return null;
        }

        @Override
        public void log(String msg) {
        }

        @Override
        public void log(String message, Throwable throwable) {
        }

        @Override
        public String getServerInfo() {
            return null;
        }

        @Override
        public String getInitParameter(String name) {

        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_stackTrace() {
        // Test that stack trace is properly set
        DictionaryException exception = new DictionaryException("Stack trace test");

        try {
            downloadFileFromURL(url, outputFile);
            System.out.println("Done");
            System.exit(0);
        } catch (Throwable e) {
            System.out.println("- Error downloading");
            e.printStackTrace();
            System.exit(1);
        }
    }

        }
    }

    @Test
    public void test_indexFromDocuments() {
        Consumer<Boolean> successCallback = (success) -> {
            assertTrue(success);
        };
        Consumer<Throwable> errorCallback = (error) -> {
            assertNotNull(error);
        };

        try {
            suggestHelper.indexFromDocuments(successCallback, errorCallback);
            assertTrue(true);

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_stackTraceWithCause() {
        // Test that stack trace is properly preserved with cause
        String innerMessage = "Inner exception";

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_stackTrace() {
        // Test that stack trace is generated properly
        LdapConfigurationException exception = new LdapConfigurationException("Stack trace test");

            fail("Should have thrown an exception for unregistered class");
        } catch (Exception e) {
            // Find the root cause - it should be related to unregistered class
            Throwable rootCause = e;
            while (rootCause.getCause() != null && rootCause.getCause() != rootCause) {
                rootCause = rootCause.getCause();
            }
            String message = rootCause.getMessage();

            testTarget.expired();

            // If we get here, the method executed successfully
            assertTrue("expired method executed successfully", true);
        } catch (Throwable t) {
            // In test environments, system monitoring may fail due to missing dependencies
            // or restricted access to system resources. This is acceptable.

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_serialVersionUID() {
        // Test that the exception has a serialVersionUID field
        FessUserNotFoundException exception1 = new FessUserNotFoundException("user1");

        // Verify it's an instance of RuntimeException
        assertTrue(runtimeException instanceof RuntimeException);
        assertTrue(runtimeException instanceof Exception);
        assertTrue(runtimeException instanceof Throwable);
    }

    @Test
    public void test_stackTrace() {
        // Create a ServletException with a specific message
        String errorMessage = "Stack trace test error";