static apiTestNotifier (req, res) {
    function continueProcess (err, notifierName) {
      if (err) {
        return res.serverError(500, `Error testing alert: ${err}`);
      }

      return res.send(JSON.stringify({
        success: true,
        text: `Successfully issued alert using the ${notifierName} notifier.`
      }));
    }

    Notifier.issueAlert(req.params.id, `Test alert from ${req.user.userId}`, continueProcess);
  }
POST - /api/notifier/:id/test

Tests an existing notifier (admin only).
@name /notifier/:id/test
@returns {boolean} success - Whether the test notifier operation was successful.
@returns {string} text - The success/error message to (optionally) display to the user.