void TestRaft_server_periodic_elapses_election_timeout(CuTest * tc)
{
void *r = raft_new();
/* we don't want to set the timeout to zero */
raft_set_election_timeout(r, 1000);
CuAssertTrue(tc, 0 == raft_get_timeout_elapsed(r));
raft_periodic(r, 0);
CuAssertTrue(tc, 0 == raft_get_timeout_elapsed(r));
raft_periodic(r, 100);
CuAssertTrue(tc, 100 == raft_get_timeout_elapsed(r));
}
/* If commitidx > lastApplied: increment lastApplied, apply log[lastApplied]
* to state machine (§5.3) */
void TestRaft_server_increment_lastApplied_when_lastApplied_lt_commitidx(
CuTest* tc)
{
raft_entry_t ety;
void *r = raft_new();
/* must be follower */
raft_set_state(r, RAFT_STATE_FOLLOWER);
raft_set_current_term(r, 1);
raft_set_commit_idx(r, 1);
raft_set_last_applied_idx(r, 0);
/* need at least one entry */
ety.term = 1;
ety.id = 1;
ety.data.buf = "aaa";
ety.data.len = 3;
raft_append_entry(r, &ety);
/* let time lapse */
raft_periodic(r, 1);
CuAssertTrue(tc, 0 != raft_get_last_applied_idx(r));
CuAssertTrue(tc, 1 == raft_get_last_applied_idx(r));
}
void
TestRaft_server_election_timeout_sets_to_zero_when_elapsed_time_greater_than_timeout(
CuTest * tc)
{
void *r = raft_new();
raft_set_election_timeout(r, 1000);
/* greater than 1000 */
raft_periodic(r, 2000);
/* less than 1000 as the timeout would be randomised */
CuAssertTrue(tc, raft_get_timeout_elapsed(r) < 1000);
}
/* Candidate 5.2 */
void TestRaft_follower_becoming_candidate_resets_election_timeout(CuTest * tc)
{
void *r = raft_new();
raft_set_election_timeout(r, 1000);
CuAssertTrue(tc, 0 == raft_get_timeout_elapsed(r));
raft_periodic(r, 900);
CuAssertTrue(tc, 900 == raft_get_timeout_elapsed(r));
raft_become_candidate(r);
/* time is selected randomly */
CuAssertTrue(tc, raft_get_timeout_elapsed(r) < 900);
}
void TestRaft_follower_recv_appendentries_resets_election_timeout(
CuTest * tc)
{
void *r = raft_new();
raft_set_election_timeout(r, 1000);
raft_periodic(r, 900);
msg_appendentries_t ae;
msg_appendentries_response_t aer;
memset(&ae, 0, sizeof(msg_appendentries_t));
ae.term = 1;
raft_recv_appendentries(r, 1, &ae, &aer);
CuAssertTrue(tc, 0 == raft_get_timeout_elapsed(r));
}
void TestRaft_follower_becomes_candidate_when_election_timeout_occurs(
CuTest * tc)
{
void *r = raft_new();
/* 1 second election timeout */
raft_set_election_timeout(r, 1000);
raft_add_node(r, (void*)1, 1);
raft_add_node(r, (void*)2, 0);
/* 1.001 seconds have passed */
raft_periodic(r, 1001);
/* is a candidate now */
CuAssertTrue(tc, 1 == raft_is_candidate(r));
}
void RaftConsensus::callPeriodicTimer()
{
OSS::mutex_lock lock(_raftMutex);
raft_periodic(_raft, _opt.periodic_timer_ms);
}
