Reputation: 1750
While unit testing by mocking secure storage using mockito this appears. any help?
package:flutter_secure_storage/flutter_secure_storage.dart 82:19 MockFlutterSecureStorage.read
package:some_pack/storage/secure_preferences.dart 37:48 SecureStorage.getToken
test\storage\secure_preferences_test.dart 21:27 main.<fn>.<fn>
test\storage\secure_preferences_test.dart 17:29 main.<fn>.<fn>
type 'Null' is not a subtype of type 'Future<String?>'
Sample code
TestWidgetsFlutterBinding.ensureInitialized();
MockFlutterSecureStorage mockFlutterSecureStorage =
MockFlutterSecureStorage();
SecureStorage secureStorage =
SecureStorage(flutterSecureStorage: mockFlutterSecureStorage);
group('token', () {
test('when getToken()', () async {
// Given
// When
await secureStorage.getToken();
// Then
verify(mockFlutterSecureStorage.read(key: "com.xdev.token_key"));
});
where
class MockFlutterSecureStorage extends Mock implements FlutterSecureStorage {}
Upvotes: 1
Views: 442
Reputation: 1508
your problem is with null-safety. some additional steps are added to mockito
due to null-safety migration. have a look here: https://github.com/dart-lang/mockito/blob/master/NULL_SAFETY_README.md
Upvotes: 1