title: enzyme mount().find doesn't find anything
body: <p>The following code:</p>
  
  <pre><code>const wrapper = mount(&lt;Component /&gt;);
  console.log('how to test this with jest', Object.keys(wrapper.find('h1')));
  </code></pre>
  
  <p>Logs <code>[]</code> so the find gives me an empty object. Opening it in the browser shows the <code>Component</code> with content <code>&lt;h1&gt;hello&lt;/h1&gt;</code></p>
  
  <p>Is this the wrong selector to get <code>h1</code>?</p>
  
  <p>The <a href="https://enzymejs.github.io/enzyme/docs/api/ReactWrapper/find.html" rel="nofollow noreferrer">documentation</a> doesn't include finding elements by tag name but that selector would work with querySelector in JavaScript.</p>
  
  <p>Trying <code>wrapper.find('.some-class')</code> gives me the same result even when Component returns <code>&lt;h1 className="some-class"&gt;hello&lt;/h1&gt;</code></p>