In unitizer: Interactive R Unit Tests

Usage

unitizer stores R expressions and the result of evaluating them so that it can detect code regressions. This is akin to saving test output to a .Rout.save file as documented in Writing R Extensions, except that we're storing the actual R objects and it is much easier to review them.

To use unitizer:

Write test expressions as you would when informally testing code on the command line, and save them to a file (e.g. "my_file_name.R").
Run unitize("my_file_name.R") and follow the prompts.
Continue developing your package.
Re-run unitize("my_file_name.R"); if any tests fail you will be able to review and debug them in an interactive prompt.

unitizer can run in a non-interactive mode for use with R CMD check.