System.Net.Http.CookieTests.When_server_sets_cookie_should_have_in_cookie_container C# (CSharp) Method

        public async Task When_server_sets_cookie_should_have_in_cookie_container()
        {
            const string cookieName1 = "testcookie1";
            const string cookieName2 = "testcookie2";
            var uri = new Uri("http://localhost/");
            AppFunc appFunc = env =>
            {
                var context = new OwinContext(env);
                context.Response.Cookies.Append(cookieName1, "c1");
                context.Response.Cookies.Append(cookieName2, "c2");
                return Task.FromResult(0);
            };
            var handler = new OwinHttpMessageHandler(appFunc) { UseCookies = true };
            using (var client = new HttpClient(handler))
            {
                await client.GetAsync(uri);
            }

            handler
                .CookieContainer
                .GetCookies(uri)[cookieName1]
                .ShouldNotBeNull();

            handler
                .CookieContainer
                .GetCookies(uri)[cookieName1]
                .Value
                .ShouldBe("c1");

            handler
                .CookieContainer
                .GetCookies(uri)[cookieName2]
                .ShouldNotBeNull();

            handler
                .CookieContainer
                .GetCookies(uri)[cookieName2]
                .Value
                .ShouldBe("c2");
        }