Hacker News Reader

Test code written by a human counts as "tested by a human". Also, most code is literally tested (manually) by humans in addition to automated tests. You are being pointlessly pedantic.

View on HN

Bun has a test suite of tens of thousands of tests. For purely non-functional changes, like refactors or rewrites (e.g. a Rust rewrite) I rely primarily on test suites, not manual testing, in order to ensure that nothing regressed. I mean, sure, I am going to poke around, too, but the test suite is the encoding of thousands of obscure bugs and issues over years. There is no way my manual testing will be able to cover the same ground.

> Test code written by a human counts as "tested by a human".

Were Bun's tests generated by an LLM? If they were, were they read by a human afterwards to be validated?

Publicly based on my calculations[1] there only ~20k tests. I would say they are usual tests for the runtime. Constantly running on the CI much lesser amount. Average test count/line of code ratio drops after rewrite. And even before Node have denser tests count/LOC ratio

[1] https://kant2002.github.io/en/llm/2026/05/16/bun-pr-analysis...

Reply on news.ycombinator.com