HttpContext Moq outside of controller in Asp.Net Core - asp.net-core

Question

I want to moq HttpContext in .net core 1.0.0 for test case
Here is my code:
public async Task<string> Login(string email, string password)
{
var result = await _signInManager.PasswordSignInAsync(email, password, false, lockoutOnFailure: false);
if (result.Succeeded)
{
return HttpContext.User.Identity.Name;
}
else
{
return "";
}
}
Here is my test case
[Fact]
public async Task Login()
{
ApplicationUser user = new ApplicationUser() { UserName = "siddhartha#promactinfo.com", Email = "siddhartha#promactinfo.com", Name = "siddhartha" };
await _userManager.CreateAsync(user, "Something#123");
var userAdded = await _userManager.CreateAsync(user);
var result = await Login("siddhartha#promactinfo.com", "Something#123");
Assert.Equal("siddhartha", result);
}
It goes fail, gets error message:
HttpContext must not be null.
Here is my service - startup.cs
public void ConfigureServices(IServiceCollection services)
{
services.AddIdentity<ApplicationUser, IdentityRole>()
.AddEntityFrameworkStores<PromactOauthDbContext>()
.AddDefaultTokenProviders();
services.AddMvc().AddMvcOptions(x => x.Filters.Add(new GlobalExceptionFilter(_loggerFactory)));
}

Answer 1

Without using controller. I have moq HttpContext in .net core. And used HttpContext in repository
Register HttpContext in test case project like this
public void ConfigureServices(IServiceCollection services)
{
var authenticationManagerMock = new Mock<AuthenticationManager>();
var httpContextMock = new Mock<HttpContext>();
httpContextAccessorMock.Setup(x => x.HttpContext.User.Identity.Name).Returns("Siddhartha");
httpContextMock.Setup(x => x.Authentication).Returns(authenticationManagerMock.Object);
var httpContextAccessorMock = new Mock<IHttpContextAccessor>();
httpContextAccessorMock.Setup(x => x.HttpContext).Returns(httpContextMock.Object);
var httpContextMockObject = httpContextAccessorMock.Object;
services.AddScoped(x => httpContextAccessorMock);
services.AddScoped(x => httpContextMockObject);
serviceProvider = services.BuildServiceProvider();
}
Then you will get HttpContext.User.Identity.Name = Siddhartha
public async Task<string> Login(string email, string password)
{
var result = await _signInManager.PasswordSignInAsync(email, password, false, lockoutOnFailure: false);
if (result.Succeeded)
{
return HttpContext.User.Identity.Name;
}
else
{
return "";
}
}

Answer 2

I believe that error is from a null check on the SignInManager's constructor. I cant see how you built your SignInManager for your tests so I cannot be sure if you passed something in or not, but I suspect not.
If that is the case, create a mock of IHttpContextAccessor and setup the HttpContext property to return a new DefaultHttpContext() then pass that mocked object into the SignInManager.