/*
 * JaamSim Discrete Event Simulation
 * Copyright (C) 2013 Ausenco Engineering Canada Inc.
 * Copyright (C) 2019-2021 JaamSim Software Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jaamsim.probability;

import static org.junit.Assert.assertTrue;

import org.junit.Before;
import org.junit.Test;

import com.jaamsim.ProbabilityDistributions.LogNormalDistribution;
import com.jaamsim.basicsim.JaamSimModel;
import com.jaamsim.basicsim.ObjectType;
import com.jaamsim.basicsim.Simulation;
import com.jaamsim.input.InputAgent;
import com.jaamsim.math.MathUtils;

public class TestLogNormalDistribution {

	JaamSimModel simModel;

	@Before
	public void setupTests() {
		simModel = new JaamSimModel();
		simModel.createInstance(Simulation.class);
	}

	@Test
	public void MeanAndStandardDeviation() {
		ObjectType t = InputAgent.defineEntityWithUniqueName(simModel, ObjectType.class, "TestType", "-", true);
		InputAgent.applyArgs(t, "JavaClass", "com.jaamsim.units.DimensionlessUnit");

		LogNormalDistribution dist = InputAgent.defineEntityWithUniqueName(simModel, LogNormalDistribution.class, "Dist", "-", true);
		InputAgent.applyArgs(dist, "UnitType", t.getName());
		InputAgent.applyArgs(dist, "NormalMean", "10.0");
		InputAgent.applyArgs(dist, "NormalStandardDeviation", "2.0");
		InputAgent.applyArgs(dist, "RandomSeed", "1");
		dist.validate();
		dist.earlyInit();

		int numSamples = 10000000;
		double total = TestContinuousDistribution.sampleDistribution(dist, numSamples);
		double mean = total / numSamples;

		assertTrue( MathUtils.near(dist.getSampleMean(0.0), mean) );
		assertTrue( Math.abs( dist.getSampleMean(0.0) / dist.getMeanValue(0.0) - 1.0 ) < 0.01 );
		assertTrue( Math.abs( dist.getSampleStandardDeviation(0.0) / dist.getStandardDeviation(0.0) - 1.0 ) < 0.03 );
	}
}

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@@ -1800,19 +1800,19 @@
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fix unit test 'TestLogNormalDistribution'