assertNull(root.getParent());
      assertNull(root.toRealPath().getParent());
      MoreFiles.createParentDirectories(root); // test that there's no exception
    }
  }

  public void testCreateParentDirectories_relativePath() throws IOException {
    Path path = FS.getPath("nonexistent.file");
    assertNull(path.getParent());
    assertNotNull(path.toAbsolutePath().getParent());

        if (POM_PACKAGING.equals(packaging)) {
            // raw to consumer transform
            model = model.withRoot(false).withModules(null).withSubprojects(null);
            if (model.getParent() != null) {
                model = model.withParent(model.getParent().withRelativePath(null));
            }

            if (!model.isPreserveModelVersion()) {
                model = model.withPreserveModelVersion(false);

        assertEquals("123.123.123.123:9999", ftpInfo.getCacheKey());
        assertEquals("123.123.123.123", ftpInfo.getHost());
        assertEquals(9999, ftpInfo.getPort());
        assertEquals("/", ftpInfo.getParent());
        assertNull(ftpInfo.getName());

        value = "ftp://123.123.123.123/test.txt";
        ftpInfo = new FtpClient.FtpInfo(value);
        assertEquals(value, ftpInfo.toUrl());

    public void testParentRoot () throws MalformedURLException, CIFSException {
        try ( SmbFile p = new SmbFile("smb://", getContext());
              SmbResource pp = new SmbFile(p.getParent(), getContext()) ) {
            assertEquals("smb://", p.getLocator().getParent());
            assertEquals(SmbConstants.TYPE_WORKGROUP, pp.getLocator().getType());
            assertNull(pp.getLocator().getServer());

      assertNull(root.getParent());
      assertNull(root.toRealPath().getParent());
      MoreFiles.createParentDirectories(root); // test that there's no exception
    }
  }

  public void testCreateParentDirectories_relativePath() throws IOException {
    Path path = FS.getPath("nonexistent.file");
    assertNull(path.getParent());
    assertNotNull(path.toAbsolutePath().getParent());

  }

  private WeakReference<ClassLoader> useFrqInSeparateLoader() throws Exception {
    final ClassLoader myLoader = getClass().getClassLoader();
    URLClassLoader sepLoader = new URLClassLoader(getClassPathUrls(), myLoader.getParent());
    // sepLoader is the loader that we will use to load the parallel FinalizableReferenceQueue (FRQ)
    // and friends, and that we will eventually expect to see garbage-collected. The assumption

                    }
                }
                try {
                    Files.delete(artifactPath);
                    Files.delete(artifactPath.getParent());
                    Files.delete(artifactPath.getParent().getParent());
                } catch (DirectoryNotEmptyException e) {
                    // ignore
                }
            }
        } catch (IOException e) {

                artifactRequest = (ArtifactRequest) data;
            } else if (data instanceof Plugin) {
                plugin = (Plugin) data;
            }
            trace = trace.getParent();
        }

        Path trackingDir;
        boolean missing = event.getFile() == null;
        if (missing) {
            // missing artifact - let's track the path anyway

            client.changeWorkingDirectory(ftpInfo.getParent());
            validateRequest(client);

            if (ftpInfo.getName() == null) {
                // root directory
                final Set<RequestData> requestDataSet = new HashSet<>();
                if (includeContent) {
                    try {
                        final FTPFile[] files = client.listFiles(ftpInfo.getParent(), FTPFileFilters.NON_NULL);

                if (logger.isDebugEnabled()) {
                    logger.debug("Delete {}", path);
                }

                Path parent = path.getParent();
                while (deleteEmptyDirectory(parent)) {
                    parent = parent.getParent();
                }
            } catch (final IOException e) {
                logger.warn("Failed to delete {}", path, e);
            }
        }