mix test.watch
Automatically run your Elixir project's tests each time you save a file. Because TDD is awesome.
Usage
Add it to your dependencies:
# mix.exs (Elixir 1.4)
def deps do
[{:mix_test_watch, "~> 0.5", only: :dev, runtime: false}]
end
# mix.exs (Elixir 1.3 and earlier)
def deps do
[{:mix_test_watch, "~> 0.5", only: :dev}]
end
Run the mix task
mix test.watch
Start hacking :)
Running Additional Mix Tasks
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
.
Passing Arguments To Tasks
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.
Running tests of modules that changed
Elixir 1.3 introduced --stale
option that will run only those test files which reference modules that have changed since the last run. You can pass it to test.watch:
mix test.watch --stale
Clearing The Console Before Each Run
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
Excluding files or directories
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
Compatibility Notes
On Linux you may need to install inotify-tools
.
Desktop Notifications
You can enable desktop notifications with ex_unit_notifier.
Licence
mix test.watch
Copyright Β© 2015-present Louis Pilfold
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.