title: How to get header values in laravel testing
body: <p>This is how i get response in test Case</p>
  
  <pre><code>$response = $this-&gt;call('POST','/api/auth/login',['username'=&gt;'xx','password'=&gt;'xxx'], [/* cookies */], [/* files */], ['HTTP_ClientSecret' =&gt; 'xxxx']);
  </code></pre>
  
  <p>Then we can get response content by like this</p>
  
  <p><code>$response-&gt;getContents()</code></p>
  
  <p>i want to know how to get response header data ?</p>