Unit Test Hangs When Retrieving Undefined Service Metadata Name

[GuyWhoKnowsTheGuy]

What happened?

My unit test hangs (deadlock?) when attempting to retrieve a service's metadata name, which happens to be undefined.

Expected Behavior

Accessing an undefined value should return a default value or throw an error.

Steps to reproduce

See gist

Output of pulumi about

CLI
Version 3.66.0
Go Version go1.20.3
Go Compiler gc

Host
OS Microsoft Windows 10 Pro
Version 10.0.19045 Build 19045
Arch x86_64

Backend
Name pulumi.com
URL https://app.pulumi.com/Afford2945
User Afford2945
Organizations Afford2945, RivalCoins

Pulumi locates its logs in C:\Users\Jerome\AppData\Local\Temp by default
warning: Failed to read project: no Pulumi.yaml project file found (searching upwards from C:\Users\Jerome). If you have not created a project yet, use pulumi new to do so: no project file found
warning: Failed to get information about the current stack: no Pulumi.yaml project file found (searching upwards from C:\Users\Jerome). If you have not created a project yet, use pulumi new to do so: no project file found
warning: A new version of Pulumi is available. To upgrade from version '3.66.0' to '3.68.0', visit https://pulumi.com/docs/reference/install/ for manual instructions and release notes.

Additional context

No response

Contributing

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[Frassle]

Copying gist here for posterity;

using Grpc.Core;
using NUnit.Framework;
using Pulumi;
using Pulumi.Testing;

namespace PulumiBug;

public static class ExtentionMethods
{
    public static TValue Value<TValue>(this Output<TValue> output) => GetValueAsync(output).Result;

    public static Task<T> GetValueAsync<T>(this Output<T> output)
    {
        var tcs = new TaskCompletionSource<T>();
        output.Apply(v =>
        {
            tcs.SetResult(v);
            return v;
        });
        return tcs.Task;
    }
}

public class MyStack : Stack
{
    public MyStack() 
    {
        var service = new Pulumi.Kubernetes.Core.V1.Service("MyServiceName", new());
    }
}

public class Mocks : IMocks
{
    public Task<object> CallAsync(MockCallArgs args)
    {
        return Task.FromResult((object)args.Args);
    }

    public Task<(string? id, object state)> NewResourceAsync(MockResourceArgs args)
    {
        return Task.FromResult((args.Id, (object)args.Inputs));
    }
}

[TestFixture]
public class Class1
{
    [Test]
    public async Task Test1()
    {
        var results = Pulumi.Deployment.TestAsync<MyStack>(new Mocks()).Result;

        var service = results.OfType<Pulumi.Kubernetes.Core.V1.Service>().First();
        var metaData = await service.Metadata.GetValueAsync();

        Assert.AreEqual("MyServiceName", metaData.Name);
    }
}