tests/unit/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/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
  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
  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
  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 }