thumbnailGenerator.destroy();
        // After destroy, generator should not be available
        assertFalse(thumbnailGenerator.isAvailable());
    }

    @Test
    public void test_createTask_withValidParams() {
        // Test task creation with valid parameters
        String path = "/path/to/document.pdf";
        Map<String, Object> docMap = new HashMap<>();
        docMap.put("mimetype", "application/pdf");