import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

public class SimpleTest {
    
    private static RationalKnapsack rk;
    private static final double TOL = 1e-8;
    
    @BeforeClass public static void init() {
        rk = new RationalKnapsack();
    }
    
    @Test
    public void test1() {
        
        List<KnapsackItem> items = Arrays.asList(
            new KnapsackItem(5.1,6.1),
            new KnapsackItem(3.0,7.3),
            new KnapsackItem(4.5,2.0),
            new KnapsackItem(1.1,2.7),
            new KnapsackItem(9.0,7.6)
        );
        double capaciteit = 11.0;
        
        Map<KnapsackItem, Double> antw = rk.select(Collections.unmodifiableList(items), capaciteit);
        
        // Controleren of alle waarden van de sleutels in antw overeenkomen met deze in opl.
        check(antw, items.get(0), 1.0);
        check(antw, items.get(1), 1.0);
        check(antw, items.get(2), 0.0);
        check(antw, items.get(3), 1.0);
        check(antw, items.get(4), 0.2);
    }
    
    @Test
    public void test2() {
        
        List<KnapsackItem> items = Arrays.asList(
            new KnapsackItem(7.1,8.0),
            new KnapsackItem(3.0,3.0),
            new KnapsackItem(4.3,3.0),
            new KnapsackItem(1.0,2.7),
            new KnapsackItem(1.1,5.6),
            new KnapsackItem(3.0,3.0),
            new KnapsackItem(9.0,8.2)
        );
        double capaciteit = 23.0;
        
        Map<KnapsackItem, Double> antw = rk.select(Collections.unmodifiableList(items), capaciteit);
        
        // Controleren of alle waarden van de sleutels in antw overeenkomen met deze in opl.
        check(antw, items.get(0), 1.0);
        check(antw, items.get(1), 1.0);
        check(antw, items.get(2), 0.0);
        check(antw, items.get(3), 1.0);
        check(antw, items.get(4), 1.0);
        check(antw, items.get(5), 1.0);
        check(antw, items.get(6), 13.0/15.0);
    }
    
    
    @Test
    public void test3() {
        
        List<KnapsackItem> items = Arrays.asList(
            new KnapsackItem(14.5,8.0),
            new KnapsackItem(9.0,10.0),
            new KnapsackItem(15.3,3.0),
            new KnapsackItem(12.0,15.5),
            new KnapsackItem(14.1,10.6),
            new KnapsackItem(8.0,9.0)
        );
        double capaciteit = 20.0;
        
        Map<KnapsackItem, Double> antw = rk.select(Collections.unmodifiableList(items), capaciteit);
        
        // Controleren of alle waarden van de sleutels in antw overeenkomen met deze in opl.
        check(antw, items.get(0), 0.0);
        check(antw, items.get(1), 0.0);
        check(antw, items.get(2), 0.0);
        check(antw, items.get(3), 1.0);
        check(antw, items.get(4), 0.0);
        check(antw, items.get(5), 1.0);
    }
    
    private void check(Map<KnapsackItem,Double> opl, KnapsackItem item, Double ratio){
        Assert.assertEquals(ratio, opl.getOrDefault(item, 0.0), TOL);
    }
    
}