#!/usr/bin/python2.7

		>>> UsernameHandler(20).format_username('Max.Mustermann')

		'Max.Mustermann'

		>>> UsernameHandler(20).format_username('.')   # doctest: +IGNORE_EXCEPTION_DETAIL

		Traceback (most recent call last):

		...

		FormatError:

		>>> UsernameHandler(20).format_username('.Max.Mustermann.')

		'Max.Mustermann'

		>>> UsernameHandler(4).format_username('Max.Mustermann')

		'M'

		>>> for c in '\x01\x00\x03\x02\x05\x04\x07\x06\t\x08\x0b\n\r\x0c\x0f\x0e\x11\x10\x13\x12\x15\x14\x17\x16\x19\x18\x1b\x1a\x1d\x1c\x1f\x1e! #"%$\'&)(+*-,/;:=<?>@[]\\_^`{}|\x7f~':

		...  assert 'Max' == UsernameHandler(20).format_username('Ma%sx' % (c,))

		...

		>>> UsernameHandler(20).format_username('Max.Mustermann12.4567890')

		'Max.Mustermann12'

		>>> for c in '.1032547698ACBEDGFIHKJMLONQPSRUTWVYXZacbedgfihkjmlonqpsrutwvyxz':

		...  assert 'Ma%sx' % (c,) == UsernameHandler(20).format_username('Ma%sx' % (c,))

		...

		>>> UsernameHandler(20).format_username('Max[Muster]Mann')

		'MaxMusterMann'

		>>> UsernameHandler(20).format_username('Max[ALWAYSCOUNTER].Mustermann')

		'Max1.Mustermann'

		>>> UsernameHandler(20).format_username('Max[ALWAYSCOUNTER].Mustermann')

		'Max2.Mustermann'

		>>> UsernameHandler(20).format_username('Max[ALWAYSCOUNTER].Mustermann')

		'Max3.Mustermann'

		>>> UsernameHandler(20).format_username('Max[COUNTER2].Mustermann')

		'Max4.Mustermann'

		>>> UsernameHandler(20).format_username('Maria[ALWAYSCOUNTER].Musterfrau')

		'Maria1.Musterfrau'

		>>> UsernameHandler(20).format_username('Moritz[COUNTER2]')

		'Moritz'

		>>> UsernameHandler(20).format_username('Moritz[COUNTER2]')

		'Moritz2'

		>>> for i, c in enumerate('\x01\x00\x03\x02\x05\x04\x07\x06\t\x08\x0b\n\r\x0c\x0f\x0e\x11\x10\x13\x12\x15\x14\x17\x16\x19\x18\x1b\x1a\x1d\x1c\x1f\x1e! #"%$\'&)(+*-,/;:=<?>@\\_^`{}|\x7f~', 1):

		...  assert 'Foo%d' % (i) == UsernameHandler(20).format_username('Fo%so[ALWAYSCOUNTER]' % (c,))

if __name__ == '__main__':

	import doctest

	doctest.testmod()