Of course I could write a wrapper function which takes varargs compiles the
string and run assert on that.
See http://lua-users.org/lists/lua-l/2010-05/msg00494.html
However, when hooking up to the debugger it will always report the assert in
the helper function as a
location instead of the location in the unittest which is broken. It's
obviously still available in the
callstack, but it would be nicer the other way.
For that, you'll have to redefine assert to call error with the
correct stack level.
