title: Matching file name pattern in robot framework
body: <p>I've to download a file in an empty directory using robot framework. 
  I'm able to download that file.  </p>
  
  <p>The downloaded file name pattern would be any of below everytime  : </p>
  
  <p>file_name_1.pdf</p>
  
  <p>file_name_2.pdf</p>
  
  <p>.</p>
  
  <p>.</p>
  
  <p>file_name_NUM.pdf</p>
  
  <p>where NUM is any + integer.</p>
  
  <p>I'm using the Keyword from robot framework OperatingSystem library:</p>
  
  <pre><code>                      Wait Until Created
  </code></pre>
  
  <p>But I'm unable to set the file name matching pattern in my code.</p>