How to use the ddlparse.ddlparse.DdlParse.NAME_CASE.upper function in ddlparse

def test_bq_ddl(test_case):
    # Get test data
    data = TEST_DATA_DDL[test_case]

    # Parse ddl
    table = DdlParse().parse(data["source_ddl"])

    # Check generate BigQuery DDL statements of DdlParseTable
    assert table.to_bigquery_ddl() == textwrap.dedent(data["bq_ddl"][DdlParse.NAME_CASE.original])
    assert table.to_bigquery_ddl(DdlParse.NAME_CASE.original) == textwrap.dedent(data["bq_ddl"][DdlParse.NAME_CASE.original])
    assert table.to_bigquery_ddl(DdlParse.NAME_CASE.lower) == textwrap.dedent(data["bq_ddl"][DdlParse.NAME_CASE.lower])
    assert table.to_bigquery_ddl(DdlParse.NAME_CASE.upper) == textwrap.dedent(data["bq_ddl"][DdlParse.NAME_CASE.upper])

Col_05 DATETIME NOT NULL,
                  Col_06 BOOL
                )""",
            DdlParse.NAME_CASE.lower:
                """\
                #standardSQL
                CREATE TABLE `project.dataset.test_table`
                (
                  col_01 STRING NOT NULL,
                  col_02 STRING NOT NULL,
                  col_03 INT64,
                  col_04 FLOAT64,
                  col_05 DATETIME NOT NULL,
                  col_06 BOOL
                )""",
            DdlParse.NAME_CASE.upper:
                """\
                #standardSQL
                CREATE TABLE `project.dataset.TEST_TABLE`
                (
                  COL_01 STRING NOT NULL,
                  COL_02 STRING NOT NULL,
                  COL_03 INT64,
                  COL_04 FLOAT64,
                  COL_05 DATETIME NOT NULL,
                  COL_06 BOOL
                )""",
        },
    },
    "datatype_postgres": {
        "source_ddl":
            """