When I run a test in a

docker_environment

, is there an option that the docker container gets auto-deleted afterwards? It looks like it is not reusing the container on subsequent runs or stops and removes it.

yes the containers are not reused across runs. See https://github.com/pantsbuild/pants/blob/f7f487c59a3c58c846b48a18eb65342b75108acf/src/rust/engine/process_execution/docker/src/docker.rs#L525 which shuts down the "container cache" when a Pants session is shutdown. This is an area where contributions from the community could help improve the feature.

I reported this on GitHub some time ago

Thanks for the information!