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

);
            """,
        "bq_ddl": {
            DdlParse.NAME_CASE.original:
                """\
                #standardSQL
                CREATE TABLE `project.dataset.Test_Table`
                (
                  Col_01 STRING NOT NULL,
                  Col_02 STRING NOT NULL,
                  Col_03 ARRAY,
                  Col_04 ARRAY>>,
                  Col_05 ARRAY>>>>,
                  Col_06 ARRAY
                )""",
            DdlParse.NAME_CASE.lower:
                """\
                #standardSQL
                CREATE TABLE `project.dataset.test_table`
                (
                  col_01 STRING NOT NULL,
                  col_02 STRING NOT NULL,
                  col_03 ARRAY,
                  col_04 ARRAY>>,
                  col_05 ARRAY>>>>,
                  col_06 ARRAY
                )""",
            DdlParse.NAME_CASE.upper:
                """\
                #standardSQL
                CREATE TABLE `project.dataset.TEST_TABLE`
                (

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])