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Software testing is important, but many of us don't do it because it is frustrating and boring. testthat is a new testing framework for R that is easy to learn and use, and integrates with your existing workflow. This paper shows how, with illustrations from existing packages.
@Article{testthat, author = {Hadley Wickham}, journal = {The R Journal}, month = {June}, number = {1}, pages = {5––10}, title = {testthat: Get Started with Testing}, url = {http://journal.r-project.org/archive/2011-1/RJournal_2011-1_Wickham.pdf}, volume = {3}, year = {2011}, bdsk-url-1 = {http://journal.r-project.org/archive/2011-1/RJournal_2011-1_Wickham.pdf}, }