/** If there is a free room, getFreeRoom must return a room without guest. */
@Test
public void testGetFreeRoomFromNotFullHotel() {
Room room = hotel.getFreeRoom();
assertNull("A room is free", room.getGuest());
hotel.checkIn(correctPassword, GUEST_NAME_1);
Room freeRoom = hotel.getFreeRoom();
assertNotNull("Another room is free", freeRoom);
assertNotEquals("Another room is free", room, freeRoom);
}
/** If there is no free room, getFreeRoom must return null. */
@Test
public void testGetFreeRoomFromFullHotel() {
hotel.checkIn(correctPassword, GUEST_NAME_1);
hotel.checkIn(correctPassword, GUEST_NAME_2);
Room noRoom = hotel.getFreeRoom();
assertNull("No room available in a full hotel", noRoom);
}