title: How to attach multiple file in Laravel 5 Codeception
body: <p>I would like to attach several files to run my test in Laravel 5.2 and Codeception 2.1.6.  </p>
  
  <p>I have an input :</p>
  
  <pre><code>&lt;input type="file" id="shapefiles" name="files[]" multiple&gt;
  </code></pre>
  
  <p>When I try to attach some files to it like this :</p>
  
  <pre><code>$I-&gt;attachFile('files[]', 'districts/shapefiles/admin2.dbf');
  $I-&gt;attachFile('files[]', 'districts/shapefiles/admin2.shp');
  </code></pre>
  
  <p>I get the error :</p>
  
  <pre><code>[TestRuntimeException] None of form fields by files[] were not matched
  </code></pre>
  
  <p>I can't reproduce the behaviour I would like to test here.
  I didn't find any advice on my friend Google. How could I manage to do that ?</p>