title: Laravel AssertJsonCount on a nested array
body: <p>How can I call <code>assertJsonCount</code> using an indexed, nested array?</p>
  
  <p>In my test, the following JSON is returned:</p>
  
  <pre><code>[[{"sku":"P09250"},{"sku":"P03293"}]]
  </code></pre>
  
  <p>But attempting to use <code>assertJsonCount</code> returns the following error:</p>
  
  <pre><code>$response-&gt;assertJsonCount(2);
  
  // Failed asserting that actual size 1 matches expected size 2.
  </code></pre>