message: Add description for running specific test
diff: @@ -262,10 +262,16 @@ Before running python unit tests, please setup local testing environment:
  pip install -r dev-reqs.txt
  ```
  -Python tests can be run with:
  +All python tests can be run with:
  ./run_tests.sh
  +Alternatively, you can run a specific test with:
  +
  + ./run_specific_test.sh tests.core_tests:CoreTests.test_function_name
  +
  +Note that before running specific tests, you have to both setup the local testing environment and run all tests.
  +
  We use [Mocha](https://mochajs.org/), [Chai](http://chaijs.com/) and [Enzyme](http://airbnb.io/enzyme/) to test Javascript. Tests can be run with:
  cd /superset/superset/assets/javascripts
  