'If a row is composed only of empty values (due to having
filtered out non-empty values from it), it should be removed'

def test_norow(self):

    import_wizard = self.env['base_import.import'].create({'res_model': 'base_import.tests.models.preview', 'file': 'name,Some    Value,Counter\nfoo,1,2\n,3,\n,5,6\n', 'file_type': 'text/csv'})
    (data, fields) = import_wizard._convert_import_data(['name', False, 'othervalue'], {'quoting': '"', 'separator': ',', 'headers': True})
    self.assertItemsEqual(fields, ['name', 'othervalue'])
    self.assertItemsEqual(data, [['foo', '2'], ['', '6']])
