Question

我想单元测试我的MyUserService，它包含访问Entity Framework Identity UserManager的MyUserRepository。

但是我在模拟UserManager / UserStore时遇到了麻烦。

使用this和this作为指导，这是我到目前为止所提出的：

[TestMethod]
public async Task FindUserByNameAsync_State_Expectation()
{
    var data = new List<User> 
    {
        new User { UserName = "AAA" }, 
    }.AsQueryable();
    var mockSet = new Mock<DbSet<User>>();
    mockSet.As<IDbAsyncEnumerable<User>>()
        .Setup(m => m.GetAsyncEnumerator())
        .Returns(new TestDbAsyncEnumerator<User>(data.GetEnumerator()));
    mockSet.As<IQueryable<User>>()
        .Setup(m => m.Provider)
        .Returns(new TestDbAsyncQueryProvider<User>(data.Provider));
    mockSet.As<IQueryable<User>>().Setup(m => m.Expression).Returns(data.Expression);
    mockSet.As<IQueryable<User>>().Setup(m => m.ElementType).Returns(data.ElementType);
    mockSet.As<IQueryable<User>>()
        .Setup(m => m.GetEnumerator())
        .Returns(data.GetEnumerator());

    //this obviously doesn't work as userStore doesn't 
    //have a Users property only UserManager does
    var mockUserStore = new Mock<UserStore<User>>()
        .Setup(c => c.Users)
        .Returns(mockSet.Object);
    var repository = new MyUserRepository(mockQueryableUserStore);
    var service = new MyUserService(repository);

    var user = await service.FindUserByNameAsync("AAA");

    Assert.AreEqual("AAA", user.UserName);
}

MyUserService如下所示：

public class MyUserService : IUserService
{
    private readonly IUserRepository _repository;
    public MyUserService(IUserRepository repository)
    {
        _repository = repository;
    }
    public async Task<User> FindUserByNameAsync(string name)
    {
        var user = await _repository.FindUserByNameAsync(name);
        return user;
    }
}

和MyUserRepository一样：

public class MyUserRepository : IUserRepository
{
    private readonly IUserStore<User> _userStore;
    public MyUserRepository(IUserStore<User> userStore)
    {
        _userStore = userStore;
    }
    public async Task<User> FindUserByNameAsync(string name)
    {
        using (var userManager = new UserManager<User>(_userStore))
        {
            return await userManager.FindByNameAsync(name);
        }
    }
}

到目前为止，我还没有将UserManager（或其包装器）传递给更喜欢使用IUserStore接口的MyUserRepository构造函数

我唯一的选择是按照this answer将UserManager包装在一个接口中，并使用它来传递给MyUserRepository构造函数？在我看来应该有一个更清洁的方法来做到这一点？

测试我的Repository类需要模拟Microsoft Entity Framework Identity UserManager

0 个答案: