Because if it's like this, if for instance I have a CoroutineDispatcher injected that is the IO and ...

# coroutines

[Pablo]

Because if it's like this, if for instance I have a CoroutineDispatcher injected that is the IO and the CoroutineScope tha tis the MainScope() and I use it like :

@Inject constructor(
...
...
private val mainScope : CoroutineScope,
private val ioDispatcher: CoroutineDispatcher,
...
...
)

And then using it like this

mainScope.launch{
  ...
  result withContext(ioDispatcher) {...}
  ...
}

If I do Dispatchers.setMain(TestCoroutineDispatcher()) does it change also the ioDispatcher ?
On my test I'm doing it like this :

private val testDispatcher = TestCoroutineDispatcher()
private val mainScope = TestCoroutineScope(testDispatcher)

And then on the @Before I'm using this Dispatchers.setMain(testDispatcher)
And on every test I'm using

mainScope.runBlockingTest{...}
or
testDispatcher.runBlockingTest{...}

Is something I could improve?

[gildor]

does it change also the ioDispatcher

No, there is no such mechanism for other dispatchers

[gildor]

private val testDispatcher = TestCoroutineDispatcher()

private val mainScope = TestCoroutineScope(testDispatcher)

It’s redundant, you can just use TestCoroutineScope()

[Pablo]

Sorry Andrey, I was reading again and what you think is redundant I got it, but it is a problem with my DI? I mean I have an inject for the CoroutineScope and one for the CoroutineDispatcher so that's why on my test I create both to pass them as a parameter, is that ok?

[Pablo]

What I mean is on my test I have to create my presenter and now I was doing this :

private val testDispatcher = TestCoroutineDispatcher()
private val mainScope = TestCoroutineScope(testDispatcher)

...
presenter(...,mainScope,testDispatcher)

This is still redundant?

[gildor]

If your dispatcher argument is something like ioDispatcher, so it explicitly requests some dispatcher to manage IO, then it's not redundant

[gildor]

But most of code, which doesn't require CPU or IO related dispatchers explicitly, probably could work only with scope

[Pablo]

On my presenter you mean? I'm injecting CoroutineScope as MainScope() and CoroutineDispatcher as Dispatchers.IO so, I show the progress in the main thread and then change it to IO to do api request and go back to main

[gildor]

Yep, makes sense to inject IO separately, if you need it, but not for api request

[gildor]

Api request should be already run on 9wn thread what kind http client do you use?

[Pablo]

Still with some doubts about that check my last message please @gildor :((

[gildor]

what kind doubts?

[Pablo]

I've asked another question on the bottom of the channel see please