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block: Switch bdrv_write_zeroes() to byte interface
[qemu.git] / tests / check-qnull.c
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     QmpOutputVisitor *qov;
41     QmpInputVisitor *qiv;
42
43     /*
44      * Most tests of interactions between QObject and visitors are in
45      * test-qmp-*-visitor; but these tests live here because they
46      * depend on layering violations to check qnull_ refcnt.
47      */
48
49     g_assert(qnull_.refcnt == 1);
50     obj = qnull();
51     qiv = qmp_input_visitor_new(obj, true);
52     qobject_decref(obj);
53     visit_type_null(qmp_input_get_visitor(qiv), NULL, &error_abort);
54     qmp_input_visitor_cleanup(qiv);
55
56     qov = qmp_output_visitor_new();
57     visit_type_null(qmp_output_get_visitor(qov), NULL, &error_abort);
58     obj = qmp_output_get_qobject(qov);
59     g_assert(obj == &qnull_);
60     qobject_decref(obj);
61     qmp_output_visitor_cleanup(qov);
62
63     g_assert(qnull_.refcnt == 1);
64 }
65
66 int main(int argc, char **argv)
67 {
68     g_test_init(&argc, &argv, NULL);
69
70     g_test_add_func("/public/qnull_ref", qnull_ref_test);
71     g_test_add_func("/public/qnull_visit", qnull_visit_test);
72
73     return g_test_run();
74 }
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