gobject/tests/signals.c

   1 #include <glib-object.h>
   2
   3 typedef struct _Test Test;
   4 typedef struct _TestClass TestClass;
   5
   6 struct _Test
   7 {
   8   GObject parent_instance;
   9 };
  10
  11 struct _TestClass
  12 {
  13   GObjectClass parent_class;
  14
  15   void (* variant_changed) (Test *, GVariant *);
  16 };
  17
  18 static GType test_get_type (void);
  19 G_DEFINE_TYPE (Test, test, G_TYPE_OBJECT)
  20
  21 static void
  22 test_init (Test *test)
  23 {
  24 }
  25
  26 static void
  27 test_class_init (TestClass *klass)
  28 {
  29   g_signal_new ("variant-changed-no-slot",
  30                 G_TYPE_FROM_CLASS (klass),
  31                 G_SIGNAL_RUN_LAST | G_SIGNAL_MUST_COLLECT,
  32                 0,
  33                 NULL, NULL,
  34                 g_cclosure_marshal_VOID__VARIANT,
  35                 G_TYPE_NONE,
  36                 1,
  37                 G_TYPE_VARIANT);
  38   g_signal_new ("variant-changed",
  39                 G_TYPE_FROM_CLASS (klass),
  40                 G_SIGNAL_RUN_LAST | G_SIGNAL_MUST_COLLECT,
  41                 G_STRUCT_OFFSET (TestClass, variant_changed),
  42                 NULL, NULL,
  43                 g_cclosure_marshal_VOID__VARIANT,
  44                 G_TYPE_NONE,
  45                 1,
  46                 G_TYPE_VARIANT);
  47 }
  48
  49 static void
  50 test_variant_signal (void)
  51 {
  52   Test *test;
  53   GVariant *v;
  54
  55   /* Tests that the signal emission consumes the variant,
  56    * even if there are no handlers connected.
  57    */
  58
  59   test = g_object_new (test_get_type (), NULL);
  60
  61   v = g_variant_new_boolean (TRUE);
  62   g_variant_ref (v);
  63   g_assert (g_variant_is_floating (v));
  64   g_signal_emit_by_name (test, "variant-changed-no-slot", v);
  65   g_assert (!g_variant_is_floating (v));
  66   g_variant_unref (v);
  67
  68   v = g_variant_new_boolean (TRUE);
  69   g_variant_ref (v);
  70   g_assert (g_variant_is_floating (v));
  71   g_signal_emit_by_name (test, "variant-changed", v);
  72   g_assert (!g_variant_is_floating (v));
  73   g_variant_unref (v);
  74
  75   g_object_unref (test);
  76 }
  77
  78 /* --- */
  79
  80 int
  81 main (int argc,
  82      char *argv[])
  83 {
  84   g_type_init ();
  85
  86   g_test_init (&argc, &argv, NULL);
  87
  88   g_test_add_func ("/gobject/signals/variant", test_variant_signal);
  89
  90   return g_test_run ();
  91 }