Correct me if I'm wrong, but usage of

fun CoroutineScope.foo()

basically kills the usage of Mockito in my project, right? It has some support for suspended functions, but not extensions. So,

mockk

is the only answer or there are workarounds? That's quite a change for a big codebase...

basically kills the usage of Mockito in my project, right

depends on whether this function is a member in some class (e.g.

class Foo { fun CoroutineScope.bar() {}

) or a top-level function. Mockito works only for members

Yes, it is a member of some enclosing class. Do you have an example on how to mock and verify the

bar()

from your snippet?