title: Value not be empty workaround in cypress
body: <p>Please cypress is giving me undefined error when I want to check that the input is not empty like this:</p>
  <pre><code>cy.get('car').find('input').should('not.be.empty');
  </code></pre>
  <p>When I put a value into input like bmw and use a code like this, all is fine</p>
  <pre><code>cy.get('car').find('input').should('have.value', 'bmw');
  </code></pre>
  <p>So it finds the input and can read the value, but why the not.be.empty is not working? Is there some workaround to that? I do not want to specific the value of the field, could be random. Thx</p>