@Test
public void testExtractRawAccountName() throws Exception {

  Assert.assertEquals("abfs", UriUtils.extractAccountNameFromHostName("abfs.dfs.core.windows.net"));
  Assert.assertEquals("abfs", UriUtils.extractAccountNameFromHostName("abfs.dfs.preprod.core.windows.net"));
  Assert.assertEquals(null, UriUtils.extractAccountNameFromHostName("abfs.dfs.cores.windows.net"));
  Assert.assertEquals(null, UriUtils.extractAccountNameFromHostName(""));
  Assert.assertEquals(null, UriUtils.extractAccountNameFromHostName(null));
  Assert.assertEquals(null, UriUtils.extractAccountNameFromHostName("abfs.dfs.cores.windows.net"));
}