When we were preparing the conversion to ES modules in 2019, the
primary obstacle was that the Node tests extensively relied on the
ability to reach into modules and mutate their CommonJS exports in
order to mock things. ES module bindings are not mutable, so in
commit 173c9cee42 we added
babel-plugin-rewire-ts as a kludgy transpilation-based workaround for
this to unblock the conversion.
However, babel-plugin-rewire-ts is slow, buggy, nonstandard,
confusing, and unmaintained. It’s incompatible with running our ES
modules as native ES modules, and prevents us from taking advantage of
modern tools for ES modules. So we want to excise all use of
__Rewire__ (and the disallow_rewire, override_rewire helper functions
that rely on it) from the tests and remove babel-plugin-rewire-ts.
Commits 64abdc199e and
e17ba5260a (#20730) prepared for this by
letting us see where __Rewire__ is being used. Now we go through and
remove most of the uses that are easy to remove without modifying the
production code at all.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Previously, we used to do a kind of "local echo"
whenever the user muted/unmuted a topic. Meaning,
we used to do most of the UI update work before making
the API call to mute the topic, instead of after
receiving the `muted_topics` event. This behavior
has been so since the beginning of time
(b4b6fa14d3) and isn't ideal because:
1. If the request fails on the backend, the UI
could end up in an incorrect state.
2. Adds code complexity.
3. Makes it difficult to catch bugs related to
live-update (like the one fixed by
f725711ff2).
4. Isn't consistent with other parts of the
codebase, which do the UI update while handling
events.
This commit makes it so that all the UI update
work is done only after recieving the `muted_topics`
event.
The only possible issue with this strategy could
be users sending another duplicate request in the small
time span before receiving the event. But that isn't
a big problem, because all requests involved here are
idempotent, and the worst that can happen is a HTTP 400.
Anders Kaseorg
Priyank Patel
Steve Howell
Riken Shah
Abhijeet Prasad Bodas