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← Unit testing's only job should be to flag when something unexpected happens.
17 connected korrents · 18 moments from 6 May 2010 to 24 Sept 2026. Nearly all of them are about software quality .
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developer tools
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design Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Read this korrent: Unit testing's only job should be to flag when something unexpected happens. Unit testing's only job should be to flag when something unexpected happens. Last stated 5 months ago
15 May 2026
YX
Yihui Xie — holds since 2026-05-15 — tap for who they are
Same subject: Unit tests alone give little confidence in a program, because the mistakes people actually make are not the conveniently unit-testable ones. — tap to centre the map on it Unit tests alone give little confidence in a program, because the mistakes people actually make are not the conveniently unit-testable ones. Last stated 9 years ago
5 Oct 2017
HW
Hillel Wayne — holds since 2017-10-05 — tap for who they are
Same subject: Covering every line of code in tests does not guarantee covering every possible program state. — tap to centre the map on it Covering every line of code in tests does not guarantee covering every possible program state. Last stated 4 months ago
7 Jun 2026
SS
Salvatore Sanfilippo — holds since 2026-06-07 — tap for who they are
Same subject: Writing unit tests for private functions is a waste of time, since they tend to be simple and are already covered by assertions. — tap to centre the map on it Writing unit tests for private functions is a waste of time, since they tend to be simple and are already covered by assertions. Last stated 16 years ago
6 May 2010
AO
Allan Odgaard — holds since 2010-05-06 — tap for who they are
Same subject: Almost every software project has cheap testing wins left on the table: basic random testing, static analysis and fault injection pay for themselves the first time they are run. — tap to centre the map on it Almost every software project has cheap testing wins left on the table: basic random testing, static analysis and fault injection pay for themselves the first time they are run. Last stated 11 years ago
12 Dec 2015
DL
Dan Luu — holds since 2015-12-12 — tap for who they are
Same subject: Unit tests have become just more source code to maintain — only end-to-end tests can be trusted to guard real behavior. — tap to centre the map on it Unit tests have become just more source code to maintain — only end-to-end tests can be trusted to guard real behavior. Last stated 4 weeks ago
7 Sept 2026
KC
Kun Chen — holds since 2026-09-07 — tap for who they are
Same subject: Unit testing frameworks arrived so late because testing was a status divide, and testers had every incentive to keep a separate tool and language of their own. — tap to centre the map on it Unit testing frameworks arrived so late because testing was a status divide, and testers had every incentive to keep a separate tool and language of their own. Last stated 3 months ago
1 Jul 2026
KB
Kent Beck — holds since 2026-07-01 — tap for who they are
Same subject: Needing to mock code in tests often signals an underlying design problem that refactoring would fix. — tap to centre the map on it Needing to mock code in tests often signals an underlying design problem that refactoring would fix. Last stated 5 months ago
15 May 2026
YX
Yihui Xie — holds since 2026-05-15 — tap for who they are
Same subject: Write tests. Not too many. Mostly integration. — tap to centre the map on it Write tests. Not too many. Mostly integration. Last stated 9 years ago
5 Mar 2018
GR
Guillermo Rauch — holds since 2016-12-10 — tap for who they are
KD
Kent C. Dodds — holds since 2018-03-05 — tap for who they are
Same subject: A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. — tap to centre the map on it A compiler that also serves an IDE has to be lazy and deferred throughout — a different way of building compilers from the one the textbooks teach. Last stated 5 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling. — tap to centre the map on it A good tool raises the floor of what people can build without lowering the ceiling, and almost every tool quietly lowers the ceiling. Last stated a year ago
18 Sept 2025
TL
Tobias Lütke — holds since 2025-09-18 — tap for who they are
Same subject: A new API framework that ignores how existing apps were historically built undermines its own introduction — tap to centre the map on it A new API framework that ignores how existing apps were historically built undermines its own introduction Last stated a month ago
31 Aug 2026
CH
Craig Hockenberry — holds since 2026-08-31 — tap for who they are
Same subject: A software engineer who is not using a tool like Cursor is working at half productivity or worse. — tap to centre the map on it A software engineer who is not using a tool like Cursor is working at half productivity or worse. Last stated a year ago
18 Aug 2025
BT
Bret Taylor — holds since 2025-08-18 — tap for who they are
Same subject: Adding all files to git and then diffing them is a heavy-handed option for models editing files. — tap to centre the map on it Adding all files to git and then diffing them is a heavy-handed option for models editing files. Last stated a week ago
24 Sept 2026
AR
Armin Ronacher — holds since 2026-09-24 — tap for who they are
Same subject: AI coding agents work best with the same general-purpose tools built for humans, such as git and file utilities, rather than agent-specific interfaces. — tap to centre the map on it AI coding agents work best with the same general-purpose tools built for humans, such as git and file utilities, rather than agent-specific interfaces. Last stated a year ago
30 Sept 2025
HR
Harper Reed — holds since 2025-09-30 — tap for who they are
Same subject: AI coding tools perform better on greenfield projects than on existing codebases, though the advantage is smaller than commonly assumed. — tap to centre the map on it AI coding tools perform better on greenfield projects than on existing codebases, though the advantage is smaller than commonly assumed. Last stated 8 months ago
22 Jan 2026
SK
Steve Klabnik — holds since 2026-01-22 — tap for who they are
Same subject: AI coding tools remove the natural filter that slow, effortful building placed on which ideas actually get built. — tap to centre the map on it AI coding tools remove the natural filter that slow, effortful building placed on which ideas actually get built. Last stated 4 months ago
17 Jun 2026
ES
Elio Struyf — holds since 2026-06-17 — tap for who they are
Same subject: AI tools are now highly effective at generating UI code from a rough natural-language description — tap to centre the map on it AI tools are now highly effective at generating UI code from a rough natural-language description Last stated 6 months ago
7 Apr 2026
CW
Chris Wellons — holds since 2026-04-07 — tap for who they are