README.Rmd

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output: github_document
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# CBTF: Caught by the Fuzz! <a href="https://www.youtube.com/watch?v=uJ-mpul94eo"><img src="man/figures/logo.png" align="right" height="120" /></a>

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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

```{r}
library(CBTF)
funs <- get_exported_functions("mime")
what <- TRUE
fuzz(funs, what)
```

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.