anchor.diff:  
           aside.notes
               ul
  -                li mocha is a javascript testing framework
  +                li mocha is a javascript testing framework. Note `describe()` and `it()`
                   li chai is an assertion library
  -                li npm install --save-dev mocha chai
                   li Can use any testing framework you want, choose Mocha because of familiarity
  -                li Simple test example
   
       +slide
           h3 Babel
  
positive.code:         aside.notes
              ul
                  li mocha only understands ES5 syntax
                  li babel-register
                  li Used to transpile tests on the fly
                  li Update simple test
  
      +slide
          +slide
  
negative.code:         h3 Getting Started
  
          aside.notes
              p What sort of tools will we need?
              ul
                  li Test Runner (mocha, jest, karma)
                  li React test helper (enzyme)
                  li Mocking library (rewire, sinon)
  
              p Here are the packages/frameworks we will be using
              ul
                  li Mocha + Chai
  