mvvm-arch-sample

[WORK-IN-PROGRESS]

• Less boilerplate code
• Easy to read
• Testable (Unit and Instrumantation)
• Modularized by layer (Feature modules coming soon)

Architecture

What is used?

• JetPack ViewModel/LiveData
• Coroutines
• Koin
• DataBinding
• Unit Tests
• Instrumentation Tests
• Jacoco test coverage

Samples

Calling an api service (Errors are handled in base classes)

MainViewModel.kt

fun fetchItems() {
    callService({ repo.getAlbums() }, {
        albumsLive.postValue(it)
    })
}

MainRepositoryImpl.kt

override suspend fun getAlbums() = apiWrapper { api.getAlbums() }}

Calling an api service with overrided error case

fun fetchItems() {
    callService({ repo.getAlbums() },
        success = {
            albumsLive.postValue(it)
        },
        failure = {
            if (it is AError.Authorization) {
                // clear token
            } else {
                postError(it)
            }
        }
    )
}

Testing

• All business logic is kept in ViewModels. Trying to keep ViewModel coverages near 100%.
• All network cases also tested with ApiWrapperTest

• Ui bound cases and view classes are tested with Espresso.

Todos

• At least 2 screens with more interaction
• Navigation
• Feature modules
• Easy and readeble Espresso tests with Robot pattern
• Github actions