Automatically run your Elixir project's tests each time you save a file. Because TDD is awesome.
Add it to your dependencies:
# mix.exs (Elixir 1.4)
def deps do
[{:mix_test_watch, "~> 0.3", only: :dev, runtime: false}]
end
# mix.exs (Elixir 1.3 and earlier)
def deps do
[{:mix_test_watch, "~> 0.3", only: :dev}]
end
Run the mix task
mix test.watch
Start hacking :)
Through the mix config it is possible to run other mix tasks as well as the test task. For example, if I wished to run the Dogma code style linter after my tests I would do so like this.
# config/config.exs
use Mix.Config
if Mix.env == :dev do
config :mix_test_watch,
tasks: [
"test",
"dogma",
]
end
Tasks are run in the order they appear in the list, and the progression will stop if any command returns a non-zero exit code.
All tasks are run with MIX_ENV
set to test
.
Any command line arguments passed to the test.watch
task will be passed
through to the tasks being run. If I only want to run the tests from one file
every time I save a file I could do so with this command:
mix test.watch test/file/to_test.exs
Note that if you have configured more than one task to be run these arguments will be passed to all the tasks run, not just the test command.
If you want mix test.watch to clear the console before each run, you can enable this option in your config/dev.exs as follows:
# config/config.exs
use Mix.Config
if Mix.env == :dev do
config :mix_test_watch,
clear: true
end
To ignore changes from specific files or directories just add exclude:
regexp
patterns to your config in mix.exs
:
# config/config.exs
use Mix.Config
if Mix.env == :dev do
config :mix_test_watch,
exclude: [~r/db_migration\/.*/,
~r/useless_.*\.exs/]
end
On Linux you may need to install inotify-tools
.
You can enable desktop notifications with ex_unit_notifier.
mix test.watch
Copyright © 2015-present Louis Pilfold
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