aptitude package filtering

[Yavuz Yetim <yyetim@princeton.edu>]

Hi,

I would like to list all packages installed from testing. How can I do
that? First limiting to ~installed and then searching ~archive(testing)
gives me packages that are installed and available in testing and that's
not what I want. For example, I have evolution 2.22 from stable. So,
~installed matches evolution 2.22, so package evolution is in the list
and ~archive(testing) matches evolution because evolution 2.28 is in
testing. However, I don't want to see evolution in the list because I
want only the packages that are installed from testing (not the ones
that are installed and available in testing). If it is not installed
from testing, I don't want to see it. How can I do that? I hope the
explanation was clear.

Thanks,
Yavuz