title: How to click on button with no text in Protractor ?
body: <p><a href="http://angular.github.io/peepcode-tunes/public/" rel="nofollow">I want to Click on the two Plus(+) button but the button is not having any text in Music Library Section </a></p>
  
  <p>How to Click the same?</p>
  
  <p>I tried the following code:</p>
  
  <pre><code>describe ('angularjs homepage', function() {
      browser.get('http://angular.github.io/peepcode-tunes/public/');
      element(by.css('[ng-click="player.playlist.add(album)"]')).click();
  });
  </code></pre>
  
  <p>Unfortunately It is not working.
  Please Help</p>