Flutter Test MissingPluginException

Question

Running tests which rely on the SharedPreferences Plugin always result in

MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences) 

My pubspec.yaml

dev_dependencies:   flutter_test:      sdk: flutter  dependencies:   flutter:      sdk: flutter   shared_preferences: 0.2.3 

The code for works fine in the application itself. Am i missing something i need to do in order to run tests which make use of a plugin?

Answer 1

If you're using shared_preferences 0.2.4 and above, use setMockInitialValues:

SharedPreferences.setMockInitialValues({}); // set initial values here if desired 

For earlier versions you can do it manually:

const MethodChannel('plugins.flutter.io/shared_preferences')   .setMockMethodCallHandler((MethodCall methodCall) async {     if (methodCall.method == 'getAll') {       return <String, dynamic>{}; // set initial values here if desired     }     return null;   });