title: How do I test that a child component is rendered?
body: <p>In enzyme you can check for the existence of child component like this:</p>
  
  <pre><code>expect(wrapper.find(ChildComponent)).toHaveLength(1)
  </code></pre>
  
  <p>What is the equivalent to this test in react testing library? All the online examples I find just cover very simple tests looking for dom elements - none include examples of that render child components. How do you find a child component?</p>