title: assert_select first and second html table cell contents in rails
body: <p>I have the following html table:</p>
  
  <pre><code>&lt;table class="list user_permission"&gt;
    &lt;tr&gt;
      &lt;th&gt;Name&lt;/th&gt;
      &lt;th&gt;Permission&lt;/th&gt;
    &lt;/tr&gt;
    &lt;tr id="permission_1"&gt;
      &lt;td&gt;
        test user01
      &lt;/td&gt;
      &lt;td&gt;
        Reading permission
      &lt;/td&gt;
    &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>I want to assert in my tests the content of my first and second table cells. I tried it in the following way: </p>
  
  <pre><code>assert_select "tr#permission_1 td", "test user01"
  assert_select "tr#permission_1 td", "Reading permission"
  </code></pre>
  
  <p>But it didn't work, it couldn't find such a entry.</p>