Refactor Functional Tests to support Minimal Web APIs

Modified August 15, 2022

Tim Deschryver

timdeschryver.dev

When you're migrating an existing codebase to use the new ASP.NET 6 Minimal Web API structure or if you're writing your first test, then you might notice that the setup of a functional test is a tiny bit different.

Because we're testing the application from the outside, and not its internal details, the tests should be green after these changes.

Make Program public link

 Program.cs content_paste
var builder = WebApplication.CreateBuilder(args);
builder.Services.RegisterModules();
 
var app = builder.Build();
app.MapEndpoints();
app.Run();
 
 public partial class Program { }

Use the Program type (instead of Startup) to create a WebApplicationFactory link

 WebApplicationFactory.cs content_paste
 public class ApiWebApplicationFactory : WebApplicationFactory<Startup>
 public class ApiWebApplicationFactory : WebApplicationFactory<Program>
{
    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.ConfigureAppConfiguration(config => {});
        builder.ConfigureTestServices(services => {});
    }
}

Feel free to update this blog post on GitHub, thanks in advance!

Support me

I appreciate it if you would support me if have you enjoyed this post and found it useful, thank you in advance.

Share this post