[multi-sources-removal] Turn ConnectionsSet into simpler ConnectionWrapper
also, SqliteConnectionWrapper becomes a subclass. This is allowed since
now ConnectionsSet responsability has been reduced to handling the system
source only.
This changeset also:
* drops useless cnxset_set / check_connection api
* deprecates former .source / .connection / container api
but it renames neither the session's cnxset attribute, nor the related
repository method.
Related to #2919300
from StringIO import StringIO
from logilab.common.testlib import TestCase, unittest_main
from cubicweb import dataimport
class UcsvreaderTC(TestCase):
def test_empty_lines_skipped(self):
stream = StringIO('''a,b,c,d,
1,2,3,4,
,,,,
,,,,
''')
self.assertEqual([[u'a', u'b', u'c', u'd', u''],
[u'1', u'2', u'3', u'4', u''],
],
list(dataimport.ucsvreader(stream)))
stream.seek(0)
self.assertEqual([[u'a', u'b', u'c', u'd', u''],
[u'1', u'2', u'3', u'4', u''],
[u'', u'', u'', u'', u''],
[u'', u'', u'', u'', u'']
],
list(dataimport.ucsvreader(stream, skip_empty=False)))
if __name__ == '__main__':
unittest_main()