A Simple Package for Testing R Packages R package testit version 1.1 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. Software Yihui Xie <xie@yihui.name> Comprehensive R Archive Network (CRAN) Yihui Xie [aut, cre] (ORCID: <https://orcid.org/0000-0003-0645-5666>, URL: https://yihui.org), Tomas Kalibera [ctb], Steven Mortimer [ctb] MIT + file LICENSE (https://CRAN.R-project.org/package=testit/LICENSE) 2026-06-18 application/tgz https://CRAN.R-project.org/package=testit doi:10.32614/CRAN.package.testit