title: What is the standard convention to distinguish Protractor and Karma test files?
body: <p>I'm setting up Karma and Protractor tests for the first time.  Following <a href="https://github.com/johnpapa/angular-styleguide#testing" rel="noreferrer">John Papa's style guide</a>, unit test files are alongside the files they're testing, so for example: <code>login.controller.js, login.controller.spec.js</code></p>
  
  <p>However, if I'm adding a protractor test file I'd want to call it something like <code>login.spec.js</code>.  (this is all for the login module)</p>
  
  <p>What is the standard convention for naming to distinguish which test files are Karma unit tests and which are Protractor e2e tests?</p>