test_verhoeff.doctest - more detailed doctests for stdnum.verhoeff module

Copyright (C) 2010-2024 Arthur de Jong

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This file contains more detailed doctests for the stdnum.verhoeff module. It
tries to test more corner cases and detailed functionality that is not
really useful as module documentation.

>>> from stdnum import verhoeff


These are normal variations that should just work. Calculating checksums:

>>> verhoeff.checksum('654')
1
>>> verhoeff.checksum('1428570')
0
>>> verhoeff.checksum('398438246238642378648236487236482734')
3


The same numbers but now simply ask for validation:

>>> verhoeff.validate('654')
Traceback (most recent call last):
    ...
InvalidChecksum: ...
>>> verhoeff.validate('1428570')
'1428570'
>>> verhoeff.validate('398438246238642378648236487236482734')
Traceback (most recent call last):
    ...
InvalidChecksum: ...


Adding a check digit to the numbers so they are all valid:

>>> verhoeff.calc_check_digit('654')
'8'
>>> verhoeff.validate('6548')
'6548'
>>> verhoeff.calc_check_digit('1428570')
'8'
>>> verhoeff.validate('1428570')
'1428570'
>>> verhoeff.calc_check_digit('398438246238642378648236487236482734')
'7'
>>> verhoeff.validate('3984382462386423786482364872364827347')
'3984382462386423786482364872364827347'


More test cases taken from https://rosettacode.org/wiki/Verhoeff_algorithm

>>> verhoeff.is_valid('123459')
False
>>> verhoeff.calc_check_digit('123456789012')
'0'
>>> verhoeff.is_valid('1234567890120')
True
>>> verhoeff.is_valid('1234567890129')
False
>>> verhoeff.calc_check_digit('236')
'3'
>>> verhoeff.is_valid('2363')
True
>>> verhoeff.is_valid('2369')
False
>>> verhoeff.calc_check_digit('12345')
'1'
>>> verhoeff.is_valid('123451')
True