A trivial experiment showing basic tests to ensure your sass compiles and doesn't output css until the silent flag is turned off.
Uses Tape and node-sass. This is good because it uses libsass and Javascript. libsass is fast and you get to write tests using JavaScript, rather than Ruby. TAP provides you with a very lo-fi, portable way to test that's ideal for this scenario.
Clone this repo. Then...
$ npm install
There are 3 ways you could run the tests.
$ npm test
or
$ node test
or
$ ./test/index.js
If you need a watch task...
$ watch -d -n 2 npm test