test_isbn.doctest - more detailed doctests for stdnum.isbn module

Copyright (C) 2010 Arthur de Jong

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

>>> from stdnum import isbn


These are normal variations that should just work.

>>> isbn.is_valid('978-9024538270')
True
>>> isbn.is_valid(u'1857982185')
True
>>> isbn.is_valid('85152-629-2') # 9-digit SBN (silently converted to ISBN10)
True


These are tests to check what happes when a wrong type is passed.

>>> isbn.is_valid(1857982185) # integer, not string
False
>>> isbn.is_valid(None)
False
>>> isbn.is_valid('')
False


Tests for mangling and incorect check digits.

>>> isbn.is_valid('08515x-629-2') # added X in the middle
False
>>> isbn.is_valid('85152-629-1') # incorrect check digit
False
>>> isbn.is_valid('978-902453827X') # ISBN with X check digit
False


See if ISBN10 to 13 conversion works.

>>> isbn.to_isbn13('978-9024538270') # ISBN13 should stay ISBN13
'978-9024538270'
>>> isbn.to_isbn13('1 85798218 5')
'978 1 85798218 3'
>>> isbn.to_isbn13('1857982185')
'9781857982183'
>>> isbn.to_isbn13('1-85798-218-5')
'978-1-85798-218-3'
>>> isbn.is_valid(isbn.to_isbn13('1 85798218 5'))
True


Regrouping tests.

>>> isbn.split('9024538270') # normal ISBN10
('', '90', '245', '3827', '0')
>>> isbn.split('9999678270') # ISBN10, unknown publisher in group
('', '99996', '', '7827', '0')
>>> isbn.split('979-20-1234567-8')
('979', '', '', '201234567', '8')


Some tests for the ranges module. This is more an internal module so
tests here are not very critical.

>>> from stdnum.isbn import ranges
>>> list(ranges._wrap(2 * 'abc def ghijklmn opqr stuvwx yz', 40))[0]
'abc def ghijklmn opqr stuvwx yzabc def'


Test output function. Bit of a limited test but we see if the serialised
form of the prefix/ranges list contains at least the same prefixes as the
current _prefixes list.

>>> import StringIO
>>> output = StringIO.StringIO()
>>> ranges.output(output)
>>> k = set( x.split(' ')[0] for x in StringIO.StringIO(output.getvalue()).readlines() )
>>> k == set(ranges._prefixes.keys())
True