[glib/benzea/systemd-transient-scope] tests: Iterate mainloop during launch test

[Benjamin Berg <bberg src gnome org>]

commit 2a593165d33279b0674efaba6ff4952b9e0b7c4a
Author: Benjamin Berg <bberg redhat com>
Date:   Fri Oct 23 18:20:01 2020 +0200

    tests: Iterate mainloop during launch test
    
    When launching an application, we wait for the DBus response from
    systemd before executing the binary. Because of this the main loop needs
    to be iterated for spawning to completed and the file to be created.

 gio/tests/desktop-app-info.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gio/tests/desktop-app-info.c b/gio/tests/desktop-app-info.c
index f4e509a59..dbabc4895 100644
--- a/gio/tests/desktop-app-info.c
+++ b/gio/tests/desktop-app-info.c
@@ -334,6 +334,7 @@ wait_for_file (const gchar *want_this,
    */
   while (access (want_this, F_OK) != 0)
     {
+      g_main_context_iteration (NULL, FALSE);
       g_usleep (100000); /* 100ms */
       g_assert_cmpuint (retries, >, 0);
       retries--;