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 RandomKeyMutationTest { 024 025 @Test 026 public void testMutate() { 027 MutationPolicy mutation = new RandomKeyMutation(); 028 int l=10; 029 for (int i=0; i<20; i++) { 030 DummyRandomKey origRk = new DummyRandomKey(RandomKey.randomPermutation(l)); 031 Chromosome mutated = mutation.mutate(origRk); 032 DummyRandomKey mutatedRk = (DummyRandomKey) mutated; 033 034 int changes = 0; 035 for (int j=0; j<origRk.getLength(); j++) { 036 if (origRk.getRepresentation().get(j) != mutatedRk.getRepresentation().get(j)) { 037 changes++; 038 } 039 } 040 assertEquals(1,changes); 041 } 042 } 043 044 }