UserManager不在单元测试中创建用户

时间:2019-03-22 06:03:30

标签: unit-testing asp.net-core asp.net-identity moq xunit

我正在使用xUnit&Moq,我通常要实现的目的是创建身份用户,以便将其存储在Entity Framework内存中数据库中。

我已经建立了种子数据功能-当我的ASP.NET Core主机应用程序启动并且可以完美运行时会触发它-没问题。

但是,当我使用模拟的UserManager时,就会发生此问题。没有抛出异常,只是没有保存用户。

在调试测试时进行验证,DbContext返回0个用户,UserManager.FindByNameAsync也会产生null

我想知道是什么原因。可能是由于我在SeedDataTest类的构造函数中组装UserManager的方式造成的吗?

public class SeedDataTest
{
    private AppDbContext dbContext;
    private UserManager<ApplicationUser> userManager;
    private ITenantService tenantService;

    public SeedDataTest()
    {
        var options = new DbContextOptionsBuilder<AppDbContext>()
            .UseInMemoryDatabase(databaseName: "in_memory_db")
            .Options;

        dbContext = new AppDbContext(options);

        var userStore = new UserStore<ApplicationUser>(dbContext);

        userManager = new Mock<UserManager<ApplicationUser>>(
            userStore,
            new Mock<IOptions<IdentityOptions>>().Object,
            new Mock<IPasswordHasher<ApplicationUser>>().Object,
            new IUserValidator<ApplicationUser>[0],
            new IPasswordValidator<ApplicationUser>[0],
            new Mock<ILookupNormalizer>().Object,
            new Mock<IdentityErrorDescriber>().Object,
            new Mock<IServiceProvider>().Object,
            new Mock<ILogger<UserManager<ApplicationUser>>>().Object)
            .Object;

        tenantService = new Mock<TenantService>(dbContext).Object;
    }

    [Fact]
    public void Test1()
    {
        new TenantsCreator(dbContext).Create();
        new UserCreator(dbContext, tenantService, userManager).Create(); // stuck here
        new MembershipCreator(dbContext, userManager).Create();

        // unfinished
    }
}

这是UserCreator

中的代码
public class UserCreator
{
    private AppDbContext _context;
    private ITenantService _tenantService;
    private UserManager<ApplicationUser> _userManager;

    public UserCreator(
        AppDbContext context,
        ITenantService tenantService,
        UserManager<ApplicationUser> userManager
        )
    {
        _context = context;
        _tenantService = tenantService;
        _userManager = userManager;
    }

    public void Create()
    {
        Task.Run(async () => await CreateUsers()).ConfigureAwait(false).GetAwaiter().GetResult();
    }

    private async Task CreateUsers()
    {
        ApplicationUser hostAdminUser = _context.Users.FirstOrDefault(x => x.UserName.Equals(SetupConsts.Users.AdminJoe.UserName));

        if (hostAdminUser == null)
        {
            hostAdminUser = new ApplicationUser()
            {
                FirstName = SetupConsts.Users.AdminJoe.FirstName,
                LastName = SetupConsts.Users.AdminJoe.LastName,
                UserName = SetupConsts.Users.AdminJoe.UserName,
                Email = SetupConsts.Users.AdminJoe.Email,
                EmailConfirmed = true,
                PasswordHash = new PasswordHasher<ApplicationUser>().HashPassword(hostAdminUser, SetupConsts.Users.Passwords.Default)
            };

            await _userManager.CreateAsync(hostAdminUser);
        }

        ApplicationUser secondaryUser = _context.Users.FirstOrDefault(x => x.UserName.Equals(SetupConsts.Users.JohnRoe.UserName));

        if (secondaryUser == null)
        {
            secondaryUser = new ApplicationUser()
            {
                FirstName = SetupConsts.Users.JohnRoe.FirstName,
                LastName = SetupConsts.Users.JohnRoe.LastName,
                UserName = SetupConsts.Users.JohnRoe.UserName,
                Email = SetupConsts.Users.JohnRoe.Email,
                EmailConfirmed = true,
                PasswordHash = new PasswordHasher<ApplicationUser>().HashPassword(secondaryUser, SetupConsts.Users.Passwords.Default)
            };

            await _userManager.CreateAsync(secondaryUser);
        }
    }
}

1 个答案:

答案 0 :(得分:1)

我们使用模拟框架来建立模拟(替代)依赖关系,并指定在SUT中使用的类/接口返回的内容。

一个很好的用例是数据库本身。在测试对象时,我们总是想知道对象的确切状态,而这样做的唯一方法是自己表达对象的内容。

这是Moq的用武之地。它的功能之一是允许我们陈述方法调用的结果。

我认为您正在返回0个结果,因为您使用的是类的最小量实现(实际上并没有调用实现的类)。为了获得结果,您将需要进行一些设置:

mockedClass.Setup(x => x.GetUserDetails(It.IsAny<int>())).Returns(new UserDetails());

以这种方式进行操作,或者确保您传递的是UserManager类的具体实现,而不是模拟版本:

 userManager = new UserManager<ApplicationUser>

希望有帮助