testthat: watch – R documentation

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watch

Watch a directory for changes (additions, deletions & modifications).

This is used to power the auto_test() and auto_test_package() functions which are used to rerun tests whenever source code changes.

watch(path, callback, pattern = NULL, hash = TRUE)

`path`	character vector of paths to watch. Omit trailing backslash.
`callback`	function called everytime a change occurs. It should have three parameters: added, deleted, modified, and should return TRUE to keep watching, or FALSE to stop.
`pattern`	file pattern passed to `dir()`
`hash`	hashes are more accurate at detecting changes, but are slower for large files. When FALSE, uses modification time stamps

Use Ctrl + break (windows), Esc (mac gui) or Ctrl + C (command line) to stop the watcher.

Unit Testing for R

v3.0.2

MIT + file LICENSE

Authors

Hadley Wickham [aut, cre], RStudio [cph, fnd], R Core team [ctb] (Implementation of utils::recover())

Initial release