/*
* 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.math4.genetics;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import org.apache.commons.math4.exception.MathIllegalArgumentException;
import org.apache.commons.math4.genetics.RandomKey;
import org.junit.Assert;
import org.junit.Test;
@SuppressWarnings("boxing")
public class RandomKeyTest {
@Test(expected=MathIllegalArgumentException.class)
public void testConstructor1() {
new DummyRandomKey(new Double[] {0.2, 0.3, 1.2});
}
@Test(expected=MathIllegalArgumentException.class)
public void testConstructor2() {
new DummyRandomKey(new Double[] {0.2, 0.3, -0.2});
}
@Test
public void testIsSame() {
DummyRandomKey drk1 = new DummyRandomKey(new Double[] {0.4, 0.1, 0.5, 0.8, 0.2});
DummyRandomKey drk2 = new DummyRandomKey(new Double[] {0.4, 0.1, 0.5, 0.8, 0.2});
DummyRandomKey drk3 = new DummyRandomKey(new Double[] {0.4, 0.15, 0.5, 0.8, 0.2});
DummyRandomKey drk4 = new DummyRandomKey(new Double[] {0.4, 0.25, 0.5, 0.8, 0.2});
DummyRandomKey drk5 = new DummyRandomKey(new Double[] {0.4, 0.25, 0.5, 0.8, 0.2, 0.5});
Assert.assertTrue(drk1.isSame(drk2));
Assert.assertTrue(drk2.isSame(drk3));
Assert.assertFalse(drk3.isSame(drk4));
Assert.assertFalse(drk4.isSame(drk5));
}
@Test
public void testDecode() {
DummyRandomKey drk = new DummyRandomKey(new Double[] {0.4, 0.1, 0.5, 0.8, 0.2});
List<String> decoded = drk.decode(Arrays.asList(new String[] {"a", "b", "c", "d", "e"}));
Assert.assertEquals("b", decoded.get(0));
Assert.assertEquals("e", decoded.get(1));
Assert.assertEquals("a", decoded.get(2));
Assert.assertEquals("c", decoded.get(3));
Assert.assertEquals("d", decoded.get(4));
}
@Test(expected=MathIllegalArgumentException.class)
public void testInvalidRepresentation() {
new DummyRandomKey(new Double[] {0.1, 0.1, 2d, 0.8, 0.2});
}
@Test
public void testRandomPermutation() {
// never generate an invalid one
for (int i=0; i<10; i++) {
DummyRandomKey drk = new DummyRandomKey(RandomKey.randomPermutation(20));
Assert.assertNotNull(drk);
}
}
@Test
public void testIdentityPermutation() {
DummyRandomKey drk = new DummyRandomKey(RandomKey.identityPermutation(5));
List<String> decoded = drk.decode(Arrays.asList(new String[] {"a", "b", "c", "d", "e"}));
Assert.assertEquals("a", decoded.get(0));
Assert.assertEquals("b", decoded.get(1));
Assert.assertEquals("c", decoded.get(2));
Assert.assertEquals("d", decoded.get(3));
Assert.assertEquals("e", decoded.get(4));
}
@Test
public void testComparatorPermutation() {
List<String> data = Arrays.asList(new String[] {"x", "b", "c", "z", "b"});
List<Double> permutation = RandomKey.comparatorPermutation(data, new Comparator<String>() {
@Override
public int compare(String o1, String o2) {
return o1.compareTo(o2);
}
});
Double[] permArr = new Double[data.size()];
permArr = permutation.toArray(permArr);
Assert.assertArrayEquals(new Double[] {0.6,0.0,0.4,0.8,0.2}, permArr);
List<String> decodedData = new DummyRandomKey(permutation).decode(data);
Assert.assertEquals("b", decodedData.get(0));
Assert.assertEquals("b", decodedData.get(1));
Assert.assertEquals("c", decodedData.get(2));
Assert.assertEquals("x", decodedData.get(3));
Assert.assertEquals("z", decodedData.get(4));
permutation = RandomKey.comparatorPermutation(data, new Comparator<String>() {
@Override
public int compare(String o1, String o2) {
return o2.compareTo(o1);
}
});
permArr = new Double[data.size()];
permArr = permutation.toArray(permArr);
Assert.assertArrayEquals(new Double[] {0.2,0.6,0.4,0.0,0.8}, permArr);
decodedData = new DummyRandomKey(permutation).decode(data);
Assert.assertEquals("z", decodedData.get(0));
Assert.assertEquals("x", decodedData.get(1));
Assert.assertEquals("c", decodedData.get(2));
Assert.assertEquals("b", decodedData.get(3));
Assert.assertEquals("b", decodedData.get(4));
}
@Test
public void testInducedPermutation() {
List<String> origData = Arrays.asList(new String[] {"a", "b", "c", "d", "d"});
List<String> permutedData = Arrays.asList(new String[] {"d", "b", "c", "a", "d"});
DummyRandomKey drk = new DummyRandomKey(RandomKey.inducedPermutation(origData, permutedData));
List<String> decoded = drk.decode(origData);
Assert.assertEquals("d", decoded.get(0));
Assert.assertEquals("b", decoded.get(1));
Assert.assertEquals("c", decoded.get(2));
Assert.assertEquals("a", decoded.get(3));
Assert.assertEquals("d", decoded.get(4));
try {
RandomKey.inducedPermutation(
Arrays.asList(new String[] {"a", "b", "c", "d", "d"}),
Arrays.asList(new String[] {"a", "b", "c", "d"})
);
Assert.fail("Uncaught exception");
} catch (MathIllegalArgumentException e) {
// no-op
}
try {
RandomKey.inducedPermutation(
Arrays.asList(new String[] {"a", "b", "c", "d", "d"}),
Arrays.asList(new String[] {"a", "b", "c", "d", "f"})
);
Assert.fail("Uncaught exception");
} catch (MathIllegalArgumentException e) {
// no-op
}
}
@Test
public void testEqualRepr() {
DummyRandomKey drk = new DummyRandomKey(new Double[] {0.2, 0.2, 0.5});
List<String> decodedData = drk.decode(Arrays.asList(new String[] {"a", "b", "c"}));
Assert.assertEquals("a", decodedData.get(0));
Assert.assertEquals("b", decodedData.get(1));
Assert.assertEquals("c", decodedData.get(2));
}
}