title: How to test file attachment on hidden input using capybara?
body: <p>I have hidden input inside of label:</p>
  
  <pre><code>&lt;label for="upload"&gt;
    &lt;input class="hidden" type="file" name="file[picture]"&gt;
  &lt;/label&gt;
  </code></pre>
  
  <p>When I click on the label, I attach a file and then confirm.</p>
  
  <p>After that modal window pops up and I need to find appropriate div class.</p>
  
  <p>How can I test this with the help of capybara?</p>