SQLite 3.45.1
accepted  a correct new bill (control)
REFUSED   status 'washing'
          CHECK constraint failed: Bill_status_enum
REFUSED   unit 0
          CHECK constraint failed: Bill_unit_pos
REFUSED   negative payment
          CHECK constraint failed: Bill_payment_nonneg
REFUSED   'finished' but no finish time
          CHECK constraint failed: Bill_status_times
REFUSED   unknown customer C9999
          FOREIGN KEY constraint failed
REFUSED   unknown outlet O09
          FOREIGN KEY constraint failed
REFUSED   duplicate bill id B0001
          UNIQUE constraint failed: Bill.id
REFUSED   bill id B99901 (6 characters)
          CHECK constraint failed: Bill_id_len
REFUSED   payment method 'gopay'
          CHECK constraint failed: Payment_method_enum
REFUSED   payment amount 0
          CHECK constraint failed: Payment_amount_pos
REFUSED   delete service S0001 (has bills)
          FOREIGN KEY constraint failed
REFUSED   delete supervisor E0002 (has staff)
          FOREIGN KEY constraint failed
REFUSED   second employee with owner's e-mail
          UNIQUE constraint failed: Employee.email
accepted  rename customer C0001 -> C9001 (cascades) (10 bills follow)
