b15cd9d29f
* MM-41565,MM-42473: fixes incorrect unread thread count The infamous "-1 unread threads" bug, was due to incorrectly counting previous unread mentions and replies. When we calculate the previous counts, we didn't take into account if a thread was newly followed one or not. So when a user gets added to a thread via a mention receives a WS event with the previous count values calculated by subtracting "1" from the current count values. In the result the webapp subtracts the previous values for the thread from the total values of all threads for the user. This is wrong since the user just followed the thread those previous values should be 0. Which results into showing a negative value of unread threads to the user. This commit fixes this issue by zeroing the previous count values when the user was not following the thread previously. * Adds test, and addresses comments * Changes test's description * Removes unneeded assertion * Empty commit just to re-build
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