Description: The Mentions notification is an alert provided by the echo extension that occurs when your username is mentioned by someone else, with a link on any talk page (other than yours). This notification is already turned on by default on every Wikimedia user page. However, if a user wants to get notified about the success or failure of every user he or she has mentioned, the user can do so in the preference section.
I changed my preferences here because I wanted to get notified on every successful and failed mentions, created a new account for testing purposes and mentioned the newly created username in my original MediaWiki page.
Bug: The mentions worked successfully but I didn't get notified about its success as the sender even though I had changed my preferences to allow this feature of receiving notifications on every successful or failed mentions I send. The notification documentation here clearly states that a user is supposed to receive a notification of a failed mention if a mention to another user was not sent and described what can cause a failed mention. Example, if you try to mention a user that does not exist, or you exceed the limit of mentioned users in a single edit (50 on WMF wikis), the mention will not be sent. I tried mentioning a user that doesn't exist on my talk page (this means it wasnt sent) but I didn't get notified about the failure.
In summary, yes the mentions notification itself works, but the users who send the mention are supposed to be notified about its success or failures.
Steps to Reproduce:
- Go to https://www.mediawiki.org or https://en.wikipedia.org
- Make sure you are logged in;
- Click on Preferences
- Go to notifications and select "Successful Mention" and "Failed Mention" from box list;
- Click the "Save" button.
- Mention a username in your talk page or in an edit summary.
- You will not get notified about the success or failure.
- You should've been notified about the success or failure.