Hello everyone, can I test my app without Mockito ...

# android

[Hovhannes]

Hello everyone, can I test my app without Mockito and use only Espresso and JUnit?

[escodro]

Sure. Mock is only one type of test double.
In my projects I prefer to use Mocks only for classes that I have no control. For all other classes, I prefer using Fakes.

I strongly recommend reading this article:
https://martinfowler.com/articles/mocksArentStubs.html

[escodro]

Recently I also wrote about not using mocks, based on this article from Fowler and some video discussions with Kent Beck.

https://dev.to/igorescodro/lessons-learned-with-software-testing-19lj

[Hovhannes]

And what are the most popular Testing tools? Mockito, Espresso and JUnit?

[psh]

I am sure there are more, but these 3 come quickly to mind:

• Mockk (https://mockk.io/) handles coroutine testing better than Mockito.
• We use Turbine (https://github.com/cashapp/turbine) for testing our Flows.
• The Room test helper (https://developer.android.com/training/data-storage/room/migrating-db-versions#single-migration-test) is really nice when it comes to database migration testing.

[ursus]

Write your own fakes, don't use mockito, you'll thank me later

[Hovhannes]

@ursus Please, say the advantages of fakes?

[ursus]

With fakes you are asserting end state, which is what matters; not the way you got there (which is what mockito asserts)