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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
11 #include "qapi/qmp/qobject.h"
12 #include "qemu-common.h"
13 #include "qapi/qmp-input-visitor.h"
14 #include "qapi/qmp-output-visitor.h"
15 #include "qapi/error.h"
16
17 /*
18  * Public Interface test-cases
19  *
20  * (with some violations to access 'private' data)
21  */
22
23 static void qnull_ref_test(void)
24 {
25     QObject *obj;
26
27     g_assert(qnull_.refcnt == 1);
28     obj = qnull();
29     g_assert(obj);
30     g_assert(obj == &qnull_);
31     g_assert(qnull_.refcnt == 2);
32     g_assert(qobject_type(obj) == QTYPE_QNULL);
33     qobject_decref(obj);
34     g_assert(qnull_.refcnt == 1);
35 }
36
37 static void qnull_visit_test(void)
38 {
39     QObject *obj;
40     Visitor *v;
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_.refcnt == 1);
49     obj = qnull();
50     v = qmp_input_visitor_new(obj, true);
51     qobject_decref(obj);
52     visit_type_null(v, NULL, &error_abort);
53     visit_free(v);
54
55     v = qmp_output_visitor_new(&obj);
56     visit_type_null(v, NULL, &error_abort);
57     visit_complete(v, &obj);
58     g_assert(obj == &qnull_);
59     qobject_decref(obj);
60     visit_free(v);
61
62     g_assert(qnull_.refcnt == 1);
63 }
64
65 int main(int argc, char **argv)
66 {
67     g_test_init(&argc, &argv, NULL);
68
69     g_test_add_func("/public/qnull_ref", qnull_ref_test);
70     g_test_add_func("/public/qnull_visit", qnull_visit_test);
71
72     return g_test_run();
73 }
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