title: Chai: assert array includes all items
body: <p>Is it possible to assert that an array includes multiple specific items using chai?</p>
  
  <p>For example, I would expect this to work:</p>
  
  <pre><code>['foo', 'bar'].should.include(['foo', 'bar']) 
  </code></pre>
  
  <p>Instead chai throws: "expected [ 'foo', 'bar' ] to include [ 'foo', 'bar' ]"</p>
  
  <p>I also tried this but it only asserts that the first item is present:</p>
  
  <pre><code>['foo', 'bar'].should.include('foo', 'bar') // variable args instead of array 
  </code></pre>
  
  <p>What am I missing?</p>