@Test
    public void testAddBlackMarker() {
        System.out.println("addBlackMarker");
        Cell instance = new Cell(0,0);
        instance.addBlackMarker(0);
        instance.addBlackMarker(1);
        instance.addBlackMarker(2);
        instance.addBlackMarker(3);
        instance.addBlackMarker(4);
        instance.addBlackMarker(5);
        
        boolean[] result = instance.getMarkers(true);
        assertEquals(true, result[0]);
        assertEquals(true, result[1]);
        assertEquals(true, result[2]);
        assertEquals(true, result[3]);
        assertEquals(true, result[4]);
        assertEquals(true, result[5]);
    }