title: protractor checking if element is selected
body: <p>I have 3 buttons, the html is:</p>
  
  <pre><code>&lt;label class="label-text btn btn-primary active ng-dirty ng-valid-parse" btn-radio="thisDateType.value" ng-model="controller.formData.dateType" value="disputeDate" name="dateType" ng-class="{active:thisDateType.id==controller.dateTypeSelect.radioModel.id}" ng-repeat="thisDateType in controller.dateTypeSelect.dateType"&gt;Dispute Date&lt;/label&gt;
  &lt;!-- end ngRepeat: thisDateType in controller.dateTypeSelect.dateType --&gt;
  &lt;label class="label-text btn btn-primary ng-dirty" btn-radio="thisDateType.value" ng-model="controller.formData.dateType" value="respondByDate" name="dateType" ng-class="{active:thisDateType.id==controller.dateTypeSelect.radioModel.id}" ng-repeat="thisDateType in controller.dateTypeSelect.dateType"&gt;Respond By Date&lt;/label&gt;
  &lt;!-- end ngRepeat: thisDateType in controller.dateTypeSelect.dateType --&gt;
  &lt;label class="label-text btn btn-primary" btn-radio="thisDateType.value" ng-model="controller.formData.dateType" value="slaDate" name="dateType" ng-class="{active:thisDateType.id==controller.dateTypeSelect.radioModel.id}" ng-repeat="thisDateType in controller.dateTypeSelect.dateType"&gt;SLA Date&lt;/label&gt;
  &lt;!-- end ngRepeat: thisDateType in controller.dateTypeSelect.dateType --&gt;
  </code></pre>
  
  <p>I'm trying to assert that the first button is selected using:</p>
  
  <pre><code>expect(SearchPage.disputeDateButton.isSelected()).toBe(true);
  </code></pre>
  
  <p>However protractor keeps evaluating that disputeDateButton.isSelected() is false. I've double checked my element locator xpath and its the correct one. Am I doing this right or is there another method that can be used?</p>