我有以下代码.我正在尝试为创建用户运行测试用例.以下是我到目前为止尝试过的内容.
I have following code. Im trying to running a test case for create user.Following is what i have tried so far.
public class CreateUserCommandHandlerTest { private Mock<UserManager<ApplicationUser>> _userManager; private CreateUserCommandHandler _systemUnderTest; public CreateUserCommandHandlerTest() { _userManager = MockUserManager.GetUserManager<ApplicationUser>(); var user = new ApplicationUser() { UserName = "ancon1", Email = "ancon@mail", RoleType = RoleTypes.Anonymous }; _userManager .Setup(u => u.CreateAsync(user, "ancon2")).ReturnsAsync(IdentityResult.Success); _systemUnderTest = new CreateUserCommandHandler(_userManager.Object); } [Fact] public async void Handle_GivenValidInput_ReturnsCreatedResponse() { var command = new CreateUserCommand { Username = "ancon1", Email = "ancon@mail", Password = "ancon2", RoleType = RoleTypes.Anonymous }; var result = await _systemUnderTest.Handle(command, default(CancellationToken)); Assert.NotNull(result); Assert.IsType<Application.Commands.CreatedResponse>(result); } }我的用户经理在这里:
public static class MockUserManager { public static Mock<UserManager<TUser>> GetUserManager<TUser>() where TUser : class { var store = new Mock<IUserStore<TUser>>(); var passwordHasher = new Mock<IPasswordHasher<TUser>>(); IList<IUserValidator<TUser>> userValidators = new List<IUserValidator<TUser>> { new UserValidator<TUser>() }; IList<IPasswordValidator<TUser>> passwordValidators = new List<IPasswordValidator<TUser>> { new PasswordValidator<TUser>() }; userValidators.Add(new UserValidator<TUser>()); passwordValidators.Add(new PasswordValidator<TUser>()); var userManager = new Mock<UserManager<TUser>>(store.Object, null, passwordHasher.Object, userValidators, passwordValidators, null, null, null, null); return userManager; } }我的命令处理程序是这样的:
and my Command handler is this:
public class CreateUserCommandHandler : IRequestHandler<CreateUserCommand, BaseCommandResponse> { private readonly UserManager<ApplicationUser> _userManager; public CreateUserCommandHandler(UserManager<ApplicationUser> userManager) { _userManager = userManager; } public async Task<BaseCommandResponse> Handle(CreateUserCommand createUserCommand, CancellationToken cancellationToken) { var user = new ApplicationUser { UserName = createUserCommand.Username, Email = createUserCommand.Email, RoleType = createUserCommand.RoleType }; var result = await _userManager.CreateAsync(user, createUserCommand.Password); if (result.Succeeded) { return new CreatedResponse(); } ErrorResponse errorResponse = new ErrorResponse(result.Errors.Select(e => e.Description).First()); return errorResponse; } }当我运行测试时,它失败并说对象引用未设置为对象的瞬间".
when i'm running my test it fails and saying Object reference not set to an instant of an object.
我在这里做错什么了吗?
What am i doing wrong here??
推荐答案我知道这已经有几个月了,但我还是回到了这个话题上.我将就这个主题扩展自己的答案,因为仅指向Haok的GitHub示例就好像说:读一本书",因为它很大.它没有查明问题和您需要执行的操作.您需要隔离一个Mock对象,但不仅如此,还需要设置""CreateAsync"的方法.因此,我们将其分为三个部分:
I know this is months old but I keep getting back to this thread. I will extend my own answer on this topic because just pointing to Haok's GitHub example is like saying: "Read a book" as it is huge. It does not pinpoint the issue and what you need to do. You need to isolate a Mock object, but not only that but also you need to 'Setup' the method for 'CreateAsync'. So let's put this in three parts:
所以说我有一个用于返回模拟的UserManager的辅助方法.与Haok代码稍有不同:
So say I have a helper method for returning a Mocked UserManager. Which is just slightly altered from the Haok code:
public static Mock<UserManager<TUser>> MockUserManager<TUser>(List<TUser> ls) where TUser : class { var store = new Mock<IUserStore<TUser>>(); var mgr = new Mock<UserManager<TUser>>(store.Object, null, null, null, null, null, null, null, null); mgr.Object.UserValidators.Add(new UserValidator<TUser>()); mgr.Object.PasswordValidators.Add(new PasswordValidator<TUser>()); mgr.Setup(x => x.DeleteAsync(It.IsAny<TUser>())).ReturnsAsync(IdentityResult.Success); mgr.Setup(x => x.CreateAsync(It.IsAny<TUser>(), It.IsAny<string>())).ReturnsAsync(IdentityResult.Success).Callback<TUser, string>((x, y) => ls.Add(x)); mgr.Setup(x => x.UpdateAsync(It.IsAny<TUser>())).ReturnsAsync(IdentityResult.Success); return mgr; }关键是要注入通用的"TUser",这也是我将要测试的列表.类似于我的示例:
What is key to this is I am injecting a generic 'TUser' that is what I will be testing as well injecting a list of this. Similar to my example of:
private List<ApplicationUser> _users = new List<ApplicationUser> { new ApplicationUser("User1", "user1@bv") { Id = 1 }, new ApplicationUser("User2", "user2@bv") { Id = 2 } }; ... var userManager = IdentityMocking.MockUserManager<ApplicationUser>(_users);然后,最后我要使用与我要测试的实现类似的存储库来测试模式:
Then finally I am testing a pattern with a repository similar to this implementation I want to test:
public async Task<int> CreateUser(ApplicationUser user, string password) => (await _userManager.CreateAsync(user, password)).Succeeded ? user.Id : -1;我这样测试:
[Fact] public async Task CreateAUser() { var newUser = new ApplicationUser("NewUser", "New@test"); var password = "P@ssw0rd!"; var result = await _repo.CreateUser(newUser, password); Assert.Equal(3, _users.Count); }我这样做的关键是不仅我设置"了CreateAsync,而且还提供了一个回调,这样我才能真正看到我注入的列表得到增加.希望这对某人有帮助.
The key to what I did is that not only did I 'Setup' the CreateAsync but I provided a callback so I can actually see my list I inject get incremented. Hope this helps someone.
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