From: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
To: Serge Petrenko <sergepetrenko@tarantool.org>,
tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH 4/8] test: introduce raft unit tests
Date: Sun, 20 Dec 2020 18:28:56 +0100 [thread overview]
Message-ID: <36a79bd1-6349-cc6c-a90c-78b473a8f5f2@tarantool.org> (raw)
In-Reply-To: <51c59e82-8351-8383-552b-d0c6056a324c@tarantool.org>
Thanks for the review!
>>>> diff --git a/test/unit/raft.c b/test/unit/raft.c
>>>> new file mode 100644
>>>> index 000000000..dfb5f8e43
>>>> --- /dev/null
>>>> +++ b/test/unit/raft.c
>>>> +
>>>> +static void
>>>> +raft_test_vote_skip(void)
>>>> +{
>>>> + raft_start_test(33);
>>>> + struct raft_node node;
>>>> + raft_node_create(&node);
>>>> +
>>>> + /* Everything is skipped if the term is outdated. */
>>>
>>> 1. Let's also test a case when vote response has greater term than the candidate itself.
>> Good idea. Below is the diff (without .result file diff, to be
>> short).
>>
>> ====================
>> @@ -346,7 +346,7 @@ raft_test_vote(void)
>> static void
>> raft_test_vote_skip(void)
>> {
>> - raft_start_test(33);
>> + raft_start_test(37);
>> struct raft_node node;
>> raft_node_create(&node);
>> @@ -507,6 +507,35 @@ raft_test_vote_skip(void)
>> raft_node_cfg_is_candidate(&node, true);
>> + /*
>> + * Vote response with a bigger term must be skipped, but it will bump
>> + * the term.
>> + */
>> +
>> + /* Re-create the node so as not to write the vclock each time. */
>> + raft_node_destroy(&node);
>> + raft_node_create(&node);
>> +
>> + raft_run_next_event();
>> + is(node.raft.state, RAFT_STATE_CANDIDATE, "became candidate");
>> + is(node.raft.term, 2, "term is bumped");
>> +
>> + is(raft_node_send_vote_response(&node,
>> + 3 /* Term. */,
>> + 1 /* Vote. */,
>> + 2 /* Source. */
>> + ), 0, "message is accepted");
>> +
>> + ok(raft_node_check_full_state(&node,
>> + RAFT_STATE_CANDIDATE /* State. */,
>> + 0 /* Leader. */,
>> + 3 /* Term. */,
>> + 1 /* Vote. */,
>> + 3 /* Volatile term. */,
>> + 1 /* Volatile vote. */,
>> + "{0: 3}" /* Vclock. */
>> + ), "term is bumped and became candidate");
>> +
>> raft_node_destroy(&node);
>> raft_finish_test();
>> }
>> ====================
>
>
> I'd also set the quorum to 2 to make sure the node doesn't become leader in the old term
>
> and that it doesn't count votes from a bigger term, but maybe that's an overkill for this test.
>
> So, up to you.
Sounds good, added:
====================
@@ -525,6 +525,11 @@ raft_test_vote_skip(void)
/* Re-create the node so as not to write the vclock each time. */
raft_node_destroy(&node);
raft_node_create(&node);
+ /*
+ * Set quorum to 2 to ensure the node does not count the bigger-term
+ * vote and doesn't become a leader.
+ */
+ raft_node_cfg_election_quorum(&node, 2);
raft_run_next_event();
next prev parent reply other threads:[~2020-12-20 17:28 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-13 17:15 [Tarantool-patches] [PATCH 0/8] Raft module, part 4 - " Vladislav Shpilevoy
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 1/8] fakesys: fix ev_is_active not working on fake timers Vladislav Shpilevoy
2020-12-15 9:42 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 2/8] fakesys: introduce fakeev_timer_remaining() Vladislav Shpilevoy
2020-12-15 9:43 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 3/8] raft: introduce raft_ev Vladislav Shpilevoy
2020-12-15 10:02 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 4/8] test: introduce raft unit tests Vladislav Shpilevoy
2020-12-13 18:10 ` Vladislav Shpilevoy
2020-12-16 13:03 ` Serge Petrenko
2020-12-17 22:44 ` Vladislav Shpilevoy
2020-12-18 8:17 ` Serge Petrenko
2020-12-20 17:28 ` Vladislav Shpilevoy [this message]
2020-12-21 7:36 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 5/8] raft: fix crash when received 0 term message Vladislav Shpilevoy
2020-12-16 13:05 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 6/8] raft: fix ignorance of bad state receipt Vladislav Shpilevoy
2020-12-16 13:06 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 7/8] raft: fix crash on election timeout decrease Vladislav Shpilevoy
2020-12-16 13:08 ` Serge Petrenko
2020-12-13 17:15 ` [Tarantool-patches] [PATCH 8/8] raft: fix crash on death " Vladislav Shpilevoy
2020-12-16 13:10 ` Serge Petrenko
2020-12-21 16:50 ` [Tarantool-patches] [PATCH 0/8] Raft module, part 4 - unit tests Vladislav Shpilevoy
2020-12-21 17:29 ` Vladislav Shpilevoy
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