Summary
This covers modern testthat 3+ patterns for R package testing, written by Garrick Aden-Buie. It's structured around the practical stuff: self-sufficient tests with withr for cleanup, snapshot testing for complex output, fixture patterns, and mocking with local_mocked_bindings. The guidance on test organization (mirroring your R/ structure) and the three scales of running tests (micro/mezzo/macro) is immediately useful. What I like is it pushes you toward better habits, repetition over clever abstractions, tests that work in isolation, and the load_all workflow instead of library calls. If you're writing or improving R package tests, this gives you the modern patterns without the philosophy lectures.
Install to Claude Code
npx -y skills add posit-dev/skills --skill testing-r-packages --agent claude-codeInstalls into .claude/skills of the current project.
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Files
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Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
