flutter_apod
A simple flutter application featuring Astronomy Picture Of the Day NASA API.
This app showcase:
- A simple ViewModel approach with ChangeNotifier with a separated repository layer (à la clean/hexagonal architecture)
- Injecting dependency with provider
- Running ViewModel test with simulated time with
FakeAsync. So the correct behavior of the ViewModel is tested in a deterministic fashion. - Displaying an "infinite scroll" grid of images
This toy app allowed to uncover a bug in Flutter 2.0.3 : There is a socket leak every time an image cannot be loaded (when an non ok http code is returned). This app has missing days, so a lot of 404 is returned when fetching images. Over time too many sockets are kept opened, and no more requests can be performed.
Getting Started
Just launch the app with :
flutter run
To exhibit the socket leak, run the app and scroll to the bottom, at the end it will have a lot of 404 (files not yet uploaded). At some point no more request can be perfomed, and fails with (on iOS):
dnssd_clientstub deliver_request: socketpair failed 24 (Too many open files)