>>> from storage import *
>>> from StringIO import StringIO

>>> f = openCheck('non_existant_file.txt')
File non_existant_file.txt could not be opened.

>>> nonexistentFilename = "nonexistent"
>>> loadPrototypeMatchIndexesFromSqlite(nonexistentFilename)
DB Error: no such table: prototypes
[]
>>> loadTrajectoriesFromSqlite(nonexistentFilename, 'feature')
DB Error: no such table: positions
DB Error: no such table: velocities
[]
>>> from os import remove
>>> remove(nonexistentFilename)

>>> strio = StringIO('# asdlfjasdlkj0\nsadlkfjsdlakjf')
>>> readline(strio)
'sadlkfjsdlakjf'
>>> strio = StringIO('# asdlfjasdlkj0\nsadlkfjsdlakjf')
>>> readline(strio, ['#'])
'sadlkfjsdlakjf'
>>> strio = StringIO('# asdlfjasdlkj0\nsadlkfjsdlakjf')
>>> readline(strio, ['%'])
'# asdlfjasdlkj0'
>>> strio = StringIO('# asdlfjasdlkj0\nsadlkfjsdlakjf')
>>> readline(strio, '%*$')
'# asdlfjasdlkj0'
>>> readline(strio, '%#')
'sadlkfjsdlakjf'
