APIs Used

Get news feed sample:

https://api.npoint.io/446ca19879714134da9a

Tech Stack & Details

• Kotlin
• MVVM Clean Architecture
• Dagger Hilt for Dependency Injection
• Kotlin Coroutines
• Kotlin Flows
• Room
• Navigation Arch Components
• Retrofit
• Coil for Image Loading
• Truth, Mockito for Unit Testing

Communication between layers

• UI calls method from ViewModel.
• ViewModel executes required Use case.
• Use cases gets data from Repository based on internet availability.
• Repository can return data from local/remote datasource w/o internet it fetches from local and from remote if internet is present.
• If internet is not present or data is not cached user is show a retry screen to Retry.
• Information flows back to the UI where we display the results in RecyclerView.

Testing strategy :

1. Write unit tests for ViewModel.
2. Write unit tests for UseCases.
3. Write unit tests for Repository.
4. Write unit tests for DataSources.

Things that can be improved :

1. Return cached data in case of API/Server errors.
2. Notify user that you are seeing cached data please connect to internet if user's internet is not available and results were returned from local data source.