dart - 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;
  });