Finding test location

[Vladimir Prus]

I've two related needs. First, I wanted to convert a number of tests which 
are just python scripts that use some modules. I expected that QMTest dir 
that lives at the top of tdb will be in sys.path for code that is specified 
for python.ExecTest, but it is not. (BTW, is it reasonable to have it 
there?). I cannot add it there because I can't find the absolute name of 
QMTest directory. 

In general, it would like an ability to store some data, specifically some 
directory trees,  inside the tdb. I see no way to use them in tests, because 
tests don't know their own location. 

How can this question be addressed? Is it assumed that the location of the 
test database be always passed as context variable?

- Volodya