assertNotNull(exception.getCause());
        assertEquals(cause, exception.getCause());
        assertEquals("Underlying error", exception.getCause().getMessage());
    }

    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        DictionaryException exception = new DictionaryException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());

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

    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        final JobProcessingException exception = new JobProcessingException((String) null);

        assertNotNull(exception);

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

    public void test_constructor_withNullMessage() {
        // Test with null message
        LdapConfigurationException exception = new LdapConfigurationException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());

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

    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        PluginException exception = new PluginException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());

        UnsupportedSearchException exception = new UnsupportedSearchException(message);

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

    public void test_constructor_withNullMessage() {
        // Test with null message
        UnsupportedSearchException exception = new UnsupportedSearchException(null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());

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

    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        SearchEngineClientException exception = new SearchEngineClientException(null);

        assertNotNull(exception);

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

    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        CommandExecutionException exception = new CommandExecutionException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());

        assertEquals(message, exception.getMessage());
        assertEquals(cause, exception.getCause());
        assertTrue(exception instanceof FessSystemException);
    }

    public void test_constructor_withNullMessage() {
        // Test with null message
        DataStoreException exception = new DataStoreException((String) null);

        assertNotNull(exception);
        assertNull(exception.getMessage());

        assertNotNull(exception.getCause());
        assertEquals(cause, exception.getCause());
        assertEquals("Token validation failed", exception.getCause().getMessage());
    }

    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        SsoLoginException exception = new SsoLoginException(null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());

        assertNotNull(exception.getStackTrace());
        assertTrue(exception.getStackTrace().length > 0);
        assertNull(exception.getCause());
    }

    public void test_constructor_withNullMessage() {
        // Test with null message
        ResultOffsetExceededException exception = new ResultOffsetExceededException(null);

        assertNull(exception.getMessage());