[Qemu-devel] [PATCH] tests: check empty qmp output visitor

[Marcel Apfelbaum <marcel.a@redhat.com>]

Checks the output visitor behaviour for NULL values.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
---
 Notes:
 - I didn't add Michael's Sob because I tweaked the test a little.
 - To be added on top of  "qapi: output visitor crashes qemu if it encounters a NULL value",
   otherwise the test will fail.

 tests/test-qmp-output-visitor.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tests/test-qmp-output-visitor.c b/tests/test-qmp-output-visitor.c
index 9c15458..de1bf83 100644
--- a/tests/test-qmp-output-visitor.c
+++ b/tests/test-qmp-output-visitor.c
@@ -507,6 +507,19 @@ static void test_visitor_out_union_anon(TestOutputVisitorData *data,
     qapi_free_UserDefAnonUnion(tmp);
 }
 
+static void test_visitor_out_empty(TestOutputVisitorData *data,
+                                   const void *unused)
+{
+    QObject *arg;
+    QDict *qdict;
+
+    arg = qmp_output_get_qobject(data->qov);
+    if (arg) {
+        qdict = qobject_to_qdict(arg);
+        QDECREF(qdict);
+    }
+}
+
 static void init_native_list(UserDefNativeListUnion *cvalue)
 {
     int i;
@@ -859,6 +872,8 @@ int main(int argc, char **argv)
                             &out_visitor_data, test_visitor_out_union_flat);
     output_visitor_test_add("/visitor/output/union-anon",
                             &out_visitor_data, test_visitor_out_union_anon);
+    output_visitor_test_add("/visitor/output/empty",
+                            &out_visitor_data, test_visitor_out_empty);
     output_visitor_test_add("/visitor/output/native_list/int",
                             &out_visitor_data, test_visitor_out_native_list_int);
     output_visitor_test_add("/visitor/output/native_list/int8",
-- 
1.8.3.1