title: Check for 404 in codeception
body: <p>I use codeception with laravel. I try to write an acceptance test.</p>
  
  <p>I want to check that a url exists, meaning that I don't get 404/403/etc errors. So the response should be 200.</p>
  
  <p>How can I do that? Or am I wrong and I shouldn't check this in acceptance tests and instead use "I can see something" ? I'm just a little bit confused to use <code>$I-&gt;see</code>, because the label is likely to be changed/corrected, so relying on the label is doubtful. I just want to check that at least I dont see "not found". But depending on the 404 page design, there may not be this exactly line "not found" (what if I just put "404" in my 404 page)</p>