Jest

Raised as a usability problem by 4 people on Hacker News over 11 years (2016–2026), in 4 threads.

People raised many different problems with Jest, but no single problem has yet been raised by 3 people in 3 different months and threads.

Unreviewed issues were grouped by machine: Claude Haiku labelled each comment as a usability complaint, named what it's about and summed up the problem in a line, and a small model grouped similar problems. Nobody has checked them by hand. Expect mistakes.

The newest 4 complaints

Mocking in Jest is very annoying to use2026-06-27
Hard to set up with React and TypeScript; documentation-following fails2023-11-01
Setting up Jest with Babel gives obscure error messages that are hard to make sense of2021-01-15
Tests took seconds or minutes; no watch mode; mocking failures were silent and hard to trace2016-12-08