MidBreakCrossoverTest.java

package ngenes2.ops.crossover;

import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
import static org.junit.Assert.*;

public class MidBreakCrossoverTest {

    @Test
    public void testMate() {
        final Integer ONE = new Integer(1);
        final Integer TWO = new Integer(2);
        final int size = 4;
        List<Integer> l1 = new ArrayList<Integer>(size);
        List<Integer> l2 = new ArrayList<Integer>(size);
        for (int i = 0; i < size; i++) {
            l1.add(ONE);
            l2.add(TWO);
        }
        MidBreakCrossover<Integer> co = new MidBreakCrossover<Integer>();
        List<List<Integer>> result = co.mate(l1, l2);
        assertEquals(2, result.size());
        for (List<Integer> chrome : result) {
            if (chrome.get(0) == ONE) {
                assertSame(ONE, chrome.get(1));
                assertSame(TWO, chrome.get(2));
                assertSame(TWO, chrome.get(3));
            } else {
                assertSame(TWO, chrome.get(0));
                assertSame(TWO, chrome.get(1));
                assertSame(ONE, chrome.get(2));
                assertSame(ONE, chrome.get(3));
            }
        }
        assertSame(result.get(0).get(0), result.get(1).get(3));
    }

    @Test(expected = IllegalArgumentException.class)
    public void testSameLength() {
        List<Integer> l1 = new ArrayList<Integer>(1);
        l1.add(1);
        List<Integer> l2 = new ArrayList<Integer>(2);
        l2.add(2);
        l2.add(2);
        MidBreakCrossover<Integer> co = new MidBreakCrossover<Integer>();
        co.mate(l1, l2);
    }
}