What are the best random test today?What language support already package for it?Which better to code it in paython or c++? [on hold]

I'm testing random generator number,so as in the question:
What are the best random tests today?
the tests I've heard about are:
gap test,chi test,KS test,UT01,collision tests ....
What languages support already code for it?
If there is no exiting code what is the better language to code in
c or python or c++?