extend changing username to make sure it shows up the changes in the chat dialogue for new messages

tests/frontend/specs/change_user_name.js

@@ -26,6 +26,24 @@ describe("change username value", function(){
     //check if the username has been changed to John McLear
     expect(correctUsernameValue).to.be(true);
 
+
+
+    //click on the chat button to make chat visible
+    var $chatButton = chrome$("#chaticon");
+    $chatButton.click();
+    var $chatInput = chrome$("#chatinput");
+    $chatInput.sendkeys('O hi'); // simulate a keypress of typing JohnMcLear
+    $chatInput.sendkeys('{enter}'); // simulate a keypress of enter actually does evt.which = 10 not 13
+
+    //check if chat shows up
+    helper.waitFor(function(){
+      return chrome$("#chattext").children("p").length !== 0; // wait until the chat message shows up
+    }).done(function(){
+      var $firstChatMessage = chrome$("#chattext").children("p");
+      var containsJohnMcLear = $firstChatMessage.text().indexOf("John McLear") !== -1; // does the string contain Jo$
+      expect(containsJohnMcLear).to.be(true); // expect the first chat message to contain JohnMcLear
+    }); 
+
     done();
   });
 });