[Q]: How to collect coverage from a TypeScript codebase?

[aapzu]

What happened?

I'm trying to collect code coverage from our codebase, that widely uses TypeScript (compiled with ts_project targets). However, I'm not able to get bazel coverage to work with these targets. No matter how much I try, the "$(bazel info output_path)/_coverage/_coverage_report.dat"file is always empty.

I've created a repo with some js and some ts targets. Please find more info on what works for me and what doesn't from the repo: /~https://github.com/aapzu/bazel-coverage-not-working-repro

Version

Development (host) and target OS/architectures:

Output of bazel --version: bazel 7.4.0

Version of the Aspect rules, or other relevant rules from your
WORKSPACE or MODULE.bazel file: /~https://github.com/aapzu/bazel-coverage-not-working-repro/blob/main/WORKSPACE

Language(s) and/or frameworks involved: TypeScript, JavaScript

How to reproduce

/~https://github.com/aapzu/bazel-coverage-not-working-repro

Any other information?

No response