[test] Fix test breakage uncovered by previous changeset
Now that Binary.__eq__ doesn't always return true, this test started
failing. CWAttribute.defaultval is zpickled, and the description_format
attribute is a String, meaning unicode, so adjust the expected test
result.
from cubicweb.schemas.base import in_group, CWSourceSchemaConfig
# copy __permissions__ to avoid modifying a shared dictionary
in_group.__permissions__ = in_group.__permissions__.copy()
in_group.__permissions__['read'] = ('managers',)
cw_for_source = CWSourceSchemaConfig.get_relation('cw_for_source')
cw_for_source.__permissions__ = {'read': ('managers', 'users'),
'add': ('managers',),
'delete': ('managers',)}