[Karma] Run

Run 

1. HelloWorld.js

- There is a HelloWorld.js in app folder

function helloWorld() { return "Hello World"; };

2. HelloWorldSpec.js

- HelloWorldSpec.js will be located in tests folder

describe("Hello" , function(){ it("say", function(){ expect(helloWorld()).toEqual("Hello World"); }); });  

3. Karma start

- karma start