@Disabled
@Test
void basicTest() throws IOException {

    final Path path = new Path("/dateTest.txt");
    HDFSFileAppender.runOnHDFS(userGroupInformation, conf, hdfs -> {
        try {
            hdfs.exists(path);
        } catch (final IOException e) {
            throw new UncheckedIOException(e);
        }
    });
    final ContentSummary summary = hdfs.getContentSummary(path);
    System.out.println(summary);
}