A set of principles to enhance testing APIs created inside R, and the engine behind automatic reloading of rendered Shiny apps becomes available for new use cases.

Episode Links 

• This week's curator: Jon Calder - @jonmcalder@fosstodon.org (Mastodon) & @jonmcalder (X/Twitter)
• Testing Your Plumber APIs from R
• watcher 0.2.0: filesystem watching for R, and the engine behind Shiny auto-reload
• Entire issue available at rweekly.org/2026-W28

Supplement Resources

• {plumber2}: https://plumber2.posit.co/
• {httr2}: https://httr2.r-lib.org/index.html
• {mirai}: https://mirai.r-lib.org/index.html
• {nanonext}: https://nanonext.r-lib.org/index.html
• roxygen2 @exampleIF tag https://roxygen2.r-lib.org/articles/rd-functions.html#examples
• {watcher}: https://watcher.r-lib.org/
• fswatch https://emcrisostomo.github.io/fswatch/

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  • Eric Nantz: @rpodcast@podcastindex.social (Mastodon), @rpodcast.bsky.social (BlueSky) and @theRcast (X/Twitter) 
  • Mike Thomas: @mike_thomas@fosstodon.org (Mastodon), @mike-thomas.bsky.social (BlueSky), and @mike_ketchbrook (X/Twitter) 

Music credits powered by OCRemix

• Relm's Weepy Loop - Final Fantasy 6 - MkVaff - https://ocremix.org/remix/OCR00178