@Test
 public void compress65FilesManyDepthDirsMultithreaded() throws Exception {
   virtualContentConfiguration.setAllowEmptyFiles(true);
   fillRandomlyAndTest(65, 5, 2, 200, 150, true);
 }
 @Test
 public void compress20FilesVeryDeepDirs() throws Exception {
   virtualContentConfiguration.setAllowEmptyFiles(true);
   fillRandomlyAndTest(20, 15, 1, 200, 150, false);
 }
 @Test
 public void compress90FilesManyDirs() throws Exception {
   virtualContentConfiguration.setAllowEmptyFiles(true);
   fillRandomlyAndTest(90, 3, 4, 200, 150, false);
 }