def METHOD_NAME(self):
    """Test getDescendents method."""
    scop = Scop(dir_path="SCOP", version="test")
    fold = scop.getNodeBySunid(46457)
    # get px descendents
    domains = fold.getDescendents("px")
    self.assertEqual(len(domains), 14)
    for d in domains:
        self.assertEqual(d.type, "px")
    sfs = fold.getDescendents("superfamily")
    self.assertEqual(len(sfs), 1)
    for d in sfs:
        self.assertEqual(d.type, "sf")
    # cl has no cl descendent
    cl = fold.getDescendents("cl")
    self.assertEqual(cl, [])