[glib] gdbus-connection: Work around race in connection tests

[Stefan Walter <stefw src gnome org>]

commit e6456bcfb682113b2b623e9ccd9bcec46626e4ed
Author: Stef Walter <stefw gnome org>
Date:   Wed Dec 4 12:48:53 2013 +0100

    gdbus-connection: Work around race in connection tests
    
    GDBusConnection cleanup is inherently racy due to its use of worker
    threads. Put tests that expect a NULL G_BUS_TYPE_SESSION singleton
    as the first tests to work around cleanup races.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=719837

 gio/tests/gdbus-connection.c |   30 ++++++++++++++++++++----------
 1 files changed, 20 insertions(+), 10 deletions(-)
---
diff --git a/gio/tests/gdbus-connection.c b/gio/tests/gdbus-connection.c
index a041acb..b3a5120 100644
--- a/gio/tests/gdbus-connection.c
+++ b/gio/tests/gdbus-connection.c
@@ -121,6 +121,23 @@ a_gdestroynotify_that_sets_a_gboolean_to_true_and_quits_loop (gpointer user_data
 }
 
 static void
+test_connection_bus_failure (void)
+{
+  GDBusConnection *c;
+  GError *error = NULL;
+
+  /*
+   * Check for correct behavior when no bus is present
+   *
+   */
+  c = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
+  g_assert (error != NULL);
+  g_assert (!g_dbus_error_is_remote_error (error));
+  g_assert (c == NULL);
+  g_error_free (error);
+}
+
+static void
 test_connection_life_cycle (void)
 {
   gboolean ret;
@@ -137,16 +154,6 @@ test_connection_life_cycle (void)
   error = NULL;
 
   /*
-   * Check for correct behavior when no bus is present
-   *
-   */
-  c = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
-  g_assert (error != NULL);
-  g_assert (!g_dbus_error_is_remote_error (error));
-  g_assert (c == NULL);
-  g_error_free (error);
-
-  /*
    *  Check for correct behavior when a bus is present
    */
   session_bus_up ();
@@ -1227,6 +1234,9 @@ main (int   argc,
 
   g_test_dbus_unset ();
 
+  /* gdbus cleanup is pretty racy due to worker threads, so always do this test first */
+  g_test_add_func ("/gdbus/connection/bus-failure", test_connection_bus_failure);
+
   g_test_add_func ("/gdbus/connection/basic", test_connection_basic);
   g_test_add_func ("/gdbus/connection/life-cycle", test_connection_life_cycle);
   g_test_add_func ("/gdbus/connection/send", test_connection_send);