[gtk+] Add a test for property notification

[Matthias Clasen <matthiasc src gnome org>]

commit f870a50f1fc6e62836ee4b1138da4fb7db1b352c
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jun 9 12:47:45 2014 -0400

    Add a test for property notification
    
    This tests just a few basic things for now. Mainly, that we don't
    emit redundant notifications for enum, flags, int and boolean
    properties. It also checks that we do emit the expected notifications
    when the value actually changes. This is checked for string, double
    and float properties as well.
    
    There is a large number of exceptions in the test, and a lot more
    checks that could be done. One class of exceptions is all the places
    where we have -set booleans to go along with another property. We
    should have a dedicated test for these pairs. Another class of
    exceptions is where naked objects created by g_object_new () just
    don't have the full functionality - e.g. a tree selection without
    a tree view does not work very well. We set up the instance object
    better for these situations.

 testsuite/gtk/Makefile.am |    1 +
 testsuite/gtk/notify.c    |  671 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 672 insertions(+), 0 deletions(-)
---
diff --git a/testsuite/gtk/Makefile.am b/testsuite/gtk/Makefile.am
index a2f6fc6..822e7b4 100644
--- a/testsuite/gtk/Makefile.am
+++ b/testsuite/gtk/Makefile.am
@@ -45,6 +45,7 @@ TEST_PROGS +=                         \
        icontheme               \
        keyhash                 \
        listbox                 \
+       notify                  \
        no-gtk-init             \
        object                  \
        objects-finalize        \
diff --git a/testsuite/gtk/notify.c b/testsuite/gtk/notify.c
new file mode 100644
index 0000000..3d6ce18
--- /dev/null
+++ b/testsuite/gtk/notify.c
@@ -0,0 +1,671 @@
+/* Gtk+ property notify tests
+ * Copyright (C) 2014 Matthias Clasen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <math.h>
+#include <string.h>
+#include <gtk/gtk.h>
+#include <gtk/gtkunixprint.h>
+
+typedef struct
+{
+  const gchar *name;
+  gint count;
+} NotifyData;
+
+static void
+count_notify (GObject *obj, GParamSpec *pspec, NotifyData *data)
+{
+  if (g_strcmp0 (data->name, pspec->name) == 0)
+    data->count++;
+}
+
+/* Check that we get notifications when properties change.
+ * Also check that we don't emit redundant notifications for
+ * enum, flags, booleans, ints. We allow redundant notifications
+ * for strings, and floats
+ */
+static void
+check_property (GObject *instance, GParamSpec *pspec)
+{
+  if (G_TYPE_IS_ENUM (pspec->value_type))
+    {
+      GEnumClass *class;
+      gint i;
+      NotifyData data;
+      gulong id;
+      gint first;
+      gint value;
+      gint current_count;
+
+      class = g_type_class_ref (pspec->value_type);
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      g_object_get (instance, pspec->name, &value, NULL);
+      g_object_set (instance, pspec->name, value, NULL);
+
+      g_assert_cmpint (data.count, ==, 0);
+
+      if (class->values[0].value == value)
+        first = 1;
+      else
+        first = 0;
+  
+      for (i = first; i < class->n_values; i++)
+        {
+          current_count = data.count + 1;
+          g_object_set (instance, pspec->name, class->values[i].value, NULL);
+          g_assert_cmpint (data.count, ==, current_count);  
+
+          if (current_count == 10) /* just test a few */
+            break;
+        }
+
+      g_signal_handler_disconnect (instance, id);
+      g_type_class_unref (class);
+    }
