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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 #include <glib.h>
11
12 #include "qapi/qmp/qobject.h"
13 #include "qemu-common.h"
14 #include "qapi/qmp-input-visitor.h"
15 #include "qapi/qmp-output-visitor.h"
16 #include "qapi/error.h"
17
18 /*
19  * Public Interface test-cases
20  *
21  * (with some violations to access 'private' data)
22  */
23
24 static void qnull_ref_test(void)
25 {
26     QObject *obj;
27
28     g_assert(qnull_.refcnt == 1);
29     obj = qnull();
30     g_assert(obj);
31     g_assert(obj == &qnull_);
32     g_assert(qnull_.refcnt == 2);
33     g_assert(qobject_type(obj) == QTYPE_QNULL);
34     qobject_decref(obj);
35     g_assert(qnull_.refcnt == 1);
36 }
37
38 static void qnull_visit_test(void)
39 {
40     QObject *obj;
41     QmpOutputVisitor *qov;
42     QmpInputVisitor *qiv;
43
44     /*
45      * Most tests of interactions between QObject and visitors are in
46      * test-qmp-*-visitor; but these tests live here because they
47      * depend on layering violations to check qnull_ refcnt.
48      */
49
50     g_assert(qnull_.refcnt == 1);
51     obj = qnull();
52     qiv = qmp_input_visitor_new(obj, true);
53     qobject_decref(obj);
54     visit_type_null(qmp_input_get_visitor(qiv), NULL, &error_abort);
55     qmp_input_visitor_cleanup(qiv);
56
57     qov = qmp_output_visitor_new();
58     visit_type_null(qmp_output_get_visitor(qov), NULL, &error_abort);
59     obj = qmp_output_get_qobject(qov);
60     g_assert(obj == &qnull_);
61     qobject_decref(obj);
62     qmp_output_visitor_cleanup(qov);
63
64     g_assert(qnull_.refcnt == 1);
65 }
66
67 int main(int argc, char **argv)
68 {
69     g_test_init(&argc, &argv, NULL);
70
71     g_test_add_func("/public/qnull_ref", qnull_ref_test);
72     g_test_add_func("/public/qnull_visit", qnull_visit_test);
73
74     return g_test_run();
75 }
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