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Jakub Sobolewski @jakub-sobolewski.bsky.social · 17/09/2025

What's worse than no automated tests? Bad tests. Automated tests should save time and catch bugs early. But bad tests slow you down, cause frustration, and reduce confidence. Let’s unpack three common testing traps and how to avoid them. 🧵

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 04/08/2025

Building code gets easier every day with AI. Building code that truly matters to users remains the real challenge. At @user-conf.bsky.social virtual, I’m sharing how to ship only what matters. See it here: youtu.be/e4H28G2J05U?... #rstats #opensource

youtu.be

Don’t Write Code Your Users Haven’t Asked For - Jakub Sobolewski

YouTube video by useR! Conference

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 01/08/2025

🧪 New pattern in the R Tests Gallery: Testing code that uses LLMs, APIs, or databases External systems power our code, LLMs, APIs, DBs, libraries, but they don’t need to be in our tests. Check it out 👉 jakubsobolewski.com/r-tests-gall... #rstats #opensource

jakubsobolewski.com

R Tests Gallery

Learn how to effectively test in R and use tests to drive your development process.

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 30/07/2025

𝗪𝗮𝗻𝘁 𝘁𝗼 𝘄𝗿𝗶𝘁𝗲 𝘀𝗽𝗲𝗰𝘀 𝗳𝗼𝗿 𝗮𝗻 𝗲𝘅𝗶𝘀𝘁𝗶𝗻𝗴 𝗮𝗽𝗽? 𝗟𝗲𝘁 𝗔𝗜 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝗶𝘁𝗲𝗿𝗮𝘁𝗲 𝗳𝗮𝘀𝘁𝗲𝗿. Writing specs after the fact gets messy fast. You’re tempted to mention buttons, screens, and other UI stuff, but that only locks you into one way the app works. #rstats #opensource

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Reposted by Jakub Sobolewski

Jonathan Carroll @jonocarroll.fosstodon.org.ap.brid.gy · 28/07/2025

The latest issue of @rweekly is now live! rweekly.org/2025-W31.html Highlights: 📊 Copy the Pros: How to Recreate this NYTimes Chart in R by @MrPecners ⏩ Speed Testing Code: Three Levels by @kellybodwin 🧪 Testing your Plumber APIs from R by @jakub-sobolewski.bsky.social As always […]

fosstodon.org

Original post on fosstodon.org

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 15/07/2025

Your legacy Shiny app needs a makeover, but jumping straight into refactoring is like repainting a room with furniture still inside. Things will get messy. The safest approach? Write acceptance tests first. #rstats #rshiny #tests #testing #opensource

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Reposted by Jakub Sobolewski

R-Podcast (Eric) @rpodcast.bsky.social · 12/07/2025

Episode 207 of R Weekly Highlights is out! serve.podhome.fm/episodepage/... 🛠️ Generating Quarto syntax (Danielle Navarro) 🤔 Behavior-Driven Development @jakub-sobolewski.bsky.social 🔍 Dive()ing into the Hunt @milesmcbain.bsky.social h/t @mike-thomas.bsky.social & @rbyryo.bsky.social 🙏 #RStats

serve.podhome.fm

Issue 2025-W28 Highlights

It's been far too long since our last episode of R Weekly Highlights, but we are finally back with episode 207! In this episode we learn about novel ways…

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 11/07/2025

3 Things Tests Reveal About Your Code Ever wondered what your tests are really telling you about your code? Tests aren’t just safety nets—they’re feedback loops on your design. #rstats #tests

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 09/07/2025

Every R package deserves more than just unit tests. Let’s break down the four essential layers of testing for robust, reliable code. 👇 #rstats #testing #rpackage #opensource #quality

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 13/01/2025

𝗜'𝘃𝗲 𝗯𝗲𝗲𝗻 𝗰𝗼𝗱𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗔𝗜 𝗮𝘀𝘀𝗶𝘀𝘁 𝗳𝗼𝗿 𝗼𝘃𝗲𝗿 𝗮 𝘆𝗲𝗮𝗿. Here’s what I’ve learned about AI-assisted tests. 🧵 #r #rstats #shiny #rshiny #rtests

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 10/01/2025

𝗙𝗿𝗲𝗲 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀 𝗧𝗼 𝗕𝗼𝗼𝘀𝘁 𝗬𝗼𝘂𝗿 𝗦𝗵𝗶𝗻𝘆 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗦𝗸𝗶𝗹𝗹𝘀 To get better in Shiny we should pull insights from other tech stacks. I've collected a bunch of resources that I helped me propel my Shiny development skills and make bigger impact at @appsilon.bsky.social: #r #rstats #shiny #rshiny #rtests

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 12/12/2024

Want to get code coverage report, but not share your private code with codecov.io? Use cobertura-action. In R the most popular way to get the code coverage report is to use codecov.io with usethis::use_coverage. But there is another way: #r #rstats #shiny #rshiny #rtests

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 10/12/2024

Want Cleaner Unit Tests With The Least Effort? Try Arrange, Act, Assert Comments. Each unit test consists of 3 steps: 1️⃣ Setup test environment. 2️⃣ Call tested code. 3️⃣ Assert on the expected outcome. Use comments to separate them. Let's see how: #r #rstats #shiny #rshiny #rtests

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 09/12/2024

3 Types Of Unit Tests Every R Programmer Should Know Before starting to write a unit test, we should know what type of a test we need. We can put any test into one of those 3 categories: #r #rstats #shiny #rshiny #rtests

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Jakub Sobolewski @jakub-sobolewski.bsky.social · 06/12/2024

Anyone Interested In Building Software From The Perspective Of A User Should Watch This Playlist If you are at all interested in Behavior-Driven Development, then you need to clear your calendar and watch this series 👉 www.youtube.com/watch?v=gXh0... And here's why: #rstats #r #shiny #rshiny

youtube.com

An Ultimate Guide To BDD

YouTube video by Continuous Delivery

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