A very simple mechanism to fuzz-test the exported functions of an R package. At the moment this is extremely limited: it operates only on the first argument and it doesn’t introduce any randomness. However, it’s convenient when there are a large number of functions to test.
Usage
library(CBTF)
funs <- get_exported_functions("mime")
fuzz(funs, TRUE)## ✖ 🚨 CAUGHT BY THE FUZZ! 🚨
##
## ── Test input: TRUE
## guess_type FAIL a character vector argument expected
## parse_multipart FAIL $ operator is invalid for atomic vectors
##
## [ FAIL 2 | WARN 0 | SKIP 1 | OK 0 ]The first occurrence is a false positive, as the message returned indicates that the input was checked and the function returned cleanly. The second case instead reveals that the function didn’t validate its input: indeed, it expected an environment, and used the $ operation on it without checking.