Contradictory docs on required with property injection and TestWebApplicationFactory

[georg-jung]

Property injection reads (emphasis mine):

Your properties must be marked with the required keyword

The examples in ASP.NET Core Integration Testing, section Container Integration show a contradictory pattern though:

public class WebApplicationFactory : TestWebApplicationFactory<Program>
{
    [ClassDataSource<InMemoryDatabase>(Shared = SharedType.PerTestSession)]
    public InMemoryDatabase Database { get; init; } = null!;

Further, if one wants to use such factory with a test base, e.g.

public abstract class EfCoreTodoTestBase : WebApplicationTest<EfCoreWebApplicationFactory, Program>

the new() constraint on the generic forbids a EfCoreWebApplicationFactory to have required parameters.

Just not declaring the parameter required seems to work for me. Is this the recommended setup in my situation?

[thomhurst]

Yeah - It works without - because I had to support the scenario you mentioned. Probably worth a docs update.

Required is preferred if possible because it removes nullability warnings - but some scenarios don't permit it

[georg-jung]

I see. Thank you for the quick and helpful answer!