def test_booking_number_looks_like_a_suitable_string():
service = BookingReferenceService(123456789)
booking_number = service.booking_reference()
assert len(booking_number) > 5
assert not booking_number.startswith("0x")
def test_booking_number_looks_like_a_suitable_string():
service = BookingReferenceService(123456789)
booking_number = service.booking_reference()
assert len(booking_number) > 5
assert not booking_number.startswith("0x")
def test_booking_reference_is_unique():
service = BookingReferenceService(123456789)
booking_number1 = service.booking_reference()
booking_number2 = service.booking_reference()
assert not booking_number1 == booking_number2
def test_booking_reference_is_unique():
service = BookingReferenceService(123456789)
booking_number1 = service.booking_reference()
booking_number2 = service.booking_reference()
assert not booking_number1 == booking_number2