Has anyone successfully used a unit testing mockin...

# multiplatform

[Janelle Fullen]

Has anyone successfully used a unit testing mocking library that works well with MPP? Looking for one.

[Kris Wong]

mockk. though frankly I found it to only handle basic use cases

[Janelle Fullen]

Can you give a little more detail about what works with mockk? Do spies and class mocks work?

[Kris Wong]

to some degree. I recommend you take the time to investigate it.

[Matt Toal]

It looks like it doesn't support ios mocks at all (and maybe struggles with js tests?) https://github.com/mockk/mockk/issues/58

[Kris Wong]

hmm, for some reason I had in my head that it supported k/n

[Arkadii Ivanov]

There is no mocking in kn currently, AFAIK. I switched completely to fakes, even in pure Android projects. I recommend this article: https://medium.com/@june.pravin/mocking-is-not-practical-use-fakes-e30cc6eaaf4e

[Kris Wong]

Personally, I prefer to use DI/SL to swap out test implementations. It seems to work fairly well.

[Kurt Renzo Acosta]

@Arkadii Ivanov by any chance, do you have a project sample with testing using fakes?

[Arkadii Ivanov]

@Kurt Renzo Acosta nothing open at the moment. But there is nothing special. Just abstract dependencies with interfaces and provide test implementations that simulate real ones. Interface segregation principle and functional interfaces really help here.

[Arkadii Ivanov]

I'm going to cover this topic in part 3 of my article series: https://badootech.badoo.com/mvi-in-kotlin-multiplatform-part-1-1-of-3-205c6feb4ac7?source=friends_link&sk=0fbf033393db72797fcbb6b0e0d5c320

[Kurt Renzo Acosta]

Great! Looking forward to it. We have some fakes at the moment but I feel like we could do better