/** Test of finding free rooms at specific time */
  @Test
  public void findFreeRoomsAtSpecificTimeTest() {
    List<Reservation> list = new ArrayList<>();
    list.add(reservation1);
    list.add(reservation2);

    when(reservationDao.findReservationsOfTime(any(Date.class), any(Date.class))).thenReturn(list);
    List<Room> reservedRooms =
        roomService.findFreeRoomsAtSpecificTime(nextMonthFirstDay, nextMonthLastDay);

    verify(reservationDao).findReservationsOfTime(any(Date.class), any(Date.class));
    assertFalse(reservedRooms.contains(room1));
    assertFalse(reservedRooms.contains(room2));
  }