status of httpd test suites

Hi all,

I've been exploring the python test suite (httpd/test) and the perl test
suite (httpd-tests repo), starting my contributions to httpd with the tests.

I wanted to ask about these different test suites, whether they serve
distinct purposes and whether one of them is primary or complementary to
the other.
In general, where should someone add new tests?

Regards,
Giannis