Hi guys 👩‍💻 looking for some testing advices i want to create my first

androidTest

and im having some problems trying to mock the ViewController of my view, maybe im doing something working but i would like to test only the view without the view controller (i already have the Unit test for my view controller) how would you do it using hilt and compose-navigation (

HiltAndroidTest

)

I usually make another composable, that doesn't require controller as a parameter. For example

fun LoginScreen(vm: LoginViewModel = hiltViewModel(), onPopBack: () -> Unit) {
    val state by vm.anyState.collectAsState()
    LoginView(state, onPopBack)
}

// Test this
fun LoginView(anyStateFromVM: ?, onPopBack: () -> Unit) {
    // ...
}

would you also pass the functions and state needed on the view e.g

doLogin: vm.doLogin...

?

Yeah, pass all the state, that is provided by VM and expose all callbacks that call VM functions

LoginView(state, onPopBack, onLogin: vm::onLogin)

nice, ill try to implement something similar thanks peter 🙂

But you still miss a bit of test coverage, if you test it without VM. In my example LoginScreen isn't tested

i have a unit test for the VM that one covers the logic there

tough you can always make an instance of LoginViewModel, by simply call constructor

LoginViewModel()

, you don't need to call

hiltViewModel<LoginViewModel>()

that could be a bit more complex since i have @inject props coming from hilt i would need to create one VM with mock props 🤔 dont you think?

yeah, exactly