def test_discard_attestations(self):
"""Discarding attestations"""
t = Timestamp(b'')
t1 = t.ops.add(OpAppend(b'\x01'))
t2 = t.ops.add(OpAppend(b'\x02'))
t.attestations = {UnknownAttestation(b'unknown.', b'')}
t1.attestations = {BitcoinBlockHeaderAttestation(1)}
t2.attestations = {PendingAttestation("c2"), PendingAttestation("c1")}
discard_attestations(t, [UnknownAttestation, PendingAttestation("c1")])
tn = Timestamp(b'')
tn1 = tn.ops.add(OpAppend(b'\x01'))
tn2 = tn.ops.add(OpAppend(b'\x02'))
tn1.attestations = {BitcoinBlockHeaderAttestation(1)}
tn2.attestations = {PendingAttestation("c2")}
self.assertEqual(t, tn)
