1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.math4.legacy.genetics;
18
19
20 import org.junit.Assert;
21 import org.junit.Test;
22
23 public class BinaryMutationTest {
24
25 @Test
26 public void testMutate() {
27 BinaryMutation mutation = new BinaryMutation();
28
29 // stochastic testing :)
30 for (int i=0; i<20; i++) {
31 DummyBinaryChromosome original = new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(10));
32 DummyBinaryChromosome mutated = (DummyBinaryChromosome) mutation.mutate(original);
33
34 // one gene should be different
35 int numDifferent = 0;
36 for (int j=0; j<original.getRepresentation().size(); j++) {
37 if (original.getRepresentation().get(j) != mutated.getRepresentation().get(j)) {
38 numDifferent++;
39 }
40 }
41 Assert.assertEquals(1, numDifferent);
42 }
43 }
44 }