Makefile for running tests when files change

chriscz · July 11, 2021, 9:03pm

Hello everyone!

I’ve been using this Makefile for running my tests when things change. It works for built-in spec as well as minitest.cr.

gist.github.com

https://gist.github.com/chriscz/9cf5e72c75d30f644f7b321e9729d237

Makefile

# Requires inotify-tools to be installed. On Ubuntu / Debian:
# sudo apt install inotify-tools
CRYSTAL=crystal
TEST_ARGS=--chaos --parallel 4 --verbose
SPEC_ARGS=--order=random --error-on-warnings --verbose

WATCH=src/**/*.cr spec/**/*.cr test/**/*.cr
# The make rule to use when running tests. Either spec or test
TEST_RULE=test

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Set the TEST_RULE to either spec or test and run make watch in a window.

Edit
After digging around a bit I actually found a guard extension as well. Of course there’s also sentry, but I find this Makefile simple and it works well enough for me.