This run_test helper sets up a convention that allows
us to give really short tracebacks for errors, and
eventually we can have more control over running
individual tests. (The latter goal has some
complications, since we often intentionally leak
setup in tests.)
This commit exposes some inner variables of notifications.js to make
them easily testable. The first test added simply checks whether the
showing and closing of notifications works properly, and doesn't yet
verify the main code logic of the notification generation.
We create a node unit test,
with 'muting' and 'stream_data' modules as dependencies,
to test the logic in notifications.message_is_notifiable.
Part of #2945
Steve Howell
Tim Abbott
Rohitt Vashishtha
Catherine Kleimeier