Leverage `--listen-on-stdin` to reuse the VM.

[lpil]

This means we can remove the work done in the hotrunner.

[sitch]

Bump -- was looking for this today

[christophweegen]

Hey @lpil

running mix test.watch --listen-on-stdin results in the tests being run in a loop.

Is this intended behaviour?

Expectation: Tests only get run on file changes or when pressed enter.

Thank you!

[lpil]

This feature has not been implemented.

[jeremyjh]

@lpil What was the reason the hot runner was removed, did it cause issues or stopped working with recent versions of Elixir/ExUnit? I'm looking for something like this functionality as my test cycles are way too slow with time taken to load the shell and VM on every execution.

[lpil]

It never worked unfortunately. We hit a bug with ExUnit that meant it wouldn't work. To fix it would require a large change to how ExUnit works and since it only effected this project they decided it wasn't worth the effort.

[thetamind]

I'm looking for something like this functionality as my test cycles are way too slow with time taken to load the shell and VM on every execution.

I just found https://github.com/scottming/vscode-elixir-test-in-iex. TestInIEx runs tests in a persistent IEx shell avoiding the VM startup time.