Wrapping fireEvent in act react-native-testing-library

[myou11]

Hi there!

I have been trying to add tests for my project using Realm, jest, and react-native-testing-library. For the most part, I have a set of working tests, but it's taken a lot of trial and error and research to get here. I would like to get some feedback on testing best practices with the Realm library by hearing about experiences of others.

Issue 1:
The tests seem to fail about 1/10 times when I run tests over and over. The failure looks like this: Accessing object of type Session which has been invalidated or deleted. I'm not exactly sure why this error happens (arbitrarily?).

Issue 2:
I have been reading a lot about how act should not be needed for fireEvent from react-native-testing-library since fireEvent is already wrapped with act. However, I've noticed that if I don't wrap my fireEvents that modify Realm state, then my tests are super flaky. Sometimes you run the test and don't get the act warning and other times you do. I assume this is a timing issue as sometimes the Realm state will be updated before the test ends and other times, the Realm will be updated after the test ends.
In addition to this, I notice the tests in this repo for RealmProvider are also wrapping fireEvent in act.
I'm not sure how this extra act wrapping gets rid of the act warning, but it does.

Thank you in advance for any insight!