// Execute
        final InvalidQueryException npeException = new InvalidQueryException(messageCode, message, npeCause);
        final InvalidQueryException iseException = new InvalidQueryException(messageCode, message, iseCause);
        final InvalidQueryException oomException = new InvalidQueryException(messageCode, message, oomCause);

        // Verify different cause types are handled

        final VaMessenger<FessMessages> messageCode = messages -> messages.addErrorsSsoLoginError(UserMessages.GLOBAL_PROPERTY_KEY);

        // Execute
        final SsoMessageException exception = new SsoMessageException(messageCode, message);

        // Verify
        assertNotNull(exception);
        assertEquals("", exception.getMessage());
        assertEquals(messageCode, exception.getMessageCode());
    }

    /**
     * Outputs a log entry.
     *
     * @param messageCode
     *            Message code. Must not be {@literal null} or empty string.
     * @param args
     *            Arguments
     */
    public void log(final String messageCode, final Object... args) {
        assertArgumentNotEmpty("messageCode", messageCode);

        log(format(messageCode, args));
    }

    /**
     * Outputs a log entry.

   * be non-null.
   *
   * If the exchange was canceled or timed out, this will wrap [e] in an exception that provides
   * that additional context. Otherwise [e] is returned as-is.
   */
  internal fun messageDone(
    exchange: Exchange,
    requestDone: Boolean = false,
    responseDone: Boolean = false,
    e: IOException?,
  ): IOException? {