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Thank you for reporting this! The example should be something like
```public static class Testing
{
    public static Task&lt;ImmutableArray&lt;Resource&gt;&gt; RunAsync&lt;T&gt;() where T : Stack, new()
    {
        var mocks = new Mock&lt;IMocks&gt;();
        mocks.Setup(m =&gt; m.NewResourceAsync(It.IsAny&lt;MockResourceArgs&gt;()))
            .ReturnsAsync((MockResourceArgs args) =&gt; (args.Id, args.Inputs));
        mocks.Setup(m =&gt; m.CallAsync(It.IsAny&lt;MockCallArgs&gt;()))
            .ReturnsAsync((MockCallArgs args) =&gt; args.Args);
        return Deployment.TestAsync&lt;T&gt;(mocks.Object, new TestOptions { IsPreview = false });
    }
}```

If this works for you, I will open a PR for docs

So it sort of works, it does return the resource properties, but the resource name is null

Thats the actual Azure resource name property, not the Pulumi resource name

I guess you’d need to set it manually in the callback. Was it working in 2.0?

Which resources are you testing? Azure Native? Was it also Azure Native in 2.0?