+  else if (G_TYPE_IS_FLAGS (pspec->value_type))
+    {
+      GFlagsClass *class;
+      gint i;
+      NotifyData data;
+      gulong id;
+      guint value;
+      gint current_count;
+
+      class = g_type_class_ref (pspec->value_type);
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      g_object_get (instance, pspec->name, &value, NULL);
+      g_object_set (instance, pspec->name, value, NULL);
+
+      g_assert_cmpint (data.count, ==, 0);
+
+      for (i = 0; i < class->n_values; i++)
+        {
+          /* some flags have a 'none' member, skip it */
+          if (class->values[i].value == 0)
+            continue;
+
+          if ((value & class->values[i].value) != 0)
+            continue;
+
+          value |= class->values[i].value;
+          current_count = data.count + 1;
+          g_object_set (instance, pspec->name, value, NULL);
+          g_assert_cmpint (data.count, ==, current_count);  
+
+          if (current_count == 10) /* just test a few */
+            break;
+        }
+
+      g_signal_handler_disconnect (instance, id);
+      g_type_class_unref (class);
+    }
+  else if (pspec->value_type == G_TYPE_BOOLEAN)
+    {
+      NotifyData data;
+      gboolean value;
+      gulong id;
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      g_object_get (instance, pspec->name, &value, NULL);
+      g_object_set (instance, pspec->name, value, NULL);
+
+      g_assert_cmpint (data.count, ==, 0);
+
+      g_object_set (instance, pspec->name, 1 - value, NULL);
+
+      g_assert_cmpint (data.count, ==, 1);
+
+      g_signal_handler_disconnect (instance, id);
+    } 
+  else if (pspec->value_type == G_TYPE_INT)
+    {
+      GParamSpecInt *p = G_PARAM_SPEC_INT (pspec);
+      gint i;
+      NotifyData data;
+      gulong id;
+      gint value;
+      gint current_count;
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      g_object_get (instance, pspec->name, &value, NULL);
+      g_object_set (instance, pspec->name, value, NULL);
+
+      g_assert_cmpint (data.count, ==, 0);
+
+      for (i = p->minimum; i <= p->maximum; i++)
+        {
+          g_object_get (instance, pspec->name, &value, NULL);
+          if (value == i)
+            continue;
+
+          current_count = data.count + 1;
+          g_object_set (instance, pspec->name, i, NULL);
+          g_assert_cmpint (data.count, ==, current_count);  
+
+          if (current_count == 10) /* just test a few */
+            break;
+        }
+
+      g_signal_handler_disconnect (instance, id);
+    }
+  else if (pspec->value_type == G_TYPE_UINT)
+    {
+      guint i;
+      NotifyData data;
+      gulong id;
+      guint value;
+      gint current_count;
+      guint minimum, maximum;
+
+      if (G_IS_PARAM_SPEC_UINT (pspec))
+        {
+          minimum = G_PARAM_SPEC_UINT (pspec)->minimum;
+          maximum = G_PARAM_SPEC_UINT (pspec)->maximum;
+        }
+      else /* random */
+        {
+          minimum = 0;
+          maximum = 1000;
+        }
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      g_object_get (instance, pspec->name, &value, NULL);
+      g_object_set (instance, pspec->name, value, NULL);
+
+      g_assert_cmpint (data.count, ==, 0);
+
+      for (i = minimum; i <= maximum; i++)
+        {
+          g_object_get (instance, pspec->name, &value, NULL);
+          if (value == i)
+            continue;
+
+          current_count = data.count + 1;
+          g_object_set (instance, pspec->name, i, NULL);
+          g_assert_cmpint (data.count, ==, current_count);  
+
+          if (current_count == 10) /* just test a few */
+            break;
