suggestion: example unit tests (not widget-based) in the testing docs, & using streams, also Mockito and Mocktail examples

[lorriman]

May I suggest expanding the testing docs at https://riverpod.dev/docs/cookbooks/testing/ to cover more cases.

Eg, I have a repository that has fetch methods that do not return data themselves but via stream getters. Firstly I don't want to test via widgets but test the repository directly, secondly I am unsure how to handle the streams. The easy part is replacing the service api the repository uses with a mocked one, but after that I'm on my own (I'm sure I can work it out but example code would make things so much easier).

Also example tests using the notifiers would be great.

(I can see a couple of previous question related to this, but here I am just suggesting expanding the testing docs.)

Also Mockito and Mocktail samples would be fantastic.