TnResultSetHandlerFactory result = invokerAssistant.assistResultSetHandlerFactory();
        assertNull(result);
    }

    // Test assistRelationOptionalFactory
    @Test
    public void test_assistRelationOptionalFactory() {
        RelationOptionalFactory result = invokerAssistant.assistRelationOptionalFactory();
        assertNull(result);
    }

    // Test assistSqlAnalyzerFactory
    @Test