test: CI flake in "UpdateMachine.load retries registerQueue on NetworkError"

[chrisbobbe]

Noticed when working on code that's almost definitely unrelated (implementing the web-auth feature):

#600 (comment)

❌ /home/runner/work/zulip-flutter/zulip-flutter/test/model/store_test.dart: UpdateMachine.load retries registerQueue on NetworkError (failed)
  Bad state: Exceeded timeout 1:00:00.000000 while flushing timers
  package:fake_async/fake_async.dart 217:9   FakeAsync.flushTimers.<fn>
  package:fake_async/fake_async.dart 241:21  FakeAsync._fireTimersWhile
  package:fake_async/fake_async.dart 214:5   FakeAsync.flushTimers
  test/fake_async.dart 29:7                  awaitFakeAsync
  test/model/store_test.dart 176:57          main.<fn>.<fn>

[gnprice]

Thanks for spotting this. If that indeed also happens in main, then it's a bug in either the test code, or the code under test, so it'd be good to debug and fix.

[chrisbobbe]

Got this again, this time locally in tools/check, while looking at #587. It didn't appear on a subsequent run.