example of config object validation

config_fest.py

from configobj import ConfigObj, flatten_errors
from validate import Validator

DEFAULTS = {"CATEGORIES": ['bas', 'bap']}
allowed_category_options = "option({0})".format(
    ', '.join([repr(cat) for cat in DEFAULTS['CATEGORIES']])
)
CONFIGSPEC = '''\
logfile = string
[foo]
user = string
pass = string
[__many__]
category = {0}
'''.format(allowed_category_options).splitlines()

UNFORMATTED_CONFIGSPEC = '''\
logfile = string
[foo]
user = string
pass = string
[__many__]
category = allowed_category_options
'''.splitlines()

BAD_CFG_CONTENT = """\
logfile = foo
[foo]
user = bar
pass = baz
[bar]
category = unknown
""".splitlines()

GOOD_CFG_CONTENT = """\
logfile = foo
[foo]
user = bar
pass = baz
[bar]
category = bas
""".splitlines()


for name, spec in [('formatted', CONFIGSPEC),
                   ('unformatted', UNFORMATTED_CONFIGSPEC)]:
    bad_config_file = ConfigObj(BAD_CFG_CONTENT, configspec=spec)
    good_config_file = ConfigObj(GOOD_CFG_CONTENT, configspec=spec)
    validator = Validator()
    bad_results = bad_config_file.validate(validator, preserve_errors=True)
    print('expected to fail: {0}: {1!r}'.format(name, flatten_errors(bad_config_file, bad_results)))
    good_results = good_config_file.validate(validator, preserve_errors=True)
    print('expected to pass: {0}: {1!r}'.format(name, flatten_errors(good_config_file, good_results)))