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

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

import org.scijava.ops.image.AbstractOpTest;

import org.joml.AxisAngle4d;
import org.joml.Quaterniond;
import org.joml.Quaterniondc;
import org.joml.Vector3d;
import org.junit.jupiter.api.Test;

/**
 * Tests for {@link Rotate3d}.
 *
 * @author Richard Domander (Royal Veterinary College, London)
 */
public class Rotate3dTest extends AbstractOpTest {

	private static final Quaterniondc IDENTITY = new Quaterniond(1, 0, 0, 0);

	@Test
	public void testAxisAngle() {
		final Vector3d xAxis = new Vector3d(1, 0, 0);
		final Vector3d in = new Vector3d(xAxis);
		final AxisAngle4d axisAngle = new AxisAngle4d(Math.PI / 2.0, 0, 0, 1);
		final Vector3d expected = xAxis.rotate(new Quaterniond(axisAngle));

		final Vector3d result = ops.op("linalg.rotate").input(in, axisAngle)
			.outType(Vector3d.class).apply();

		assertEquals(expected, result, "Rotation is incorrect");
	}

	@Test
	public void testCalculate() {
		final Vector3d xAxis = new Vector3d(1, 0, 0);
		final Vector3d in = new Vector3d(xAxis);

		final Vector3d result = ops.op("linalg.rotate").input(in, IDENTITY).outType(
			Vector3d.class).apply();

		assertNotSame(in, result, "Op should create a new object for output");
		assertEquals(xAxis, result, "Rotation is incorrect");
	}

	// TODO: X -> Inplace transformers
//	@Test
//	public void testMutate() {
//		final Vector3d xAxis = new Vector3d(1, 0, 0);
//		final Vector3d in = new Vector3d(xAxis);
//		final Quaterniond q = new Quaterniond(new AxisAngle4d(Math.PI / 2.0, 0, 0,
//			1));
//		final Vector3d expected = xAxis.rotate(q);
//
//		final Vector3d result = ops.linalg().rotate1(in, q);
//
//		assertSame("Mutate should operate on the input object", in, result);
//		assertEquals("Rotation is incorrect", expected, result);
//	}
}
