我在测试零安全性时遇到了麻烦

Question

我试着用dart运行一个测试，并得到以下结果：

类型'Null‘不是'Future>’类型的子类型

login_with_user_test.dart

import 'package:dartz/dartz.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/mockito.dart';
import 'package:ola_desktop/modules/login/domain/entities/login_user.dart';
import 'package:ola_desktop/modules/login/domain/repositories/login_repository.dart';
import 'package:ola_desktop/modules/login/domain/usecases/login_with_user.dart';

class LoginRepositoryMock extends Mock implements LoginRepository {}

main() {
  final repository = LoginRepositoryMock();
  final usecase = LoginWithUserImpl(repository);

  test('Deve retornar um LoginUser', () async {
    // ignore: prefer_const_constructors
    when(repository.login(user: '', password: ''))
        .thenAnswer((_) async => Right(LoginUser.empty()));

    final result = await usecase("gabriel.ribeiro", "123456");
    expect(result, isA<LoginUser>());
  });
}

login_repository.dart

import 'package:dartz/dartz.dart';

import '../entities/login_user.dart';
import '../errors/errors.dart';

abstract class LoginRepository {
  Future<Either<FailureLogin, LoginUser>> login(
      {required String user, required String password});
}

login_with_user.dart

import 'package:dartz/dartz.dart';

import '../entities/login_user.dart';
import '../errors/errors.dart';
import '../repositories/login_repository.dart';

abstract class LoginWithUser {
  Future<Either<FailureLogin, LoginUser>> call(String user, String password);
}

class LoginWithUserImpl implements LoginWithUser {
  final LoginRepository repository;

  LoginWithUserImpl(this.repository);

  @override
  Future<Either<FailureLogin, LoginUser>> call(String user, String password) {
    return repository.login(user: user, password: password);
  }
}

login_user.dart

class LoginUser {
  final String user;
  final String password;

  LoginUser({required this.user, required this.password});

  factory LoginUser.empty() {
    return LoginUser(user: '', password: '');
  }
}

errors.dart

abstract class FailureLogin implements Exception {}

​

​

​

​

Answer 1

下午好！

设法解决，这扩展了模拟是在空安全之前的事情，在空安全之后，这不再起作用。必须使用GenerateMock

类测试

​

​

然后在终端中运行代码以生成类模拟。

flutter pub run build_runner build

Answer 2

我不太确定，但可能是用Either发布的，您能用result.isRight()重写测试代码吗?如果是工作，请重新检查expect(结果，isA()；line )。因为结果可以是右的，也可以是左的，但两者都是类型。

另外，您能检查一下repository.login(user: '', password: '')替换为await repository.login(user: '', password: '')吗？