+        }
+
+      g_signal_handler_disconnect (instance, id);
+    }
+  else if (pspec->value_type == G_TYPE_STRING)
+    {
+      NotifyData data;
+      gulong id;
+      gchar *value;
+      gchar *new_value;
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      g_object_get (instance, pspec->name, &value, NULL);
+      /* don't check redundant notifications */
+
+      new_value = g_strconcat ("(", value, ".", value, ")", NULL);
+
+      g_object_set (instance, pspec->name, new_value, NULL);
+
+      g_assert_cmpint (data.count, ==, 1);
+
+      g_free (value);
+      g_free (new_value);
+
+      g_signal_handler_disconnect (instance, id);
+    }
+  else if (pspec->value_type == G_TYPE_DOUBLE)
+    {
+      GParamSpecDouble *p = G_PARAM_SPEC_DOUBLE (pspec);
+      guint i;
+      NotifyData data;
+      gulong id;
+      gdouble value;
+      gdouble new_value;
+      gint current_count;
+      gdouble delta;
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      /* don't check redundant notifications */
+      g_object_get (instance, pspec->name, &value, NULL);
+      
+      if (p->maximum > 100 || p->minimum < -100)
+        delta = M_PI;
+      else
+        delta = (p->maximum - p->minimum) / 10.0;
+
+      new_value = p->minimum;
+      for (i = 0; i < 10; i++)
+        {
+          new_value += delta;
+
+          if (fabs (value - new_value) < p->epsilon)
+            continue;
+
+          if (new_value > p->maximum)
+            break;
+
+          current_count = data.count + 1;
+          g_object_set (instance, pspec->name, new_value, NULL);
+          g_assert_cmpint (data.count, ==, current_count);  
+        }
+
+      g_signal_handler_disconnect (instance, id);
+    }
+  else if (pspec->value_type == G_TYPE_FLOAT)
+    {
+      GParamSpecFloat *p = G_PARAM_SPEC_FLOAT (pspec);
+      guint i;
+      NotifyData data;
+      gulong id;
+      gfloat value;
+      gfloat new_value;
+      gint current_count;
+
+      data.name = pspec->name;
+      data.count = 0;
+      id = g_signal_connect (instance, "notify", G_CALLBACK (count_notify), &data);
+
+      /* don't check redundant notifications */
+      g_object_get (instance, pspec->name, &value, NULL);
+      
+      new_value = p->minimum;
+      for (i = 0; i < 10; i++)
+        {
+          if (fabs (value - new_value) < p->epsilon)
+            continue;
+
+          current_count = data.count + 1;
+          new_value += (p->maximum - p->minimum) / 10.0;
+
+          if (new_value > p->maximum)
+            break;
+
+          g_object_set (instance, pspec->name, new_value, NULL);
+          g_assert_cmpint (data.count, ==, current_count);  
+        }
+
+      g_signal_handler_disconnect (instance, id);
+    }
+  else
+    {
+      if (g_test_verbose ())
+        g_print ("Skipping property %s.%s of type %s\n", g_type_name (pspec->owner_type), pspec->name, 
g_type_name (pspec->value_type));
+    }
+}
+
+static void
+test_type (gconstpointer data)
+{
+  GObjectClass *klass;
+  GObject *instance;
+  GParamSpec **pspecs;
+  guint n_pspecs, i;
+  GType type;
+  GdkDisplay *display;
+
+  type = * (GType *) data;
+
+  display = gdk_display_get_default ();
+
+  if (!G_TYPE_IS_CLASSED (type))
+    return;
+
+  if (G_TYPE_IS_ABSTRACT (type))
+    return;
+
+  if (!g_type_is_a (type, G_TYPE_OBJECT))
+    return;
+
+  /* non-GTK+ */
+  if (g_str_equal (g_type_name (type), "AtkObject") ||
+      g_str_equal (g_type_name (type), "GdkPixbufSimpleAnim"))
+    return;
+
+  /* Deprecated, not getting fixed */
+  if (g_str_equal (g_type_name (type), "GtkColorSelection") ||
