HOWTO: automatic test a D program

[maboiteaspam]

Hi,

I m looking for some methods/tools to implement tests on my very 
little application about strings manipulation.

I m looking to
- avoid regressions
- measure performance
- learn it

I made a quick search on the newsgroup archives, without success.

In case my question is obvious, i would say that this is my very 
first desktop program,  i m really unfamiliar with this 
environment.

Any suggestions are appreciated !
bye