helper.duplicateHostList = null;

        String url = "http://test.com";
        String result = helper.convert(url);

        assertNotNull(result);
        assertNotNull(helper.duplicateHostList);
    }

    public void test_convert_emptyList() {
        DuplicateHostHelper helper = new DuplicateHostHelper();
        helper.duplicateHostList = new ArrayList<>();

        assertEquals("User is not found: ******@****.***", exception.getMessage());
        assertNull(exception.getCause());
    }

    public void test_constructor_withLongUsername() {
        // Test with a very long username
        String username = "verylongusername".repeat(10);
        FessUserNotFoundException exception = new FessUserNotFoundException(username);

        assertNotNull(exception);

        assertNotNull(badRequestResult);

        // Test UNAUTHORIZED status
        ApiResult unauthorizedResult = new ApiResult.ApiResponse().status(Status.UNAUTHORIZED).result();
        assertNotNull(unauthorizedResult);

        // Test FAILED status
        ApiResult failedResult = new ApiResult.ApiResponse().status(Status.FAILED).result();
        assertNotNull(failedResult);

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

    public void test_constructor_withNullCause() {
        // Test constructor with null cause
        final JobProcessingException exception = new JobProcessingException((Throwable) null);

        assertNotNull(exception);
        assertNull(exception.getCause());

        // Test that multiple instances can be created independently
        CrawlerEngineClient client1 = new CrawlerEngineClient();
        CrawlerEngineClient client2 = new CrawlerEngineClient();

        assertNotNull(client1);
        assertNotNull(client2);
        assertNotSame(client1, client2);
    }

    // Test constructor with different thread context
    public void test_constructorInDifferentThread() throws Exception {

        String name = "paramName";
        String[] values = { "value1", "value2", "value3" };
        RequestParameter param = new RequestParameter(name, values);

        assertEquals(name, param.getName());
        assertNotNull(param.getValues());
        assertEquals(3, param.getValues().length);
        assertEquals("value1", param.getValues()[0]);
        assertEquals("value2", param.getValues()[1]);

        assertNotNull(toString);
        assertTrue(toString.contains("CurlException"));
        assertTrue(toString.contains(message));
    }

    @Test
    public void testStackTrace() {
        CurlException exception = new CurlException("Test message");
        StackTraceElement[] stackTrace = exception.getStackTrace();

        assertNotNull(stackTrace);

        // Test getEntries method
        FileEntry[] entries = msrpcShareEnum.getEntries();

        assertNotNull(entries);
        assertEquals(2, entries.length);

        // Verify the first entry
        FileEntry entry1 = entries[0];
        assertNotNull(entry1);
        assertEquals("Share1", entry1.getName());
        assertEquals(8, entry1.getType()); // TYPE_SHARE constant

        // When
        byte[] nonce1 = context.generateSecureNonce();
        byte[] nonce2 = context.generateSecureNonce();

        // Then
        assertNotNull(nonce1, "First secure nonce should not be null");
        assertNotNull(nonce2, "Second secure nonce should not be null");
        assertFalse(Arrays.equals(nonce1, nonce2), "Secure nonces should be different");

        StackTraceElement[] originalStackTrace = exception.getStackTrace();
        assertNotNull(originalStackTrace);

        Throwable filled = exception.fillInStackTrace();
        assertSame(exception, filled);

        StackTraceElement[] newStackTrace = exception.getStackTrace();
        assertNotNull(newStackTrace);
    }

    public void test_multipleInstances() {