ConfigureTestContainer not being invoked

[paulomorgado]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When a ConfigureTestContainer action is register through WebHostBuilder.ConfigureTestContainer, the action is not invoked.

Expected Behavior

The action should be invoked.

Steps To Reproduce

I've adapted the test ServicesCanBeOverridenForTestingAsync to:

var builder = new WebHostBuilder()
    .UseStartup<ThirdPartyContainerStartup>()
    .ConfigureTestServices(services =>
    {
        Console.WriteLine("WebHostBuilder.ConfigureTestServices");
    })
    .ConfigureTestContainer<ThirdPartyContainer>(container =>
    {
        Console.WriteLine("WebHostBuilder.ConfigureTestContainer");
    })
    ;

var host = new TestServer(builder);

public class ThirdPartyContainerStartup
{
    public void ConfigureServices(IServiceCollection services)
    {
        Console.WriteLine("ThirdPartyContainerStartup.ConfigureServices");
    }
    public void ConfigureContainer(IServiceCollection services)
    {
        Console.WriteLine("ThirdPartyContainerStartup.ConfigureContainer");
    }
    public void Configure(IApplicationBuilder app)
    {
        Console.WriteLine("ThirdPartyContainerStartup.Configure");
    }
}
public class ThirdPartyContainer
{
    public IServiceCollection Services { get; set; }
}
public class ThirdPartyContainerServiceProviderFactory : IServiceProviderFactory<ThirdPartyContainer>
{
    public ThirdPartyContainer CreateBuilder(IServiceCollection services) => new ThirdPartyContainer { Services = services };
    public IServiceProvider CreateServiceProvider(ThirdPartyContainer containerBuilder) => containerBuilder.Services.BuildServiceProvider();
}

And the output is:

ThirdPartyContainerStartup.ConfigureServices
WebHostBuilder.ConfigureTestServices
ThirdPartyContainerStartup.ConfigureContainer
ThirdPartyContainerStartup.Configure

Exceptions (if any)

No response

.NET Version

.NET SDK 8.0.100-rc.2.23502.2

Anything else?

No response

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[halter73]

Given that WebApplicationBuilder uses the generic host internally, I think this is a dupe of #14907.