Ability to detect unused cassettes

[jamesbraza]

Is your feature request related to a problem? Please describe.

I have observed people delete tests during a refactor, but forget to remove the accompanying VCR cassettes.

What happens is unused cassettes slowly build-up in the repo, resulting in misleading grep results and wasted ROM.

Currently the way I detect unused cassettes is by:

1. Using Git
2. Deleting all cassettes
3. Running all unit tests to regenerate cassettes (e.g. pytest --record-mode=once)
4. Using git status to look if any outstanding changes exist beyond file modifications

Describe the solution you'd like

pytest-recording to have some option to detect unused cassettes, when running pytest on the full repo.

Describe alternatives you've considered

None considered.

Additional context

n/a

[Stranger6667]

That would be useful! I think some inspiration for implementing this can come from https://github.com/syrupy-project/syrupy

It deletes unused snapshots during testing, which looks like exactly what is needed here.

Right now I don’t have a bandwidth to work on it, but will be happy to review a PR