Deno•9mo ago

Debugging tests with Vitest

I am trying to launch tests in debugger. According to vitest documentation https://vitest.dev/guide/debugging.html#node-inspector-e-g-chrome-devtools running it as

vitest --inspect-brk --no-file-parallelism

vitest --inspect-brk --no-file-parallelism

should work just fine. So I tried:

deno run -A npm:vitest --inspect-brk --no-file-parallelism

deno run -A npm:vitest --inspect-brk --no-file-parallelism

But it doesn't launch a debugger - it just runs tests as usual.

Adding

--inspect-brk

--inspect-brk

to Deno itself, like:

deno run -A --inspect-brk npm:vitest --inspect-brk --no-file-parallelism

deno run -A --inspect-brk npm:vitest --inspect-brk --no-file-parallelism

It starts a debugger, but when I attach to it from vscode, it never stop on breakpoints inside tests.

What is a way to debug tests using Vitest in Deno?

Thank you.

Vitest

Next generation testing framework powered by Vite

MaxOP•4/13/25, 7:35 PM

Talking to Vitest team suggests that this is a bug in Deno, so I reported it: https://github.com/denoland/deno/issues/28879

GitHub

Vitest fails to start debugger · Issue #28879 · denoland/deno

Version: Deno 2.2.9 According to the Vitest documentation, the way to debug tests with vitest is: vitest --inspect-brk --no-file-parallelism In Deno the equivalent would be: deno -A npm:vitest --in...