xref: /openbmc/qemu/tests/unit/check-qnull.c (revision 0f9668e0)
1 /*
2  * QNull unit-tests.
3  *
4  * Copyright (C) 2016 Red Hat Inc.
5  *
6  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
7  * See the COPYING.LIB file in the top-level directory.
8  */
9 #include "qemu/osdep.h"
10 
11 #include "qapi/qmp/qnull.h"
12 #include "qapi/qobject-input-visitor.h"
13 #include "qapi/qobject-output-visitor.h"
14 #include "qapi/error.h"
15 
16 /*
17  * Public Interface test-cases
18  *
19  * (with some violations to access 'private' data)
20  */
21 
qnull_ref_test(void)22 static void qnull_ref_test(void)
23 {
24     QObject *obj;
25 
26     g_assert(qnull_.base.refcnt == 1);
27     obj = QOBJECT(qnull());
28     g_assert(obj);
29     g_assert(obj == QOBJECT(&qnull_));
30     g_assert(qnull_.base.refcnt == 2);
31     g_assert(qobject_type(obj) == QTYPE_QNULL);
32     qobject_unref(obj);
33     g_assert(qnull_.base.refcnt == 1);
34 }
35 
qnull_visit_test(void)36 static void qnull_visit_test(void)
37 {
38     QObject *obj;
39     Visitor *v;
40     QNull *null;
41 
42     /*
43      * Most tests of interactions between QObject and visitors are in
44      * test-qmp-*-visitor; but these tests live here because they
45      * depend on layering violations to check qnull_ refcnt.
46      */
47 
48     g_assert(qnull_.base.refcnt == 1);
49     obj = QOBJECT(qnull());
50     v = qobject_input_visitor_new(obj);
51     qobject_unref(obj);
52     visit_type_null(v, NULL, &null, &error_abort);
53     g_assert(obj == QOBJECT(&qnull_));
54     qobject_unref(null);
55     visit_free(v);
56 
57     null = NULL;
58     v = qobject_output_visitor_new(&obj);
59     visit_type_null(v, NULL, &null, &error_abort);
60     visit_complete(v, &obj);
61     g_assert(obj == QOBJECT(&qnull_));
62     qobject_unref(null);
63     qobject_unref(obj);
64     visit_free(v);
65 
66     g_assert(qnull_.base.refcnt == 1);
67 }
68 
main(int argc,char ** argv)69 int main(int argc, char **argv)
70 {
71     g_test_init(&argc, &argv, NULL);
72 
73     g_test_add_func("/public/qnull_ref", qnull_ref_test);
74     g_test_add_func("/public/qnull_visit", qnull_visit_test);
75 
76     return g_test_run();
77 }
78