/*
 * Copyright (c) 2011 University of Tartu
 * All rights reserved.
 *
 * 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.
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * 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 HOLDER OR CONTRIBUTORS BE LIABLE FOR
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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package org.jpmml.evaluator.tree;

import java.util.Map;

import org.dmg.pmml.FieldName;
import org.dmg.pmml.tree.TreeModel;
import org.jpmml.evaluator.HasEntityId;
import org.jpmml.evaluator.ModelEvaluatorTest;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

public class NoTrueChildStrategyTest extends ModelEvaluatorTest {

	@Test
	public void returnNullPrediction() throws Exception {
		HasEntityId targetValue = evaluate(TreeModel.NoTrueChildStrategy.RETURN_NULL_PREDICTION, 0d);

		assertNull(targetValue);

		targetValue = evaluate(TreeModel.NoTrueChildStrategy.RETURN_NULL_PREDICTION, 0.5d);

		assertNull(targetValue);

		targetValue = evaluate(TreeModel.NoTrueChildStrategy.RETURN_NULL_PREDICTION, 1d);

		assertEquals("3", targetValue.getEntityId());
	}

	@Test
	public void returnLastPrediction() throws Exception {
		HasEntityId targetValue = evaluate(TreeModel.NoTrueChildStrategy.RETURN_LAST_PREDICTION, 0d);

		// The root Node evaluates to true, but it cannot be returned as a result, because it does not specify a score attribute
		assertNull(targetValue);

		targetValue = evaluate(TreeModel.NoTrueChildStrategy.RETURN_LAST_PREDICTION, 0.5d);

		assertEquals("2", targetValue.getEntityId());

		targetValue = evaluate(TreeModel.NoTrueChildStrategy.RETURN_LAST_PREDICTION, 1d);

		assertEquals("3", targetValue.getEntityId());
	}

	private HasEntityId evaluate(TreeModel.NoTrueChildStrategy noTrueChildStrategy, Double value) throws Exception {
		TreeModelEvaluator evaluator = (TreeModelEvaluator)createModelEvaluator();

		TreeModel treeModel = evaluator.getModel()
			.setNoTrueChildStrategy(noTrueChildStrategy);

		Map<FieldName, ?> arguments = createArguments("probability", value);

		Map<FieldName, ?> results = evaluator.evaluate(arguments);

		return (HasEntityId)results.get(evaluator.getTargetName());
	}
}