Release a null-safe pre-release of bloc_test

[felix-barz-brickmakers]

bloc and flutter_bloc have already been released with a nullsafe version as prerelease. Please create such a prerelease for bloc_test as well, so we can actually upgrade flutter_bloc or bloc and try out nullsafety.

[felangel]

Hi @felix-barz-brickmakers 👋
Thanks for opening an issue!

I'm more or less ready to do so but my hesitation has been due to the breaking changes in mockito's API due to null safety (which bloc_test relies on). I have been experimenting with a different approach to mocks which would avoid relying on manual overrides and code generation that would allow bloc_test to function as it did before but have been hesitant to push this approach because it could potentially create confusion.

I would love to hear everyone's feedback before proceeding either way, thanks! 🙏

[felix-barz-brickmakers]

Both variants have valid points. I might even prefer the second approach, as it seems that the mockito guys haven't really found a nice solution for the core problem yet. I have also hade quite some problems with the generated mocks. But one idea for mocktail: Instead of passing a string to the calls method, use symbols instead: when(cat).calls(#meow) - it looks cleaner and makes it explicit, that method names are required.

[felangel]

@felix-barz-brickmakers I took your suggestion and refactored mocktail to use Symbol (it was implemented like that originally anyway 😅) and you can track the progress at #2067 👍

[felangel]

v8.0.0-nullsafety.0 is now available 🎉