/*
 * #%L
 * Image processing operations for SciJava Ops.
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package org.scijava.ops.image.copy;

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

import org.scijava.ops.image.AbstractOpTest;
import net.imglib2.Cursor;
import net.imglib2.RandomAccess;
import net.imglib2.RandomAccessibleInterval;
import net.imglib2.img.Img;
import net.imglib2.img.array.ArrayImgFactory;
import net.imglib2.type.numeric.real.DoubleType;

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

/**
 * Test {@link CopyImg}.
 *
 * @author Tim-Oliver Buchholz (University of Konstanz)
 */
public class CopyImgTest extends AbstractOpTest {

	private Img<DoubleType> input;

	@BeforeEach
	public void createData() {
		input = new ArrayImgFactory<>(new DoubleType()).create(new int[] { 120,
			100 });

		final MersenneTwisterFast r = new MersenneTwisterFast(System
			.currentTimeMillis());

		final Cursor<DoubleType> inc = input.cursor();

		while (inc.hasNext()) {
			inc.next().set(r.nextDouble());
		}
	}

	@Test
	public void testCopyImgNoOutput() {
		final Img<DoubleType> inputCopy = input.factory().create(input, input
			.firstElement());
		copy(input, inputCopy);

		final RandomAccessibleInterval<DoubleType> output = ops.op("copy.img")
			.input(input).outType(new Nil<RandomAccessibleInterval<DoubleType>>()
			{}).apply();

		final Cursor<DoubleType> inc = input.localizingCursor();
		final RandomAccess<DoubleType> inCopyRA = inputCopy.randomAccess();
		final RandomAccess<DoubleType> outRA = output.randomAccess();

		while (inc.hasNext()) {
			inc.fwd();
			inCopyRA.setPosition(inc);
			outRA.setPosition(inc);
			assertEquals(inc.get().get(), outRA.get().get(), 0.0);
			assertEquals(inc.get().get(), inCopyRA.get().get(), 0.0);
		}
	}

	@Test
	public void testCopyImgWithOutput() {
		final Img<DoubleType> inputCopy = input.factory().create(input, input
			.firstElement());
		copy(input, inputCopy);

		final Img<DoubleType> output = input.factory().create(input, input
			.firstElement());

		ops.op("copy.img").input(input).output(output).compute();

		final Cursor<DoubleType> inc = input.cursor();
		final Cursor<DoubleType> inCopyc = inputCopy.cursor();
		final Cursor<DoubleType> outc = output.cursor();

		while (inc.hasNext()) {
			assertEquals(inc.next().get(), outc.next().get(), 0.0);
			assertEquals(inc.get().get(), inCopyc.next().get(), 0.0);
		}
	}

	private void copy(final Img<DoubleType> from, final Img<DoubleType> to) {
		final Cursor<DoubleType> fromc = from.cursor();
		final Cursor<DoubleType> toc = to.cursor();
		while (fromc.hasNext()) {
			toc.next().set(fromc.next().get());
		}
	}
}
