Question 1

How to set up ExUnit Notifier with mix-test.watch on Linux?

Accepted Answer

Install notify-send via apt, add ExUnitNotifier to your test formatters in test_helper.exs, and run mix test.watch. Notifications will appear automatically after each test run, providing continuous feedback.

Question 2

ExUnit Notifier vs using mix test with --trace option?

Accepted Answer

ExUnit Notifier provides desktop notifications for immediate visual feedback during auto-runs, while --trace offers detailed terminal output for debugging. Notifier is better for non-intrusive alerts in TDD workflows.

Question 3

Why is ExUnit Notifier not showing notifications on macOS?

Accepted Answer

Ensure terminal-notifier is installed via Homebrew and properly configured. Check that ExUnitNotifier is added to the formatters list and that OS notification settings are enabled.

Question 4

Can I use ExUnit Notifier in CI environments like GitHub Actions?

Accepted Answer

No, ExUnit Notifier relies on desktop GUI notifications, which are unavailable in headless CI environments. It's designed solely for local development use.

Question 5

How to clear old notifications with ExUnit Notifier on Linux?

Accepted Answer

Set the configuration :ex_unit_notifier, clear_history: true in your config files. This uses notify-send's option to remove notifications from the history, as mentioned in the README.

Question 6

Is there a way to customize the notification sound or icon with ExUnit Notifier?

Accepted Answer

Not directly with default notifiers; you need to write a custom notifier by extending the base classes, which allows full control over sound, icons, and other attributes.

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