add testing mock

[goxiaoy]

add mock for testing purpose

[mogol]

Hi @goxiaoy
Why is mock implementation needed? doesn't Mockito cover this case?

[goxiaoy]

Because when I try to do unittest within codes rely on this package，error comes with no implementation on this platform, which means on my computer

[goxiaoy]

And it is learned from package shared_preferences

[mogol]

Would it work in your case?

import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:mockito/mockito.dart';
import 'package:test/test.dart';

void main() {
  test('Sample mock', () async {
    final storage = MockStorage();
    when(storage.read(key: 'name')).thenAnswer((_) => Future.value('Stub'));

    final name = await storage.read(key: 'name');
    expect(name, 'Stub');
  });
}

class MockStorage extends Mock implements FlutterSecureStorage{}

[goxiaoy]

It works for me. I am using dependency injection in my flutter project. so it's quite easy for me to replace FlutterSecureStorage to the mock class. But for those who did not, it's hard to replace it.

It's fine to close this PR. Thank you so much for your introduce of mockito.

[tirth-stasis]

Would it work in your case?

import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:mockito/mockito.dart';
import 'package:test/test.dart';

void main() {
  test('Sample mock', () async {
    final storage = MockStorage();
    when(storage.read(key: 'name')).thenAnswer((_) => Future.value('Stub'));

    final name = await storage.read(key: 'name');
    expect(name, 'Stub');
  });
}

class MockStorage extends Mock implements FlutterSecureStorage{}

How to do that for write method?