assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that ScriptEngineException is an instance of FessSystemException
        ScriptEngineException exception = new ScriptEngineException("test");

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that ScheduledJobException is instance of FessSystemException
        ScheduledJobException exception = new ScheduledJobException("Test");

        assertEquals(intermediateCause, exception.getCause());
        assertEquals(rootCause, exception.getCause().getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that PluginException is an instance of FessSystemException
        PluginException exception = new PluginException("Test message");

            assertEquals(expectedCause, e.getCause());
            assertEquals(componentName, e.getComponentName());
        }
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that ContainerNotAvailableException is an instance of FessSystemException
        ContainerNotAvailableException exception = new ContainerNotAvailableException("test");

        assertNotNull(exception);
        assertEquals("User is not found: ユーザー名", exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that FessUserNotFoundException is an instance of FessSystemException
        FessUserNotFoundException exception = new FessUserNotFoundException("testuser");

        assertEquals("Not Found: http://example.com/子/ファイル.html Parent: http://example.com/親/ディレクトリ", exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Verify that ContentNotFoundException is an instance of FessSystemException
        String parentUrl = "http://example.com/parent";
        String url = "http://example.com/child";

        assertNotNull(exception);
        assertEquals("", exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that GsaConfigException is an instance of FessSystemException
        GsaConfigException exception = new GsaConfigException("Test");

        assertTrue(exception instanceof FessSystemException);

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_instanceOfFessSystemException() {
        // Test that ThumbnailGenerationException is an instance of FessSystemException
        ThumbnailGenerationException exception = new ThumbnailGenerationException("Test");