[Polish] Define an injectable connectivity stream
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评估
调研方向
Start with lib/screens/sign_in_screen.dart and inspect how the sign-in button and screen state are built; then review pubspec.yaml and the Flutter test setup. Add the monitor in lib/connectivity/connectivity_monitor.dart and cover its injected stream in test/offline_banner_test.dart. Done means offline shows the banner and disables Sign In, online removes both effects, and the Flutter checks pass.
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描述
What to build
Define the small connection-status interface that the app’s offline banner will use. Tests should be able to send online/offline changes without relying on the phone’s real network.
Files
lib/connectivity/connectivity_monitor.dart(new file)- Starting example: lib/app.dart
Code to add or extend:abstract interface class ConnectivityMonitor { Stream<bool> get online; Future<void> dispose(); }.
Steps
- Add
ConnectivityMonitorwith Stream online and Future dispose(). true means the device has a network connection; it does not guarantee the internet is reachable. - In tests, add
FakeConnectivityMonitorusing StreamController.broadcast(), an online getter and emit(bool). Close the controller in dispose. - Check that emit(false) then emit(true) delivers those values. This issue defines the connection source; the next one adds the real library.
Example
emit(false),emit(true) produces those two events; disposing closes the stream.
Check it works
In test/connectivity/connectivity_monitor_5_test.dart, check the example above and the failure or limit described in the steps. Run flutter test test/connectivity/connectivity_monitor_5_test.dart and flutter analyze.
References
Assign yourself before starting, or comment to claim the issue. Project setup.
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DevDogsUGA/DogPack#131 ·
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