[PATCH 3/6] tests/qtest: migration: Add migrate_incoming_qmp helper

[Fabiano Rosas]

file-based migration requires the target to initiate its migration after
the source has finished writing out the data in the file. Currently
there's no easy way to initiate 'migrate-incoming', allow this by
introducing migrate_incoming_qmp helper, similarly to migrate_qmp.

Also make sure migration events are enabled and wait for the incoming
migration to start before returning. This avoid a race when querying
the migration status too soon after issuing the command.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
---
 tests/qtest/migration-helpers.c | 28 ++++++++++++++++++++++++++++
 tests/qtest/migration-helpers.h |  4 ++++
 2 files changed, 32 insertions(+)

diff --git a/tests/qtest/migration-helpers.c b/tests/qtest/migration-helpers.c
index 2df198c99e..bc54b29184 100644
--- a/tests/qtest/migration-helpers.c
+++ b/tests/qtest/migration-helpers.c
@@ -81,6 +81,34 @@ void migrate_set_capability(QTestState *who, const char 
*capability,
                              capability, value);
 }
 
+void migrate_incoming_qmp(QTestState *to, const char *uri, const char *fmt, 
...)
+{
+    va_list ap;
+    QDict *args, *rsp, *data;
+
+    va_start(ap, fmt);
+    args = qdict_from_vjsonf_nofail(fmt, ap);
+    va_end(ap);
+
+    g_assert(!qdict_haskey(args, "uri"));
+    qdict_put_str(args, "uri", uri);
+
+    migrate_set_capability(to, "events", true);
+
+    rsp = qtest_qmp(to, "{ 'execute': 'migrate-incoming', 'arguments': %p}",
+                    args);
+    g_assert(qdict_haskey(rsp, "return"));
+
+    rsp = qtest_qmp_eventwait_ref(to, "MIGRATION");
+    g_assert(qdict_haskey(rsp, "data"));
+
+    data = qdict_get_qdict(rsp, "data");
+    g_assert(qdict_haskey(data, "status"));
+    g_assert_cmpstr(qdict_get_str(data, "status"), ==, "setup");
+
+    qobject_unref(rsp);
+}
+
 /*
  * Note: caller is responsible to free the returned object via
  * qobject_unref() after use
diff --git a/tests/qtest/migration-helpers.h b/tests/qtest/migration-helpers.h
index 484d7c960f..57d295a4fe 100644
--- a/tests/qtest/migration-helpers.h
+++ b/tests/qtest/migration-helpers.h
@@ -23,6 +23,10 @@ bool migrate_watch_for_resume(QTestState *who, const char 
*name,
 G_GNUC_PRINTF(3, 4)
 void migrate_qmp(QTestState *who, const char *uri, const char *fmt, ...);
 
+G_GNUC_PRINTF(3, 4)
+void migrate_incoming_qmp(QTestState *who, const char *uri,
+                          const char *fmt, ...);
+
 void migrate_set_capability(QTestState *who, const char *capability,
                             bool value);
 
-- 
2.35.3