title: Expect dropdown to have contents
body: <p>What is the easiest way to check that a dropdown has the options I want?</p>
  
  <p>I'm using rails and rspec along with capybara</p>
  
  <p>I'm trying to write a test along the lines of:</p>
  
  <pre><code>expect(menu).to have_contents(item1.name)
  expect(menu).to have_contents(item2.name)
  expect(menu).not_to have_contents(item3.name)
  </code></pre>