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

Copyright (C) 2010 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.is_valid('654')
False
>>> verhoeff.is_valid('1428570')
True
>>> verhoeff.is_valid('398438246238642378648236487236482734')
False


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

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