[rtags] Allow to 'derive' rtags
Since some releases, rtags (structure underlying uicfg) have selector and may be
copied using something like:
new_rtags = deepcopy(original_rtags)
new_rtags.__module__ = __name__
new_rtags.__select__ = custom_selector
The problem is that starting from that, both rtags wil diverge and changes in
original_rtags won't be considered, while we usually want to set a few specific
rules only in new_rtags. To fix this problem, this cset introduces the notion of
"derivated/parent" rtag, eg:
new_rtags = original_rtags.derive(__name__, custom_selector)
Beside easier copying, when using the above method changes in original_rtags
which are not overriden by new_rtags will be considered since it only hold its
specific rules but look among its parent chain for non-found keys.
Along the way, flake8 unittest_rtags.
Closes #16164880
# copyright 2003-2015 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""unittest for cubicweb.dataimport.csv"""
from io import BytesIO
from logilab.common.testlib import TestCase, unittest_main
from cubicweb.dataimport import csv
class UcsvreaderTC(TestCase):
def test_empty_lines_skipped(self):
stream = BytesIO(b'''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(csv.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(csv.ucsvreader(stream, skip_empty=False)))
def test_skip_first(self):
stream = BytesIO(b'a,b,c,d,\n1,2,3,4,\n')
reader = csv.ucsvreader(stream, skipfirst=True, ignore_errors=True)
self.assertEqual(list(reader),
[[u'1', u'2', u'3', u'4', u'']])
stream.seek(0)
reader = csv.ucsvreader(stream, skipfirst=True, ignore_errors=False)
self.assertEqual(list(reader),
[[u'1', u'2', u'3', u'4', u'']])
stream.seek(0)
reader = csv.ucsvreader(stream, skipfirst=False, ignore_errors=True)
self.assertEqual(list(reader),
[[u'a', u'b', u'c', u'd', u''],
[u'1', u'2', u'3', u'4', u'']])
stream.seek(0)
reader = csv.ucsvreader(stream, skipfirst=False, ignore_errors=False)
self.assertEqual(list(reader),
[[u'a', u'b', u'c', u'd', u''],
[u'1', u'2', u'3', u'4', u'']])
if __name__ == '__main__':
unittest_main()