title: How to check for Map object keys in Jest
body: <p>Using Jest, I am trying to check for keys in a JavaScript Map object and <code>toHaveProperty</code> does not work. In Mocha/Chai you can <code>assert.hasAllKeys(map, keys)</code></p>
  
  <p>JavaScript Map: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map" rel="noreferrer">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map</a></p>
  
  <p>Is there a way to do this?</p>