def METHOD_NAME(self):
    proc = IgnoreRootNsFilter('no-root')
    self.assertEqual(3, len(self.zone.records))
    filtered = proc.process_source_zone(self.zone.copy())
    self.assertEqual(2, len(filtered.records))
    self.assertEqual(
        [('A', ''), ('NS', 'sub')],
        sorted([(r._type, r.name) for r in filtered.records]),
    )