testit: A Simple Package for Testing R Packages

A minimal, dependency-free testing framework for R packages. Write tests as simple R expressions that return TRUE, using assert() for assertions (with informative error messages on failure), has_error() / has_warning() / has_message() for testing conditions, and test_pkg() to run all tests with full access to internal (non-exported) package functions. Snapshot testing via Markdown files is also supported.

Version:	1.0
Published:	2026-05-13
DOI:	10.32614/CRAN.package.testit
Author:	Yihui Xie [aut, cre] (URL: https://yihui.org), Tomas Kalibera [ctb], Steven Mortimer [ctb]
Maintainer:	Yihui Xie <xie at yihui.name>
BugReports:	https://github.com/yihui/testit/issues
License:	MIT + file LICENSE
URL:	https://github.com/yihui/testit
NeedsCompilation:	no
Materials:	NEWS
CRAN checks:	testit results

Documentation:

Reference manual:

testit.html , testit.pdf

Downloads:

Package source:	testit_1.0.tar.gz
Windows binaries:	r-devel: testit_1.0.zip, r-release: testit_1.0.zip, r-oldrel: testit_1.0.zip
macOS binaries:	r-release (arm64): testit_1.0.tgz, r-oldrel (arm64): testit_1.0.tgz, r-release (x86_64): testit_1.0.tgz, r-oldrel (x86_64): testit_1.0.tgz
Old sources:	testit archive

Reverse dependencies:

Reverse imports:	DAISIE, elfgen, FlexRL, HybridDesign, mcbette, netmhc2pan, nLTT, nodeSub, Unico, Wats
Reverse suggests:	animation, blogdown, bookdown, DDD, DT, formatR, futile.logger, GenomeAdmixR, highr, knitr, lambda.r, nlmeVPC, NlsyLinks, pagedown, risk.assessr, rticles, tinyimg, tinytex, validata, xaringan, xfun

Linking:

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