What Yihui Xie thinks about software quality

@yihui-xie · 11 positions · On ppll ↗

Statistician and software engineer who writes R packages for reproducible research and publishing, including knitr, bookdown and blogdown.

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1 dated position, 2026, in their own words. Our reading of what Yihui Xie has said — not written or endorsed by them.

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1. 15 May 2026

   Our readingUnit testing's only job should be to flag when something unexpected happens.

   Their wordsI still believe that unit testing should be nothing more than "tell me if something unexpected happened."

   ↗Converting testthat Tests to testityihui.org 1st of 3 in this piece