Hi Abhijit,
I just wanted to add a bit to Doug’s answer.
So, latest Mocha’s has two options for filtering:
-g, --grep <pattern> only run tests matching <pattern>
-f, --fgrep <string> only run tests containing <string>
If I would have a special set of tests to run on specific occasions, one other option that I’d try is just to put them in a separate file, say special-tests.js, and run only that on those special occasions. :)
Cheers!