def test_get_columns_concat_single_column(self):

        columns = ["example_column"]

        self.assertEqual(columns[0],
                         PayloadBuilder.get_columns_concat(columns=columns)[0])

        self.assertEqual('\t',
                         PayloadBuilder.get_columns_concat(columns=columns)[1])
    def test_get_columns_concat_multiple_columns(self):

        columns = ["example_column1", "example_column2", "example_column3"]

        self.assertEqual(
            "concat(example_column1,char(9),example_column2,char(9),example_column3)",
            PayloadBuilder.get_columns_concat(columns=columns)[0])

        self.assertEqual('\t',
                         PayloadBuilder.get_columns_concat(columns=columns)[1])