assertFalse(emptyGenerator.generate("thumbnailId", null));
        assertFalse(emptyGenerator.generate(null, null));
    }

    @Test
    public void test_destroy() {
        // Initialize without container
        emptyGenerator = new EmptyGenerator();

        // Test that destroy method can be called without error
        emptyGenerator.destroy();

    }

    @Test
    public void test_isAvailable() {
        // Test availability check
        assertTrue(thumbnailGenerator.isAvailable());
    }

    @Test
    public void test_destroy() {
        // Test destroy method - should not throw exception
        thumbnailGenerator.destroy();
        // After destroy, generator should not be available
        assertFalse(thumbnailGenerator.isAvailable());

            }
        };

        // Should not throw any exception
        webApiFilter.init(filterConfig);
        assertTrue(true);
    }

    // Test destroy method
    @Test
    public void test_destroy() {
        // Should not throw any exception
        webApiFilter.destroy();
        assertTrue(true);
    }

    // Test doFilter when WebApiManagerFactory returns null WebApiManager
    @Test

        assertFalse(generator.isGenerateCalled());
        assertTrue(generator.generate("id123", outputFile));
        assertTrue(generator.isGenerateCalled());
    }

    @Test
    public void test_destroy() {
        // Test destroy method is called correctly
        generator = new TestThumbnailGenerator();

        assertFalse(generator.isDestroyCalled());
        generator.destroy();

        } catch (Exception e) {
            fail("Unexpected exception: " + e.getMessage());
        }
    }

    @Test
    public void test_destroyProcess_withRunningProcess() {
        String sessionId = "test_destroy";
        // Use sleep command that runs longer so we can verify it's running
        List<String> cmdList = Arrays.asList("sleep", "10");
        Consumer<ProcessBuilder> pbCall = pb -> {

        // The process method needs actual ThumbnailQueueBhv and other components
        assertTrue(true);
    }

    // Test destroy
    @Test
    public void test_destroy() {
        thumbnailManager.destroy();
        assertFalse(thumbnailManager.generating);
    }

    // Test purge with expired files
    @Test

        final long currentTime = systemHelper.getCurrentTimeAsLong();
        final long now = System.currentTimeMillis();
        assertTrue(Math.abs(currentTime - now) < 1000);
    }

    @Test
    public void test_destroy() {
        final AtomicReference<Boolean> hookExecuted = new AtomicReference<>(false);
        systemHelper.addShutdownHook(() -> hookExecuted.set(true));
        systemHelper.destroy();