mutant
- mutation testing
(wikipedia: mutation testing vs. fuzzing)
mutaters.R
remotes::install_github("sckott/astr", "sckott/mutant")
As of this writing (2020-05-18) ...
# path to an R package with working tests in tests/
path <- "../randgeo/"
## collect fxns into an environment
env <- collect_fxns(path)
ls.str(env)
## make pkg map for later
pkgmap <- make_pkg_map(path)
## parse fxns with getParseData
# fxns <- parse_fxns(env)
## mutate something
mut_fxns <- mutate(as.list(env))
# what fxn was mutated?
which(vapply(mut_fxns, function(x) attr(x, "mutated"), logical(1)))
## write a new package with test suite to a tempdir
new_fxns <- make_fxns(mut_fxns)
newpath <- write_mutated_pkg(pkg_path = path, fxns = new_fxns, map = pkgmap)
## run test suite & collect diagnostics
mutout <- mutation_test(newpath)
# mutout
dplyr::select(data.frame(mutout), file, context, test, nb, failed, skipped, error, warning, passed)
This will all be internal code however - only exposing probably a few functions to users to run mutation testing, do something with results, etc.
brainstorming high level steps:
mutant
in R doing citation(package = 'mutant')