/*
 * 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.genetics;

import static org.junit.Assert.*;

import org.junit.Test;

public class BinaryMutationTest {

	@Test
	public void testMutate() {
		BinaryMutation mutation = new BinaryMutation();

		// stochastic testing :)
		for (int i = 0; i < 20; i++) {
			DummyBinaryChromosome original = new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(10));
			DummyBinaryChromosome mutated = (DummyBinaryChromosome) mutation.mutate(original);

			// one gene should be different
			int numDifferent = 0;
			for (int j = 0; j < original.getRepresentation().size(); j++) {
				if (original.getRepresentation().get(j) != mutated.getRepresentation().get(j))
					numDifferent++;
			}
			assertEquals(1, numDifferent);
		}
	}

}
