Use ModularStartup in testing project - servicestack

Question

My testing project has grown to include many AppHost classes and having to update them all when the project changes is duplicating work so I would prefer to use modular startup on them like I do with main project.
In main project I define modular startup like so:
WebHost.CreateDefaultBuilder(args)
.UseModularStartup<Startup>()
.Build();
But in my testing project I create the AppHost like this:
var appHost = new MyCustomAppHost()
.Init()
.Start(BaseUri);
and the apphost is defined like:
public class MyCustomAppHost : AppSelfHostBase
{
public MyCustomAppHost() : base(nameof(LocalProjectAppHost), typeof(MyServices).Assembly) { }
public override void Configure(Container container)
{
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appSettings.json")
.AddEnvironmentVariables()
.AddUserSecrets(typeof(MyProject.Startup).Assembly);
var configuration = builder.Build();
//config here...
}
}
Is there a way to get modular startup working with AppSelfHostBase? My goal is to be able to specify the modular config types per AppHost like so:
public class Startup : ModularStartup
{
public Startup(IConfiguration configuration)
: base(configuration, typeof(ConfigureRedisTesting), typeof(ConfigureCorsProduction), typeof(... etc){}
}
This way I can mix and match the config files I want for this specific testing apphost and will save me copy pasting all the configs into each apphost and having to maintain them separately.

Answer 1

You can replace the AppSelfHostBase IWebHostBuilder Configuration by overriding ConfigureHost(). Your Startup class will also need to what the existing AppSelfHostBase.Startup does, so a custom AppHost like this should work with ServiceStack's Modular Startup feature:
public class AppHost : AppSelfHostBase {
public AppHost() : base(nameof(AppHost), typeof(MyServices).Assembly) { }
public class Startup : ModularStartup {
public Startup(IConfiguration configuration) : base(configuration, serviceTypes){}
public void ConfigureServices(IServiceCollection services) {
HostInstance.Configuration = Configuration;
HostInstance.Configure(services);
}
public virtual void Configure(IApplicationBuilder app, IHostingEnvironment env) {
HostInstance.Configure(app, env);
HostInstance.Bind(app);
((AppHost)HostInstance).RealInit();
}
}
public override IWebHostBuilder ConfigureHost(IWebHostBuilder host, string[] urlBases) {
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appSettings.json")
.AddEnvironmentVariables()
.AddUserSecrets(typeof(Startup).Assembly);
return host.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseWebRoot(Directory.GetCurrentDirectory())
.UseStartup<Startup>()
.UseConfiguration(builder.Build())
.UseUrls(urlBases);
}
public override void Configure(Container container) {}
}