+      g_str_equal (g_type_name (type), "GtkHandleBox") ||
+      g_str_equal (g_type_name (type), "GtkHPaned") ||
+      g_str_equal (g_type_name (type), "GtkVPaned") ||
+      g_str_equal (g_type_name (type), "GtkHScale") ||
+      g_str_equal (g_type_name (type), "GtkVScale") ||
+      g_str_equal (g_type_name (type), "GtkHScrollbar") ||
+      g_str_equal (g_type_name (type), "GtkVScrollbar") ||
+      g_str_equal (g_type_name (type), "GtkHSeparator") ||
+      g_str_equal (g_type_name (type), "GtkVSeparator") ||
+      g_str_equal (g_type_name (type), "GtkHBox") ||
+      g_str_equal (g_type_name (type), "GtkVBox") ||
+      g_str_equal (g_type_name (type), "GtkArrow") ||
+      g_str_equal (g_type_name (type), "GtkNumerableIcon") ||
+      g_str_equal (g_type_name (type), "GtkRadioAction") ||
+      g_str_equal (g_type_name (type), "GtkToggleAction") ||
+      g_str_equal (g_type_name (type), "GtkTable") ||
+      g_str_equal (g_type_name (type), "GtkUIManager") ||
+      g_str_equal (g_type_name (type), "GtkImageMenuItem"))
+    return;
+
+  /* These can't be freely constructed/destroyed */
+  if (g_type_is_a (type, GTK_TYPE_APPLICATION) ||
+      g_type_is_a (type, GDK_TYPE_PIXBUF_LOADER) ||
+#ifdef G_OS_UNIX
+      g_type_is_a (type, GTK_TYPE_PRINT_JOB) ||
+#endif
+      g_type_is_a (type, gdk_pixbuf_simple_anim_iter_get_type ()) ||
+      g_str_equal (g_type_name (type), "GdkX11DeviceManagerXI2") ||
+      g_str_equal (g_type_name (type), "GdkX11Display") ||
+      g_str_equal (g_type_name (type), "GdkX11DisplayManager") ||
+      g_str_equal (g_type_name (type), "GdkX11Screen"))
+    return;
+
+  /* This throws a critical when the connection is dropped */
+  if (g_type_is_a (type, GTK_TYPE_APP_CHOOSER_DIALOG))
+    return;
+
+  /* These leak their GDBusConnections */
+  if (g_type_is_a (type, GTK_TYPE_FILE_CHOOSER_BUTTON) ||
+      g_type_is_a (type, GTK_TYPE_FILE_CHOOSER_DIALOG) ||
+      g_type_is_a (type, GTK_TYPE_FILE_CHOOSER_WIDGET) ||
+      g_type_is_a (type, GTK_TYPE_PLACES_SIDEBAR))
+    return;
+ 
+  klass = g_type_class_ref (type);
+
+  if (g_type_is_a (type, GTK_TYPE_SETTINGS))
+    instance = g_object_ref (gtk_settings_get_default ());
+  else if (g_type_is_a (type, GDK_TYPE_WINDOW))
+    {
+      GdkWindowAttr attributes;
+      attributes.wclass = GDK_INPUT_OUTPUT;
+      attributes.window_type = GDK_WINDOW_TEMP;
+      attributes.event_mask = 0;
+      attributes.width = 100;
+      attributes.height = 100;
+      instance = g_object_ref (gdk_window_new (NULL, &attributes, 0));
+    }
+  else if (g_str_equal (g_type_name (type), "GdkX11Cursor"))
+    instance = g_object_new (type, "display", display, NULL);
+  else
+    instance = g_object_new (type, NULL);
+
+  if (g_type_is_a (type, G_TYPE_INITIALLY_UNOWNED))
+    g_object_ref_sink (instance);
+
+  pspecs = g_object_class_list_properties (klass, &n_pspecs);
+  for (i = 0; i < n_pspecs; ++i)
+    {
+      GParamSpec *pspec = pspecs[i];
+
+      if ((pspec->flags & G_PARAM_READABLE) == 0)
+       continue;
+
+      if ((pspec->flags & G_PARAM_WRITABLE) == 0)
+        continue;
+
+      if ((pspec->flags & G_PARAM_CONSTRUCT_ONLY) != 0)
+        continue;
+
+      /* non-GTK+ */
+      if (g_str_equal (g_type_name (pspec->owner_type), "AtkObject") ||
+          g_str_equal (g_type_name (pspec->owner_type), "GdkPixbufSimpleAnim") || 
+          g_str_equal (g_type_name (pspec->owner_type), "GMountOperation")) 
+        continue;
+
+      /* set properties are best skipped */
+      if (pspec->value_type == G_TYPE_BOOLEAN &&
+          g_str_has_suffix (pspec->name, "-set"))
+        continue;
+
