public class Tests
    {
        public class TestStartup
        {
            public void Configure(IApplicationBuilder app)
            {
                app.UseOwin(conf => conf.UseNancy());
            }

#if NETCOREAPP3_0
            public void ConfigureServices(IServiceCollection services)
            {
                services.Configure<KestrelServerOptions>(options =>
                {
                    options.AllowSynchronousIO = true;
                });


            }

#endif
        }

        public class Module : NancyModule
        {
            public Module()
            {
                Post("/", args =>
                {
                    var str = Request.Body.AsString();
                    Assert.IsNotEmpty(str);

                    return str;
                });
            }
        }

        [Test]
        public async Task Test1()
        {
            var builder = new WebHostBuilder()
                .UseStartup<TestStartup>();

            using (var server = new TestServer(builder))
            {
#if NETCOREAPP3_0
                server.AllowSynchronousIO = true;
#endif
                using (var client = server.CreateClient())
                {

                    var str = "string";

                    var httpContent = new StringContent(str);

                    var response = await client.PostAsync("/", httpContent);

                    Assert.IsNotEmpty(await response.Content.ReadAsStringAsync());
                }
            }
        }

        [Test]
        public async Task Test2()
        {

            Task.Run(() =>
            {
                var host = new WebHostBuilder()
               .UseKestrel()
               .UseUrls("http://localhost:8080")
               .UseStartup<TestStartup>()
               .Build();

                host.Run();
            });


            var str = "string";

            var httpContent = new StringContent(str);

            var client = new HttpClient();

            var response = await client.PostAsync("http://localhost:8080", httpContent);

            Assert.IsNotEmpty(await response.Content.ReadAsStringAsync());

        
        }