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 package org.apache.commons.math.genetics; 018 019 import static org.junit.Assert.*; 020 021 import org.junit.Test; 022 023 public class BinaryMutationTest { 024 025 @Test 026 public void testMutate() { 027 BinaryMutation mutation = new BinaryMutation(); 028 029 // stochastic testing :) 030 for (int i=0; i<20; i++) { 031 DummyBinaryChromosome original = new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(10)); 032 DummyBinaryChromosome mutated = (DummyBinaryChromosome) mutation.mutate(original); 033 034 // one gene should be different 035 int numDifferent = 0; 036 for (int j=0; j<original.getRepresentation().size(); j++) { 037 if (original.getRepresentation().get(j) != mutated.getRepresentation().get(j)) 038 numDifferent++; 039 } 040 assertEquals(1, numDifferent); 041 } 042 } 043 044 }