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

import java.util.*;


public class SimpleTest {

    private static Scheduler scheduler;

    @BeforeClass
    public static void init() {
        scheduler = new MinimizeLatenessScheduler();
    }

    @Test
    public void test1() {
        List<Task> tasks = Arrays.asList(
                new Task(1, 7),
                new Task(2, 5),
                new Task(3, 5),
                new Task(4, 6)
        );
        check(tasks, 3, scheduler.schedule(Collections.unmodifiableCollection(tasks)));
    }

    @Test
    public void testEmpty() {
        Collection<Task> tasks = Collections.emptyList();
        check(tasks, 0, scheduler.schedule(Collections.unmodifiableCollection(tasks)));
    }

    static void check(Collection<Task> tasks, int minLateness, Map<Task, Integer> solution) {
        Assert.assertEquals("", tasks.size(), solution.size());

        int lateness = 0;
        for (Task task : tasks) {
            Integer start = solution.get(task);
            Assert.assertNotNull(task + " ontbreekt in de oplossing.", start);
            lateness = Math.max(lateness, solution.get(task) + task.getLength() - task.getDeadline());
        }

        Assert.assertEquals("De laattijdigheid is niet minimaal.", minLateness, lateness);
    }
    
}