This function initializes units tests settings by running
usethis::use_testthat() and by adding an example units tests file
tests/testthat/test-demo.R. The sample file will test a demo function
created in R/fun-demo.R.
See also
Other create files:
add_citation(),
add_code_of_conduct(),
add_compendium(),
add_contributing(),
add_description(),
add_dockerfile(),
add_license(),
add_makefile(),
add_package_doc(),
add_readme_rmd(),
add_renv(),
add_vignette()