assertTrue(tmp+".mkdir()", tmp.mkdir());
log.info("+++ testDirFileExists, tmp="+tmp.getCanonicalPath());
URL rootURL = tmpRoot.toURI().toURL();
VFS vfs = VFS.getVFS(rootURL);
VirtualFile tmpVF = vfs.findChild(tmp.getName());
assertTrue(tmpVF.getPathName()+".exists()", tmpVF.exists());
assertFalse(tmpVF.getPathName()+".isLeaf()", tmpVF.isLeaf());
assertTrue(tmp+".delete()", tmp.delete());
assertFalse(tmpVF.getPathName()+".exists()", tmpVF.exists());
assertTrue(tmpRoot+".delete()", tmpRoot.delete());