As in 'The Tempest' Ariel is a the magicians eyes and ears, dutifully watching code and listening to coverage going up and down.
npm install ariel
create a mocha.opts file in your local 'test' directory. Should look something like
--require should --reporter tap --ui bdd --growl
if you want to write and test coffee-script then do
npm install coffee-script
start ariel from "node_modules/.bin"
or if you have ./node_modules/.bin" in your path then just type:
When ariel starts it compiles all coffee files into js files in order to allow for coverage and easier debugging (line number matches and coffee compiler issues). These automatically compiled files are deleted when ariel is exited (CTRL-C). It will recompile whenever a change is detected to a coffee file.
Whenever a test is detected or a change to any source file is detected a re-run of all tests is initiated and coverage is recalculated.
You can look at coverage in the webbrowser. The url is written to the console. only files included from index.js in the root are covered, so make sure you require them from there.
Command Line Arguments
--cc or --coverageConsole will output coverage to the console as a single metric instead of starting the server
The awesome coveraje (had to bundle it though since i had to make a minor change which i will try to push into the original) mocha optimist ...
Other tools that might come in handy
Growl (Windows) with Risor installed is very helpful. I like Risor because i find it more apparent and yet unobtrusive than getting a similiar bar from the top :). Dont forget to install growlnotify on windows (i also put it into dev-tools though.)