Owin.TestServer To Test a Middleware that Requires Authentication


I have a middleware method that requires <em>context.Authentication.User.Identity.Name</em> to be resolved for proper execution. However, when writing a unit test these properties are obviously null as no sign-in has occurred. I am not using Oauth or anything authentication related in this middleware (beyond the obvious name property), as it should be handled elsewhere in another middleware (to promote re-use/flexibility of the component I am developing). Is there a way to mock/fake this value so I can run my test? I have tried everything I can think of to fake a sign-on and I am just stuck at this point. To be clear the middleware needs the value not a webapi call or the like.

//Arrange var resolver = A.Fake<IDependencyResolver>(); A.CallTo(() => resolver.GetService(typeof(ISomeService))).Returns(new TestService()); using (var server = TestServer.Create(app => { app.UseMyMiddleware(new MyMiddlewareOptions() { DependencyResolver = resolver }); app.Run(async ctx => { await ctx.Response.WriteAsync(ctx.Request.Path.Value); }); })) { //Act var response = await server.CreateRequest("/").GetAsync(); //Assert A.CallTo(() => resolver.GetService(typeof(ISomeService))) .MustHaveHappened(Repeated.Exactly.Once); Assert.AreEqual(response.StatusCode, HttpStatusCode.OK); //Etc. }


So here is one way I suppose not thrilled with it but it does the job. I will wait to accept as I imagine there should be a better way.

public class TestFakeLoginMiddleware : OwinMiddleware { public TestFakeLoginMiddleware(OwinMiddleware next) : base(next) { } public override async Task Invoke(IOwinContext context) { var identity = A.Fake<IIdentity>(); A.CallTo(() => identity.Name).Returns("TEST@domain.local"); var user = new ClaimsPrincipal(identity); context.Request.Context.Authentication.User = user; await Next.Invoke(context); } }


A bit late, I know, but could you not just create a new ClaimsIdentity?

public override async Task Invoke(IOwinContext context) { var identity= new ClaimsIdentity(new List<Claim> { new Claim(ClaimTypes.Name, "TEST@domain.local") }); var user = new ClaimsPrincipal(identity); context.Request.Context.Authentication.User = user; await Next.Invoke(context); }


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