def test_is_valid(self):
valid_record = Record(0x454c4946,
record_number=0,
seq_no=0,
flags=None,
attrs=None)
invalid_record = Record(0xffffffff,
record_number=0,
seq_no=0,
flags=None,
attrs=None)
self.assertTrue(valid_record.is_valid())
self.assertFalse(invalid_record.is_valid())
