code: @Et("Je vérifie le message '(.*)' sur l'alerte")
      @And("I check message '(.*)' on alert")
      public void checkAlert(String messageOrKey) throws TechnicalException, FailureException {
          final String message = Context.getValue(messageOrKey) != null ? Context.getValue(messageOrKey) : messageOrKey;
          final String msg = getAlertMessage();
          if (msg == null || !msg.equals(message)) {
              new Result.Failure<>(msg, Messages.format(Messages.getMessage(Messages.FAIL_MESSAGE_NOT_FOUND_ON_ALERT), message), false, Context.getCallBack(Callbacks.RESTART_WEB_DRIVER));
          }
      }
docs: Checks that a given page displays a html alert with a message.
  
  @param messageOrKey
  Is message (message or message in context (after a save)) displayed on html alert
  @throws FailureException
  if the scenario encounters a functional error
  @throws TechnicalException
  is throws if you have a technical error (format, configuration, datas, ...) in NoraUi.
  Exception with message and with screenshot and with exception if functional error but no screenshot and no exception if technical error.