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

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;


public class SimpleTest {

    private static KGrootsteElementen k;

    @BeforeClass
    public static void init() {
        k = new KGrootsteElementenBepaler();
    }

    @Test
    public void test1() {
        List<Integer> input = new ArrayList<>();
        for(int i = 0; i <= 1000; i++) {
            input.add(i);
        }
        List<Integer> antw = k.bepaalKGrootsteElementen(Collections.unmodifiableList(input), 20);
        antw.sort(Comparator.naturalOrder());
        Assert.assertEquals(input.subList(981, 1001), antw);
    }

    @Test
    public void test2() {
        List<Integer> input = Arrays.asList(9, 92, 82, 85, 76, 30, 77, 89, 60);
        List<Integer> antw = k.bepaalKGrootsteElementen(Collections.unmodifiableList(input), 12);
        antw.sort(Comparator.naturalOrder());
        Assert.assertEquals(Arrays.asList(9, 30, 60, 76, 77, 82, 85, 89, 92), antw);
    }

    @Test
    public void test3() {
        List<Integer> input = Arrays.asList(7, 46, 54, 98, 11, 58, 25, 11, 84,
                97, 51, 22, 87, 12, 95, 64, 97, 98, 55, 2, 2, 22, 48, 68, 41, 55, 9, 15, 30, 97);
        List<Integer> antw = k.bepaalKGrootsteElementen(Collections.unmodifiableList(input), 5);
        antw.sort(Comparator.naturalOrder());
        Assert.assertEquals(Arrays.asList(97, 97, 97, 98, 98), antw);
    }

    @Test
    public void test4() {
        List<Integer> input = Arrays.asList(99, 88, 79, 82, 49, 85, 21, 61, 59, 25, 54, 15, 57, 69, 15);
        List<Integer> antw = k.bepaalKGrootsteElementen(Collections.unmodifiableList(input), 3);
        antw.sort(Comparator.naturalOrder());
        Assert.assertEquals(Arrays.asList(85, 88, 99), antw);
    }

    @Test
    public void testEmpty() {
        Assert.assertEquals(Collections.emptyList(), k.bepaalKGrootsteElementen(Collections.emptyList(), 3));
    }

}