### Question:
JdbcUtils { static DbTypeParser getDbTypeParser() { if (dbTypeParser == null) { synchronized (JdbcUtils.class) { if (dbTypeParser == null) { String sqlparserType = ConfigurationFactory.getInstance().getConfig(ConfigurationKeys.SQL_PARSER_TYPE, SqlParserType.SQL_PARSER_TYPE_DRUID); dbTypeParser = EnhancedServiceLoader.load(DbTypeParser.class, sqlparserType); } } } return dbTypeParser; } private  JdbcUtils(); static String getDbType(String jdbcUrl); static void initDataSourceResource(BaseDataSourceResource dataSourceResource, DataSource dataSource, String resourceGroupId); static void initXADataSourceResource(BaseDataSourceResource dataSourceResource, XADataSource dataSource, String resourceGroupId); static String buildResourceId(String jdbcUrl); static Driver loadDriver(String driverClassName);  }### Answer:
@Test public void testDbTypeParserLoading() { DbTypeParser dbTypeParser = JdbcUtils.getDbTypeParser(); Assertions.assertNotNull(dbTypeParser); }