Feature Request // File watcher to auto-run tests through TUI

[benjaminweb]

[thomasjm]

This would be very cool, but I think it's not in the cards without some major architectural changes. Currently the TUI is built as part of your tests, so a change in your tests necessitates rebuilding the TUI.

To make this happen properly, I imagine we would need the TUI to run as a separate process, not dependent on the test files, and for it to know how to build/rebuild your tests, and for it to communicate with the actual test process to show/control the test tree. These would be some major changes.

However, I think it might be interesting to try getting the workflow you want with a tool like watchexec.

I was curious and I actually got it to work like this:

# In the sandwich repo
watchexec --wrap-process=none --exts hs -r stack run demo-basic -- --tui