gistfile1.cs

        [Fact]
        public async Task Fact()
        {
            var res = await Tester.Run(
                config =>
                {
                    config.Filters.Add(new BasicAuthenticationFilter("myrealm", _validator));
                },
                () =>
                {
                    var req = new HttpRequestMessage(HttpMethod.Get, "http://example.net");
                    req.Headers.Authorization = new AuthenticationHeaderValue("basic", 
                        Convert.ToBase64String(
                        Encoding.ASCII.GetBytes("Alice:Alice")));
                    return req;
                },
                controller =>
                {
                    Assert.Equal("Alice", controller.User.Identity.Name);
                });
            Assert.Equal(HttpStatusCode.OK, res.StatusCode);
        }