Is there a way to use

@Inject

on a Kotlin

object

or are my only options to convert it to a

class

or use

@Provides

?

Well the thing is that

objects

live forever and they don't have a constructor. `object`s work like this: Once you call them the first time, they get instantiated and on the moment you access them again, the same created instance is accessed (if we can call it an instance). A short answer to your question would be No, but the thing is that you just don't need to use Dagger to provide or get it. You can of course create a function that provides that thing, but IMO that's an overkill

The reason I asked is that I wanted to use the

object

as a constructor argument (which you can do) so it is a clearly defined dependency of the class. This means it is now something I know needs to be handled during testing (MockK can mock objects, which is nice). However, doing this means that Dagger needs to know how to provide the object. Hence I need to use

@Inject

or

@Provides

.

you can’t use

@Inject

on objects at all. you can however put it in the dagger graph with

@Provides

. Though I’d still recommend implementing an interface as an object and binding the object in the graph as the interface so that you don’t need to depend on fancy mocking tools to test any consumers.