Watching your tests during development with Grunt

This recipe expands upon our combined use of PhantomJS with Jasmine and Grunt by demonstrating how to automatically watch our files during development and re-execute those tests.

Getting ready

To run this recipe, we will need the following items:

• JavaScript code to test, and the tests for that code

• A text editor with which to edit our code

• Node.js and npm installed and on our PATH

• The Grunt task runner (grunt-cli)

• The grunt-contrib-jasmine module

• The grunt-contrib-watch module

  Note

  The grunt-contrib-watch module allows Grunt to watch our filesystem during development and rerun certain tasks when it detects changes. We can find out more about it at https://npmjs.org/package/grunt-contrib-watch; we can install it on the command line using npm, as follows:

  npm install grunt-contrib-watch --save-dev
  

The library code that we will use for our tests is available in the downloadable code repository as string-utils.js under lib; the accompanying tests are...