Interactive R Unit Tests
Simplifies regression tests by comparing objects produced by test
code with earlier versions of those same objects. If objects are unchanged
the tests pass, otherwise execution stops with error details. If in
interactive mode, tests can be reviewed through the provided interactive
unitizeR - Interactive R Unit Tests
unitizer simplifies creating, reviewing, and debugging unit tests in R. To install:
Please keep in mind this is an experimental framework that has been thoroughly tested by one person.
unitizer bakes in a lot of contextual help so you can get started without reading all the documentation. Try the demo to get an idea:
Or check out the screencast to see
unitizer in action.
Why Another Testing Framework?
Automated Test Formalization
Are you tired of the
dput then copy-paste R objects into test file
dance, or do you use
testthat::expect_equal_to_reference a lot?
unitizer you review function output at an interactive prompt as you
would with informal tests. You then store the value, conditions (e.g.
warnings, etc.), and environment for use as the reference values in formal
tests, all with a single keystroke.
Do you wish the nature of a test failure was more immediately obvious?
When tests fail, you are shown a proper diff so you can clearly identify how the test failed:
Do you wish that you could start debugging your failed tests without additional set-up work?
unitizer drops you in the test environment so you can debug why the test
failed without further ado:
Fast Test Updates
Do you avoid improvements to your functions because that would require painstakingly updating many tests?
The diffs for the failed tests let you immediately confirm only what you intended changed. Then you can update each test with a single keystroke.
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
except that we're storing the actual R objects and it is much easier to review
- 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")
unitize("my_file_name.R")and follow the prompts
- Continue developing your package
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.
help(package="unitizer"), in particular
browseVignettes("unitizer")for a list of vignettes, or skip straight to the Introduction vignette
Thank you to:
- R Core for developing and maintaining such a wonderfully language.
- CRAN maintainers, for patiently shepherding packages onto CRAN and maintaining the repository, and Uwe Ligges in particular for maintaining Winbuilder.
- Hadley Wickham for testthat from which we borrow many concepts and use for internal tests, for devtools, and for his many other packages.
- Gábor Csárdi for crayon through which we can add a new dimension to the R experience.
- Jim Hester because covr rocks.
- Dirk Eddelbuettel and Carl Boettiger for the rocker project, and Gábor Csárdi and the R-consortium for Rhub, without which testing bugs on R-devel and other platforms would be a nightmare.
- Yihui Xie for knitr and J.J. Allaire et al. for rmarkdown, and by extension John MacFarlane for pandoc.
- @kohler for gifsicle and the ffmpeg team for ffmpeg.
- All open source developers out there that make their work freely available for others to use.
- Github, Travis-CI, Codecov, Vagrant, Docker, Ubuntu, Brew for providing infrastructure that greatly simplifies open source development.
- Free Software Foundation for developing the GPL license and promotion of the free software movement.
About the Author
Brodie Gaslam is a hobbyist programmer based in the US East Coast.
Functions in unitizer
|conditionList||Contains A List of Conditions|
|flattenUntz||Reduce S4 objects Into Lists|
|repair_environments||Repair Environment Chains|
|run_ls||Worker function to actually execute the `ls` work|
|as.character,unitizerChanges-method||Print Out A Summary Of the Changes|
|show.conditionList||Prints A list of Conditions|
|as.expression,unitizerList-method||Coerce to expression by returning items coerced to expressions|
|unitizer_sect||Define a unitizer Section|
|filename_to_storeid||Create a Store ID from a Test File Name|
|unitizerList||S4 Object To Implement Base List Methods|
|mock_item||Generates a Dummy Item For Use in Examples|
|unitizerChanges-class||Summary of Changes|
|cap_first||Captalizes or Decapitalizes First Letter|
|unitizer_demo||Demo Details and Helper Functions|
|desc||One Line Description of Object|
|editCalls||Edit Calls In Unitizer|
|as.character.bullet||Produce Character Vector Representation of Bullet Lists|
|sizeRDS||Measure object size as an RDS|
|nextItem,unitizerList-method||Iterate through items of a unitizerList ObjectJK|
|$,unitizerItemTestsErrorsDiffs-method||Subsetting Methods for unitizerItemTestsErrorsDiffs objects|
|show,unitizerDummy-method||Documentation Block for Internal S4 Methods|
|show,unitizerItemTestsErrorsDiff-method||Show Method for unitizerItemTestsErrorsDiff objects|
|$.unitizerItem||Retrieve Test Contents From Test Item|
|unitizerGlobalBase-class||Structures For Tracking Global Options|
|healEnvs||Fix Environment Ancestries|
|unitizer_result||Return Values and Related Methods for unitize Functions|
|length,unitizerChanges-method||Return Sum of Total Changes|
|set_unitizer||Set and Retrieve Store Contents|
|show,unitizerItemTestsErrorsDiffs-method||Show Method for unitizerItemTestsErrorsDiffs objects|
|length,unitizerSection-method||Compute Length of a unitizerSection-class|
|unitizer_prompt||Interactively Retrieve User Input|
|testthat_translate_file||Convert a testthat Test File to a unitizer|
|show,unitizerChanges-method||Print Out A Summary Of the Changes|
|testFuns||Store Functions for New vs. Reference Test Comparisons|
|unitizerState||Tests and Session State|
|sizeUntz||Utility To Examine Object Size|
|testthat_transcribe_file||Transcribes a testtaht File Into unitizer Format|
|validate_pre_post||Helper function for validations|
|valid_names||Make Valid Names|
|infer_unitizer_location||Infers Possible Unitizer Path From Context|
|all_eq||Like all.equal but Returns Empty String If Not all.equal|
|unitizerSection-class||Contains Representation For a Section of Tests|
|unitize||Unitize an R Test Script|
|unitizerTests-class||Collections of Calls For Testing|
|options_zero||Set Options to Initial Zero State|
|text_wrap||Text Wrapping Utilities|
|invalidateLs||Clears ls Info and Marks as Invalid|
|unitizer_ls||An `ls` Like Function|
|print.bullet||Print Methods for UL and OL objects|
|capture_output||Capture Both StdOut and StdErr|
Vignettes of unitizer
Last month downloads
|License||GPL (>= 2)|
|Collate||'asciiml.R' 'capture.R' 'is.R' 'global.R' 'change.R' 'class_unions.R' 'list.R' 'conditions.R' 'item.R' 'deparse.R' 'text.R' 'item.sub.R' 'section.R' 'test.R' 'unitizer.R' 'exec.R' 'prompt.R' 'browse.struct.R' 'browse.R' 'demo.R' 'diff.R' 'faux_prompt.R' 'get.R' 'heal.R' 'load.R' 'ls.R' 'misc.R' 'search.R' 'options.R' 'onload.R' 'parse.R' 'rename.R' 'repairenvs.R' 'result.R' 'shims.R' 'size.R' 'state.R' 'state.compare.R' 'translate.R' 'unitize.R' 'unitize.core.R' 'unitizer-package.r' 'unitizer.add.R' 'upgrade.R'|
|Packaged||2020-02-28 22:51:58 UTC; bg|
|Date/Publication||2020-03-02 12:40:02 UTC|
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