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)))

    def test_skip_first(self):
        stream = StringIO('a,b,c,d,\n'
                          '1,2,3,4,\n')
        reader = dataimport.ucsvreader(stream, skipfirst=True,
                                       ignore_errors=True)
        self.assertEqual(list(reader),
                         [[u'1', u'2', u'3', u'4', u'']])

        stream.seek(0)
        reader = dataimport.ucsvreader(stream, skipfirst=True,
                                       ignore_errors=False)
        self.assertEqual(list(reader),
                         [[u'1', u'2', u'3', u'4', u'']])

        stream.seek(0)
        reader = dataimport.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 = dataimport.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()