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 * Java implementation of the SciJava Ops matching engine.
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 * Copyright (C) 2016 - 2024 SciJava developers.
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 * modification, are permitted provided that the following conditions are met:
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 *    this list of conditions and the following disclaimer.
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package org.scijava.ops.engine.matcher.impl;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.function.BiFunction;
import java.util.function.Function;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.scijava.ops.api.Hints;
import org.scijava.ops.engine.AbstractTestEnvironment;
import org.scijava.ops.engine.matcher.reduce.ReducedOpInfo;
import org.scijava.common3.Types;

public class OpDescriptionTest extends AbstractTestEnvironment {

	static class ClassOp implements BiFunction<Double, Double, Double> {

		@Override
		public Double apply(Double t, Double u) {
			return t + u;
		}
	}

	@Test
	public void testOpClassDescription() {
		DefaultOpClassInfo info = new DefaultOpClassInfo( //
			ClassOp.class, //
			"1.0", //
			"", //
			new Hints(), //
			1.0, //
			"test.classDescription" //
		);

		String expected =
			"org.scijava.ops.engine.matcher.impl.OpDescriptionTest$ClassOp\n\t" //
				+ "> input1 : java.lang.Double\n\t" //
				+ "> input2 : java.lang.Double\n\t" //
				+ "Returns : java.lang.Double";
		String actual = info.toString();
		Assertions.assertEquals(expected, actual);
	}

	public static Double methodOp(Double in1, Double in2) {
		return in1 + in2;
	}

	@Test
	public void testOpMethodDescription() throws NoSuchMethodException {
		Method method = OpDescriptionTest.class.getMethod("methodOp", Double.class,
			Double.class);
		DefaultOpMethodInfo info = new DefaultOpMethodInfo( //
			method, //
			BiFunction.class, //
			"1.0", //
			"", //
			new Hints(), //
			1.0, //
			"test.methodDescription" //
		);
		String expected =
			"org.scijava.ops.engine.matcher.impl.OpDescriptionTest.methodOp(java.lang.Double,java.lang.Double)\n\t" //
				+ "> input1 : java.lang.Double\n\t" //
				+ "> input2 : java.lang.Double\n\t" //
				+ "Returns : java.lang.Double";
		String actual = info.toString();
		Assertions.assertEquals(expected, actual);
	}

	public final BiFunction<Double, Double, Double> fieldOp = Double::sum;

	@Test
	public void testOpFieldDescription() throws NoSuchFieldException {
		Field field = OpDescriptionTest.class.getDeclaredField("fieldOp");
		DefaultOpFieldInfo info = new DefaultOpFieldInfo( //
			this, //
			field, //
			"", //
			"", //
			new Hints(), //
			1.0, //
			"test.fieldDescription" //
		);
		String expected =
			"org.scijava.ops.engine.matcher.impl.OpDescriptionTest$fieldOp\n\t" //
				+ "> input1 : java.lang.Double\n\t" //
				+ "> input2 : java.lang.Double\n\t" //
				+ "Returns : java.lang.Double";
		String actual = info.toString();
		Assertions.assertEquals(expected, actual);
	}

	@Test
	public void testReducedDescription() {
		DefaultOpClassInfo info = new DefaultOpClassInfo( //
			ClassOp.class, //
			"1.0", //
			"", //
			new Hints(), //
			1.0, //
			"test.reductionDescription" //
		);

		Type opType = Types.parameterize(Function.class, new Type[] { Double.class,
			Double.class });
		ReducedOpInfo reduced = new ReducedOpInfo(info, opType, 1);
		String expected =
			"org.scijava.ops.engine.matcher.impl.OpDescriptionTest$ClassOpReduction1\n\t" //
				+ "> input1 : java.lang.Double\n\t" //
				+ "Returns : java.lang.Double";
		String actual = reduced.toString();
		Assertions.assertEquals(expected, actual);
	}

}
