Introduction
 In order to successfully complete this exam, you will need to have node v4 or greater installed on your machine.
  Install project dependencies: npm i
 To start the application: npm start
 To run the tests: npm test

 These are the only commands you should have to worry about. Running npm start will start a local webserver and you can access the page from http://localhost:8080
 Once you are finished with the exam, please delete the node_modules directory, zip the folder, and email it to the exam coordinator.
 Expectations
 We expect that you will complete this test in an honest fashion. You should not copy and paste code from stack overflow or blogs in order to complete it. Successful completion will include an implementation for each of the following requirements. Extra credit will be given for tests (which use mocha and enzyme), refactoring, and styles.
 Requirements
 Scenario
  Given a list of pizzas available at '/pizza.json'
 When the server returns a response
 Then the list of pizzas should be shown
 And a filter input is shown
 And a sort button is shown

 Scenario
  Given the user has loaded the page
 When the page waits for data to load
 Then the text "Loading" should be shown
 And no other elements should be shown

 Scenario
  Given the page is shown with a list of pizzas
 When the user enters filter text
 Then only the pizzas that include the filter text should be shown

 Scenario
  Given the page is shown with a list of pizzas
 When the user enters filter text
 Then the list of pizzas should be filtered in a case insensitive way

 Scenario
  Given the page is shown with a list of pizzas
 When the user clicks the sort button
 Then the list of pizzas will be sorted in reverse alphabetic order

 Scenario
  Given the user has entered text into the filter input
 When the user clicks the sort button
 The sorted list of pizzas should also be filtered according to the input