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tests: qmp-test: verify command batching 

OOB introduced DROP event for flow control.  This should not affect old
QMP clients.  Add a command batching check to make sure of it.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180309090006.10018-23-peterx@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Xu 2018-03-09 17:00:05 +08:00 committed by Eric Blake
parent 469638f9cb
commit 91ad45061a
1 changed files with 22 additions and 0 deletions
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22
tests/qmp-test.c
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@ -82,6 +82,7 @@ static void test_qmp_protocol(void)
QTestState *qts;
const QListEntry *entry;
QString *qstr;
int i;
qts = qtest_init_without_qmp_handshake(common_args);
@ -139,6 +140,27 @@ static void test_qmp_protocol(void)
g_assert_cmpint(qdict_get_int(resp, "id"), ==, 2);
QDECREF(resp);
/*
* Test command batching. In current test OOB is not enabled, we
* should be able to run as many commands in batch as we like.
* Using 16 (>8, which is OOB queue length) to make sure OOB won't
* break existing clients. Note: this test does not control the
* scheduling of QEMU's QMP command processing threads so it may
* not really trigger batching inside QEMU. This is just a
* best-effort test.
*/
for (i = 0; i < 16; i++) {
qtest_async_qmp(qts, "{ 'execute': 'query-version' }");
}
/* Verify the replies to make sure no command is dropped. */
for (i = 0; i < 16; i++) {
resp = qtest_qmp_receive(qts);
/* It should never be dropped. Each of them should be a reply. */
g_assert(qdict_haskey(resp, "return"));
g_assert(!qdict_haskey(resp, "event"));
QDECREF(resp);
}
qtest_quit(qts);
}