title: Check that only those menu items should be there with the Capybara
body: <p>Friends, I have a menu named GAR with the items: GAR Rules, GAE Rules and Gar/Gae Processes log. How to validate if only these items should be there?. If a different item is entered, the test must fail.
  If I use expect to validate the items and another item is implemented, the test will continue to pass.</p>
  <p>I tried that:
  page.all('select#tbm2').map(&amp;:value).should == %w(Regras GAR Regras GAE Log Processamentos GAR/GAE)</p>
  <pre><code>&lt;div id=&quot;tbm2&quot; class=&quot;tb&quot;&gt;
        &lt;div id=&quot;TBH_tbm2&quot; onclick=&quot;javascript:showMenu('tbm2','tbm2', true, true)&quot; class=&quot;tbh&quot;&gt;GAR&lt;/div&gt;
        &lt;div id=&quot;TBB_tbm2&quot; class=&quot;tbb&quot;&gt;
           &lt;div onclick=&quot;sendEvent(0,event,this,searchImage(this),0,'','1370','Menu','','','.13.3','',''); &quot; class=&quot;tbi tbiSel&quot;&gt;
              &lt;div&gt;
                 &lt;div class=&quot;tbiIcon&quot;&gt;&lt;img src=&quot;r/std/static/pixel.gif&quot; class=&quot;icon icon_config&quot; draggable=&quot;false&quot;&gt;&lt;/div&gt;
              &lt;/div&gt;
              &lt;div&gt;Regras GAR&lt;/div&gt;
           &lt;/div&gt;
           &lt;div onclick=&quot;sendEvent(0,event,this,searchImage(this),0,'','1370','Menu','','','.13.4','',''); &quot; class=&quot;tbi&quot;&gt;
              &lt;div&gt;
                 &lt;div class=&quot;tbiIcon&quot;&gt;&lt;img src=&quot;r/std/static/collapse16.gif&quot; class=&quot;icon&quot; draggable=&quot;false&quot;&gt;&lt;/div&gt;
              &lt;/div&gt;
              &lt;div&gt;Regras GAE&lt;/div&gt;
           &lt;/div&gt;
           &lt;div onclick=&quot;sendEvent(0,event,this,searchImage(this),0,'','1370','Menu','','','.13.6','',''); &quot; class=&quot;tbi&quot;&gt;
              &lt;div&gt;
                 &lt;div class=&quot;tbiIcon&quot;&gt;&lt;img src=&quot;r/std/icons/listini64.png&quot; class=&quot;icon&quot; draggable=&quot;false&quot;&gt;&lt;/div&gt;
              &lt;/div&gt;
              &lt;div&gt;Log Processamentos GAR/GAE&lt;/div&gt;
           &lt;/div&gt;
        &lt;/div&gt;
     &lt;/div&gt;
  &lt;/td&gt;
  </code></pre>