`unittest` placement in code?

[Vladimirs Nordholm]

On Monday, 26 October 2020 at 13:36:58 UTC, Steven Schveighoffer 
wrote:
> On 10/26/20 9:16 AM, Vladimirs Nordholm wrote:
>> [...]
>
> Wherever you want. Generally people put it right after the 
> thing being tested to keep files organized.
>
> When the compiler runs unittests it runs them all in the 
> sequence they are in the file.
>
> One place to be cautious though -- if you put them inside a 
> template, they will be created for every instantiation of that 
> template.
>
> -Steve

Thanks for the explanation (and the warning) Steve :)