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How the GNU coreutils are tested (2017)

www.pixelbeat.org Reference Documentation & references Software engineering Candidate
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Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
3
submitters
3
observed span
2017–2024
peak thread · 15 comments
107 pts
latest 20+ return · 2024-02-21
100 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

Have you ever heard that old phrase "you can either make a program so simple it obviously has no bugs, or you can make a program so complex that it has no obvious bugs"? GNU programs are the latter. That's why they need to go to such lengths to test "cat".

> Current performance and test counts on a 40 core system are: $ time make -j $(nproc) check SUBDIRS=. 13s $ # time make -j $(nproc) check RUN_EXPENSIVE_TESTS=yes 1m22.244s for 9 extra expensive tests That's pretty respectable, given that coreutils include 98 programs (some are simple like yes(1) and true(1), but most of them are used millions of times a day to do real work: ls(1), kill(1), cat(1), wc(1). In fact, I used wc(1) to count the number of separate…

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
213

reference only — not used in Hall rules or ranking

Total comments
24

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2017-01-23How the GNU coreutils are testedpixelbeat60
2018-09-20How the GNU coreutils are tested (2017)First breakout · Best threadnjn1079
2024-02-21How the GNU coreutils are tested (2017)Latest 20+ point returnPaulHoule10015