General | How do I test error conditions? | How do I test if a warning is issued? | How do I test multivalue results, or see differences? | Grouping tests | I am sure I do not need to test my code. Is this true?

Adding unittest to your package | Testing functions exported by your package | Running your tests | Forcing test output color | Testing functions not exported by your package | Embedding tests in vignettes

A very simple example | Comparing results