def test_different_view_change_messages_have_different_digests(random):
batches = create_batches(view_no=0)
assert view_change_digest(create_view_change(initial_view_no=0, stable_cp=100, batches=batches)) != \
view_change_digest(create_view_change(initial_view_no=1, stable_cp=100, batches=batches))
assert view_change_digest(create_view_change(initial_view_no=1, stable_cp=100, batches=batches)) != \
view_change_digest(create_view_change(initial_view_no=1, stable_cp=101, batches=batches))
assert view_change_digest(
create_view_change(initial_view_no=1, stable_cp=100, batches=create_batches(view_no=0))) != \
view_change_digest(create_view_change(initial_view_no=1, stable_cp=100, batches=create_batches(view_no=1)))
assert view_change_digest(create_view_change(initial_view_no=0, stable_cp=100, batches=batches)) == \
view_change_digest(create_view_change(initial_view_no=0, stable_cp=100, batches=batches))
def test_update_shared_data_on_view_change_started(internal_bus, orderer):
orderer._data.preprepared = create_batches(view_no=3)
orderer._data.prepared = create_batches(view_no=3)
old_data = copy_shared_data(orderer._data)
internal_bus.send(ViewChangeStarted(view_no=4))
new_data = copy_shared_data(orderer._data)
check_service_changed_only_owned_fields_in_shared_data(OrderingService, old_data, new_data)
assert orderer._data.preprepared == []
assert orderer._data.prepared == []
def test_do_nothing_on_new_view_accepted(internal_bus, orderer):
orderer._data.preprepared = create_batches(view_no=0)
orderer._data.prepared = create_batches(view_no=0)
old_data = copy_shared_data(orderer._data)
initial_view_no = 3
new_view = create_new_view(initial_view_no=initial_view_no, stable_cp=200)
internal_bus.send(NewViewAccepted(view_no=initial_view_no + 1,
view_changes=new_view.viewChanges,
checkpoint=new_view.checkpoint,
batches=new_view.batches))
new_data = copy_shared_data(orderer._data)
assert old_data == new_data
def test_view_change_digest_is_256_bit_hexdigest(random):
digest = view_change_digest(
create_view_change(initial_view_no=0,
stable_cp=random.integer(0, 10000),
batches=create_batches(view_no=0)))
assert isinstance(digest, str)
assert len(digest) == 64
assert all(v in string.hexdigits for v in digest)
def test_send_instance_change_on_new_view_with_incorrect_batches(
internal_bus, external_bus, validators, primary,
view_change_service_builder, initial_view_no, some_item, is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
next_view_no = initial_view_no + 1
primary_name = primary(next_view_no)
non_primary_name = some_item(validators, exclude=[primary_name])
service = view_change_service_builder(non_primary_name)
vc = create_view_change(initial_view_no)
service._data.preprepared = vc.preprepared
service._data.prepared = vc.prepared
service._data.stable_checkpoint = vc.stableCheckpoint
service._data.checkpoints = vc.checkpoints
# start view change
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
non_primaries = random.sample(non_primaries,
service._data.quorums.view_change.value)
for vc_frm in non_primaries:
external_bus.process_incoming(
vc, generateName(vc_frm, service._data.inst_id))
for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries):
external_bus.process_incoming(
ack, generateName(ack_frm, service._data.inst_id))
new_view = create_new_view_from_vc(
vc, non_primaries, batches=create_batches(view_no=initial_view_no + 2))
# send NewView by Primary
init_network_msg_count = len(external_bus.sent_messages)
external_bus.process_incoming(
new_view, generateName(primary_name, service._data.inst_id))
# we don't go to new view, just send Instance Change
assert service._data.view_no == initial_view_no + 1
assert init_network_msg_count + 1 == len(external_bus.sent_messages)
msg, dst = external_bus.sent_messages[-1]
assert dst is None # broadcast
assert isinstance(msg, InstanceChange)
assert msg.viewNo == initial_view_no + 2
assert msg.reason == Suspicions.NEW_VIEW_INVALID_BATCHES.code
def test_new_view_incorrect_batches(internal_bus, validators, primary,
view_change_service_builder,
initial_view_no, some_item):
next_view_no = initial_view_no + 1
primary_name = primary(next_view_no)
non_primary_name = some_item(validators, exclude=[primary_name])
service = view_change_service_builder(non_primary_name)
vc = create_view_change(initial_view_no)
service._data.preprepared = vc.preprepared
service._data.prepared = vc.prepared
service._data.stable_checkpoint = vc.stableCheckpoint
service._data.checkpoints = vc.checkpoints
# start view change
internal_bus.send(NeedViewChange())
service._network.sent_messages.clear()
handler = Mock()
internal_bus.subscribe(NeedViewChange, handler)
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
non_primaries = random.sample(non_primaries,
service._data.quorums.view_change.value)
for vc_frm in non_primaries:
service._network.process_incoming(vc, vc_frm)
for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries):
service._network.process_incoming(ack, ack_frm)
new_view = create_new_view_from_vc(
vc, non_primaries, batches=create_batches(view_no=initial_view_no + 2))
# send NewView by Primary
service._network.process_incoming(new_view, primary_name)
# make sure that NeedViewChange is called
handler.assert_called_with(NeedViewChange())
# make sure that we get to the next view
assert service._data.view_no == initial_view_no + 2
assert service._data.waiting_for_new_view
