@Test
public void testGetRelativePathRoot() {

  Path root = new Path("/tmp/abc");
  Path child = new Path("/tmp/abc/xyz/file");
  Assert.assertEquals(DistCpUtils.getRelativePath(root, child), "/xyz/file");
  root = new Path("/");
  child = new Path("/a");
  Assert.assertEquals(DistCpUtils.getRelativePath(root, child), "/a");
}