TestActorRef can not catch exceptions on asynchronous methods

[Nican]

Version Information
Version of Akka.NET? Akka 1.4.46
Which Akka.NET Modules? Akka.TestKit 1.4.46, xunit 2.4.1

Describe the bug
I am attempting to test the behavior of Actors. I am not very good at it yet, so every once in a while there is an exception, and the test just swallows the exception, and I have to go search why ExpectMsg is timing out.

I have found the best way to test the actor behavior is with TestActorRef.Receive, but it only works for synchronous methods.

To Reproduce
Test actor:

public class ExceptionActor : ReceiveActor
{
    public record GiveError();
    public record GiveErrorAsync();
    public ExceptionActor()
    {
        Receive<GiveError>((b) =>
        {
            throw new Exception("WAT");
        });

        ReceiveAsync<GiveErrorAsync>(async (b) =>
        {
            await Task.Delay(TimeSpan.FromSeconds(0.1));
            throw new Exception("WATASYNC");
        });
    }
}

This test fails (Expected behavior):

    [Fact]
    public void GetException()
    {
        var props = Props.Create<ExceptionActor>();
        var subject = new TestActorRef<ExceptionActor>(Sys, props, null, "testA");
        subject.Receive(new ExceptionActor.GiveError());
    }

This test does not fail (Not expected behavior):

    [Fact]
    public void GetExceptionAsync()
    {
        var props = Props.Create<ExceptionActor>();
        var subject = new TestActorRef<ExceptionActor>(Sys, props, null, "testB");
        subject.Receive(new ExceptionActor.GiveErrorAsync());
    }

Expected behavior
To have a ReceiveAsync method for asynchronous method handling.
OR
Some mechanism that automatically watches for any unhandled exceptions in tests, and have the test failure display the information.

Actual behavior
Unhandled exceptions disappear.

Environment
.NET Core v7 on Windows

Additional context
I am fairly new to akka.net, but I am loving it. I am following the instructions on Testing Actor Systems, and it feels like I am missing something. Are there no better ways to watch that unhandled exceptions exist?

[Aaronontheweb]

Possibly related: #6279

[Aaronontheweb]

Actually, #6279 is definitely not related. This looks to me more like a lapse in the TestActorRef test suites itself.

@Arkatufus can you take a look at this for 1.4.47?

[Arkatufus]

Will do, I'll give a stab at this.