The most common thing that we do with fab! is:
fab!(:thing) { Fabricate(:thing) }
This commit adds a shorthand for this which is just simply:
fab!(:thing)
i.e. If you omit the block, then, by default, you'll get a `Fabricate`d object using the fabricator of the same name.
Why was the test flaky?
The test relied on the fact that visiting a topic would marked its
post as unread. However, we did not actually stay on the topic long
enough in some cases for it to be considered read based on the logic in
our client side code.
This commit fixes the flakiness by ensuring that the post has actually
been read before navigating away.
There is a problem that unread and new count is not updated to reflecting topicTrackingState.
It is because discourseComputed on Category is not working properly with topicTrackingState. Moving it to component level is making counter reliable.
