001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018 package org.apache.commons.math.distribution; 019 020 /** 021 * Test cases for {@link ZipfDistribution}. 022 * Extends IntegerDistributionAbstractTest. See class javadoc for 023 * IntegerDistributionAbstractTest for details. 024 * 025 * @version $Revision: 762087 $ $Date: 2009-04-05 10:20:18 -0400 (Sun, 05 Apr 2009) $ 026 */ 027 public class ZipfDistributionTest extends IntegerDistributionAbstractTest { 028 public ZipfDistributionTest(String name) { 029 super(name); 030 } 031 032 //-------------- Implementations for abstract methods ----------------------- 033 034 /** Creates the default discrete distribution instance to use in tests. */ 035 @Override 036 public IntegerDistribution makeDistribution() { 037 return new ZipfDistributionImpl(10, 1); 038 } 039 040 /** Creates the default probability density test input values */ 041 @Override 042 public int[] makeDensityTestPoints() { 043 return new int[] {-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}; 044 } 045 046 /** Creates the default probability density test expected values */ 047 @Override 048 public double[] makeDensityTestValues() { 049 return new double[] {0d, 0d, 0.3414d, 0.1707d, 0.1138d, 0.0854d, 0.0683d, 050 0.0569d, 0.0488d, 0.0427d, 0.0379d, 0.0341d, 0d}; 051 } 052 053 /** Creates the default cumulative probability density test input values */ 054 @Override 055 public int[] makeCumulativeTestPoints() { 056 return makeDensityTestPoints(); 057 } 058 059 /** Creates the default cumulative probability density test expected values */ 060 @Override 061 public double[] makeCumulativeTestValues() { 062 return new double[] {0d, 0.0000d, 0.3414d, 0.5121d, 0.6259d, 0.7113d, 063 0.7796d, 0.8365d, 0.8852d, 0.9279d, 0.9659d, 1d, 1d}; 064 } 065 066 /** Creates the default inverse cumulative probability test input values */ 067 @Override 068 public double[] makeInverseCumulativeTestPoints() { 069 return new double[] {0, 0.001d, 0.010d, 0.025d, 0.050d, 0.3414d, 0.3415d, 0.999d, 070 0.990d, 0.975d, 0.950d, 0.900d, 1}; 071 } 072 073 /** Creates the default inverse cumulative probability density test expected values */ 074 @Override 075 public int[] makeInverseCumulativeTestValues() { 076 return new int[] {0, 0, 0, 0, 0, 0, 1, 9, 9, 9, 8, 7, 10}; 077 } 078 }