Oh, none of these programmes are tests. If you a into that kind of thing, you should also compete in the Mathematik-Olympiade (and physics and chemistry olympiad, too). There are also Bundeswettbewerb Mathematik and Bundeswettbewerb Informatik, that are fun to take part in.

Drop me a line (email in profile), if you want to learn more. I grew up in Germany, but ended up all over the world, currently I'm in Singapore.