mock remote data source

remote_data_source_mock_from_json.dart

const String _mockDataJson = 'assets/mock_data/events_spots_localization_mock_data.json';
const int _mockCallMillisecondsDuration = 500;

@Injectable(
  as: RemoteDataSourceMock,
  env: [Flavor.DEVELOP, Flavor.STAGE],
)
class RemoteDataSourceMock implements RemoteDataSource {
  @override
  Future<List<DataModel>> getData({required GeoPoint userLocation}) async =>
      await Future.delayed(Duration(milliseconds: _mockCallMillisecondsDuration))
          .then((_) => File(_mockDataJson)
          .readAsString()
          .then((json) => jsonDecode(json))
          .then((data) => (data as Iterable)
          .map((data) => DataModel.fromJson(data))
          .toList())
      );
  }
  
/// TEST  

void main() {
  group('json decoding', () {
    setUpAll(() => WidgetsFlutterBinding.ensureInitialized());

   test('should decode json', () async {
     //Given
     final fakeUserLocation = GeoPoint(0, 0);
     final mockDataSource = RemoteDataSourceMock();
     //When
     final result = await mockDataSource.getData(userLocation: fakeUserLocation);
     //Then
     expect(result, isList);
   });

    test('return list should not be empty', () async {
      //Given
      final fakeUserLocation = GeoPoint(0, 0);
      final mockDataSource = RemoteDataSourceMock();
      //When
      final result = await mockDataSource.getData(userLocation: fakeUserLocation);
      //Then
      expect(result, isNotEmpty);
    });

    test('should map json to Spot Location Model', () async {
      //Given
      final fakeUserLocation = GeoPoint(0, 0);
      final mockDataSource = RemoteDataSourceMock();
      //When
      final responseData = await mockDataSource.getData(userLocation: fakeUserLocation);
      final result = responseData.every((element) => element is DataModel);
      //Then
      expect(result, isTrue);
    });
  });
}