+      /* These are special */
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_WIDGET) &&
+         (g_str_equal (pspec->name, "has-focus") ||
+          g_str_equal (pspec->name, "has-default") ||
+           g_str_equal (pspec->name, "is-focus") ||
+           g_str_equal (pspec->name, "margin") ||
+           g_str_equal (pspec->name, "hexpand") ||
+           g_str_equal (pspec->name, "vexpand") ||
+           g_str_equal (pspec->name, "expand")
+            ))
+       continue;
+
+      if (type == GTK_TYPE_SETTINGS)
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_MENU_ITEM) &&
+         g_str_equal (pspec->name, "accel-path"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_MENU) &&
+         (g_str_equal (pspec->name, "accel-path") ||
+          g_str_equal (pspec->name, "active")))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_CHECK_MENU_ITEM) &&
+         g_str_equal (pspec->name, "active"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_COLOR_CHOOSER) &&
+         g_str_equal (pspec->name, "show-editor"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_NOTEBOOK) &&
+         g_str_equal (pspec->name, "page"))
+        continue;
+
+      /* Not supported in subclass */
+      if (g_str_equal (g_type_name (type), "GtkRecentAction") &&
+         g_str_equal (pspec->name, "select-multiple"))
+        continue;
+
+      if (g_str_equal (g_type_name (type), "GtkRecentChooserMenu") &&
+         g_str_equal (pspec->name, "select-multiple"))
+        continue;
+
+      /* Really a bug in the way GtkButton and its subclasses interact:
+       * setting label etc on a subclass destroys the content, breaking
+       * e.g. GtkColorButton pretty badly
+       */
+      if (type == GTK_TYPE_COLOR_BUTTON && pspec->owner_type == GTK_TYPE_BUTTON)
+        continue;
+
+      /* GdkOffscreenWindow is missing many implementations */
+      if (type == GTK_TYPE_OFFSCREEN_WINDOW)
+        continue;
+
+      /* Too many special cases involving -set properties */
+      if (g_str_equal (g_type_name (pspec->owner_type), "GtkCellRendererText") ||
+          g_str_equal (g_type_name (pspec->owner_type), "GtkTextTag"))
+        continue;
+
+      /* Most things assume a model is set */
+      if (g_str_equal (g_type_name (pspec->owner_type), "GtkComboBox"))
+        continue;
+
+      /* Deprecated, not getting fixed */
+      if (g_str_equal (g_type_name (pspec->owner_type), "GtkActivatable") ||
+          g_str_equal (g_type_name (pspec->owner_type), "GtkActionGroup") ||
+          g_str_equal (g_type_name (pspec->owner_type), "GtkAction"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_CONTAINER) &&
+         g_str_equal (pspec->name, "resize-mode"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_COLOR_BUTTON) &&
+         g_str_equal (pspec->name, "alpha"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_CELL_RENDERER_PIXBUF) &&
+         (g_str_equal (pspec->name, "follow-state") ||
+          g_str_equal (pspec->name, "stock-id") ||
+           g_str_equal (pspec->name, "stock-size") ||
+           g_str_equal (pspec->name, "stock-detail")))
+        continue;
+
+       if (g_str_equal (g_type_name (pspec->owner_type), "GtkArrow") ||
+          g_str_equal (g_type_name (pspec->owner_type), "GtkAlignment") ||
+          g_str_equal (g_type_name (pspec->owner_type), "GtkMisc"))
+        continue;
+
+      if (g_type_is_a (pspec->owner_type, GTK_TYPE_MENU) &&
+         g_str_equal (pspec->name, "tearoff-state"))
+        continue;
+
+      /* Can only be set on window widgets */
+      if (pspec->owner_type == GTK_TYPE_WIDGET &&
