def test_check_out_a_guest_releases_room():
hotel = Hotel()
hotel.check_in('Jim Maui', 301)
hotel.check_out('Jim Maui')
def test_check_out_a_guest():
hotel = Hotel()
hotel.check_in('Bob Dylan', 306)
hotel.check_out('Bob Dylan')
assert(('Bob Dylan' in hotel.guests()) == False)