/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.math.distribution;

/**
 * Test cases for {@link ZipfDistribution}. Extends
 * IntegerDistributionAbstractTest. See class javadoc for
 * IntegerDistributionAbstractTest for details.
 * 
 * @version $Revision$ $Date$
 */
public class ZipfDistributionTest extends IntegerDistributionAbstractTest {
	public ZipfDistributionTest(String name) {
		super(name);
	}

	// -------------- Implementations for abstract methods
	// -----------------------

	/** Creates the default discrete distribution instance to use in tests. */
	@Override
	public IntegerDistribution makeDistribution() {
		return new ZipfDistributionImpl(10, 1);
	}

	/** Creates the default probability density test input values */
	@Override
	public int[] makeDensityTestPoints() {
		return new int[] { -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
	}

	/** Creates the default probability density test expected values */
	@Override
	public double[] makeDensityTestValues() {
		return new double[] { 0d, 0d, 0.3414d, 0.1707d, 0.1138d, 0.0854d, 0.0683d, 0.0569d, 0.0488d, 0.0427d, 0.0379d,
				0.0341d, 0d };
	}

	/** Creates the default cumulative probability density test input values */
	@Override
	public int[] makeCumulativeTestPoints() {
		return makeDensityTestPoints();
	}

	/**
	 * Creates the default cumulative probability density test expected values
	 */
	@Override
	public double[] makeCumulativeTestValues() {
		return new double[] { 0d, 0.0000d, 0.3414d, 0.5121d, 0.6259d, 0.7113d, 0.7796d, 0.8365d, 0.8852d, 0.9279d,
				0.9659d, 1d, 1d };
	}

	/** Creates the default inverse cumulative probability test input values */
	@Override
	public double[] makeInverseCumulativeTestPoints() {
		return new double[] { 0, 0.001d, 0.010d, 0.025d, 0.050d, 0.3414d, 0.3415d, 0.999d, 0.990d, 0.975d, 0.950d,
				0.900d, 1 };
	}

	/**
	 * Creates the default inverse cumulative probability density test expected
	 * values
	 */
	@Override
	public int[] makeInverseCumulativeTestValues() {
		return new int[] { 0, 0, 0, 0, 0, 0, 1, 9, 9, 9, 8, 7, 10 };
	}
}