandomAccess<LabelingType<Integer>> outRA = out.randomAccess();
		outRA.setPosition(new int[] { 0, 0 });
		assertTrue(outRA.get().contains(0));
		assertTrue(outRA.get().contains(10));
		outRA.setPosition(new int[] { 0, 1 });
		assertTrue(outRA.get().isEmpty());
	}

}
