[flutter_login_unit_test] AuthenticationBloc Tests

authentication_bloc_test.dart

import 'package:flutter_test/flutter_test.dart';

import 'package:mockito/mockito.dart';
import 'package:user_repository/user_repository.dart';

import 'package:flutter_login/authentication/authentication.dart';

class MockUserRepository extends Mock implements UserRepository {}

void main() {
  AuthenticationBloc authenticationBloc;
  MockUserRepository userRepository;

  setUp(() {
    userRepository = MockUserRepository();
    authenticationBloc = AuthenticationBloc(userRepository: userRepository);
  });
  
  tearDown(() {
    authenticationBloc?.close();
  });

  test('initial state is correct', () {
    expect(authenticationBloc.initialState, AuthenticationUninitialized());
  });

  test('close does not emit new states', () {
    expectLater(
      authenticationBloc,
      emitsInOrder([AuthenticationUninitialized(), emitsDone]),
    );
    authenticationBloc.close();
  });
}