@Test
    public void test_assistCurrentDBDef() {
        DBDef result = invokerAssistant.assistCurrentDBDef();
        assertNull(result);
    }

    // Test assistDataSource
    @Test
    public void test_assistDataSource() {
        DataSource result = invokerAssistant.assistDataSource();
        assertNull(result);
    }

    // Test assistDBMetaProvider
    @Test
    public void test_assistDBMetaProvider() {