selective tests

[Martin Brezeln]

Is it possible to execute only certain modules or tests which are 
defined in certain directories?

For example, in go one can run "go test ./XYZ" to execute ony 
tests in ./XYZ or "go test ./..." to execute all the tests in and 
under the current directory.

Please don't get me wrong, i do not wish to start a discussion 
about doing things the "go way". I am asking if there is a way to 
achieve a similar result with dub (or maybe without dub?
🤔)