@Test
 public void fileDownloadTestOnMac() throws InterruptedException {
   File f = new File(c.getDownloadFullPath());
   f.mkdir();
   int before = (int) FileUtils.sizeOfDirectory(f);
   try {
     c.fileDownload(url, null);
   } catch (Exception e) {
     LOG.info(e.toString() + '\n' + e.getStackTrace()[0].toString());
   }
   int after = (int) FileUtils.sizeOfDirectory(f);
   assertTrue(after > before);
 }