How can I check if an element's class is active in protractor?
<p>I have the following code:</p>

<p>View:</p>

<pre><code>&lt;li class="active"&gt; 
    &lt;a href="#public1' data-toggle="tab"&gt; All Stacks &lt;/a&gt;
&lt;/li&gt;
</code></pre>

<p>I can locate the element (tab) in the following manner:</p>

<pre><code>var allStacksTab = element(by.linkText("All Stacks"));
</code></pre>

<p>Now how can I test, using the expect() --to see if that element/tab has the active class?</p>