[R] Another packaging question

[Johannes Huesing]

I am still trying to build a package. At the moment I am stuck with a
file not found error message when processing R code from the tests
subdirectory. What would be the accurate relative path for files in
the tests directory to access files in the data directory?
-- 
Johannes Hüsing               There is something fascinating about science. 
                              One gets such wholesale returns of conjecture 
mailto:johannes at huesing.name  from such a trifling investment of fact.                
http://derwisch.wikidot.com         (Mark Twain, "Life on the Mississippi")