public AppFixture() { // Use the application configuration the way that it is in the real application // project var builder = Program.CreateHostBuilder(new string[0]) // You may need to do this for any static // content or files in the main application including // appsettings.json files // DirectoryFinder is an Alba helper .UseContentRoot(DirectoryFinder.FindParallelFolder("WebApplication")) // Override the hosting environment to "Testing" .UseEnvironment("Testing"); // This is the Alba scenario wrapper around // TestServer and an active .Net Core IHost System = new SystemUnderTest(builder); // There's also a BeforeEachAsync() signature System.BeforeEach(httpContext => { // Take any kind of setup action before // each simulated HTTP request // In this case, I'm setting a fake JWT token on each request // as a demonstration httpContext.Request.Headers["Authorization"] = $"Bearer {generateToken()}"; }); System.AfterEach(httpContext => { // Take any kind of teardown action after // each simulated HTTP request }); }