+          g_str_equal (pspec->name, "events"))
+        continue;
+
+      /* Can only be set on unmapped windows */
+      if (pspec->owner_type == GTK_TYPE_WINDOW &&
+          g_str_equal (pspec->name, "type-hint"))
+        continue;
+
+      /* Special restrictions on allowed values */
+      if (pspec->owner_type == GTK_TYPE_COMBO_BOX &&
+          (g_str_equal (pspec->name, "row-span-column") ||
+           g_str_equal (pspec->name, "column-span-column") ||
+           g_str_equal (pspec->name, "id-column") ||
+           g_str_equal (pspec->name, "active-id") ||
+           g_str_equal (pspec->name, "entry-text-column")))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_ENTRY_COMPLETION &&
+          g_str_equal (pspec->name, "text-column"))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_PRINT_OPERATION &&
+          (g_str_equal (pspec->name, "current-page") ||
+           g_str_equal (pspec->name, "n-pages")))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_RANGE &&
+          g_str_equal (pspec->name, "fill-level"))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_SPIN_BUTTON &&
+          g_str_equal (pspec->name, "value"))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_STACK &&
+          g_str_equal (pspec->name, "visible-child-name"))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_TEXT_VIEW &&
+          g_str_equal (pspec->name, "im-module"))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_TOOLBAR &&
+          g_str_equal (pspec->name, "icon-size"))
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_TREE_SELECTION &&
+          g_str_equal (pspec->name, "mode")) /* requires a treeview */
+        continue;
+
+      if (pspec->owner_type == GTK_TYPE_TREE_VIEW &&
+          g_str_equal (pspec->name, "headers-clickable")) /* requires columns */
+        continue;
+
+      /* This one has a special-purpose default value */
+      if (g_type_is_a (type, GTK_TYPE_DIALOG) &&
+         g_str_equal (pspec->name, "use-header-bar"))
+       continue;
+
+      if (g_type_is_a (type, GTK_TYPE_ASSISTANT) &&
+         g_str_equal (pspec->name, "use-header-bar"))
+       continue;
+
+      if (g_test_verbose ())
+        g_print ("Property %s.%s\n", g_type_name (pspec->owner_type), pspec->name);
+
+      check_property (instance, pspec);
+    }
+  g_free (pspecs);
+
+  if (g_type_is_a (type, GDK_TYPE_WINDOW))
+    gdk_window_destroy (GDK_WINDOW (instance));
+  else
+    g_object_unref (instance);
+
+  g_type_class_unref (klass);
+}
+
+int
+main (int argc, char **argv)
+{
+  const GType *otypes;
+  guint i;
+  gchar *schema_dir;
+  GTestDBus *bus;
+  gint result;
+
+  /* These must be set before before gtk_test_init */
+  g_setenv ("GIO_USE_VFS", "local", TRUE);
+  g_setenv ("GSETTINGS_BACKEND", "memory", TRUE);
+
+  gtk_test_init (&argc, &argv);
+  gtk_test_register_all_types();
+
+  /* g_test_build_filename must be called after gtk_test_init */
+  schema_dir = g_test_build_filename (G_TEST_BUILT, "", NULL);
+  g_setenv ("GSETTINGS_SCHEMA_DIR", schema_dir, TRUE);
+
+  /* Create one test bus for all tests, as we have a lot of very small
+   * and quick tests.
+   */
+  bus = g_test_dbus_new (G_TEST_DBUS_NONE);
+  g_test_dbus_up (bus);
+
+  otypes = gtk_test_list_all_types (NULL);
+  for (i = 0; otypes[i]; i++)
+    {
+      gchar *testname;
+
+      testname = g_strdup_printf ("/Notification/%s", g_type_name (otypes[i]));
+      g_test_add_data_func (testname, &otypes[i], test_type);
+      g_free (testname);
+    }
+
+  result = g_test_run ();
+
+  g_test_dbus_down (bus);
+  g_object_unref (bus);
+  g_free (schema_dir);
+
+  return result;
+}