def test_handle_append_entries_candidate_to_candidate_msg_term_too_small():
controller = mock.MagicMock()
servers = [(), ()] # Need two items in list for id = 1 to be valid
id_ = 1
m = Machine(id_, controller, servers)
m.current_term = 5
m._state = constants.State.CANDIDATE
m.voted_for = id_
msg = messages.AppendEntriesMessage(
src=2,
dst=id_,
term=3, # Old term
leader_id=2,
prev_log_index=0,
prev_log_term=0,
entries=(),
leader_commit=0,
)
m.handle_AppendEntriesMessage(msg)
assert m._state == constants.State.CANDIDATE
assert m.voted_for == id_
def test_handle_append_entries_leader_to_follower():
controller = mock.MagicMock()
servers = [(), ()] # Need two items in list for id = 1 to be valid
id_ = 1
m = Machine(id_, controller, servers)
m.current_term = 5
m._state = constants.State.LEADER
msg = messages.AppendEntriesMessage(
src=2,
dst=id_,
term=7, # More recent term
leader_id=2,
prev_log_index=0,
prev_log_term=0,
entries=(),
leader_commit=0,
)
m.handle_AppendEntriesMessage(msg)
assert m._state == constants.State.FOLLOWER
assert m.voted_for == 2
def test_handle_append_entries_candidate_with_log_truncation():
controller = mock.MagicMock()
servers = [(), ()] # Need two items in list for id = 1 to be valid
id_ = 1
m = Machine(id_, controller, servers)
m.current_term = 2
m.log = [
log.LogEntry(2, 'a'),
log.LogEntry(2, 'b'),
log.LogEntry(2, 'c'),
]
m._state = constants.State.FOLLOWER
m.voted_for = id_
msg = messages.AppendEntriesMessage(
src=2,
dst=id_,
term=2,
leader_id=2,
prev_log_index=1,
prev_log_term=2,
entries=[
log.LogEntry(2, 'd'),
log.LogEntry(2, 'e'),
],
leader_commit=4,
)
m.handle_AppendEntriesMessage(msg)
assert m.log == [
log.LogEntry(2, 'a'),
log.LogEntry(2, 'b'),
log.LogEntry(2, 'd'),
log.LogEntry(2, 'e'),
]
