Unittests on a module

[Dennis]

On Friday, 13 January 2023 at 19:07:46 UTC, DLearner wrote:
> Is this intended?

It is by design, though opinions differ on whether it's a good 
design.

> It's not a problem to add temporary
> ```
> void main() {
>
> }
> ```
> to the bottom of the module,

You can add the `-main` flag to make dmd automatically add such 
an empty main function when there isn't a `main` already.