[gnome-settings-daemon] rfkill: Add a comment with basic testing instructions

[Bastien Nocera <hadess src gnome org>]

commit 0da930316569c77ce6a6dbcb5f236ebee1fb0738
Author: Philip Withnall <withnall endlessm com>
Date:   Thu Feb 9 14:25:50 2017 +0000

    rfkill: Add a comment with basic testing instructions
    
    As much as I would love to, I don’t have time to write a unit testing
    harness which mocks up a slow rfkill FD. So this will have to do.
    
    Suggestion: run it in a tight loop, alternating between enabled and
    disabled. See what breaks.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=778383

 plugins/rfkill/gsd-rfkill-manager.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/plugins/rfkill/gsd-rfkill-manager.c b/plugins/rfkill/gsd-rfkill-manager.c
index 5470ce7..6e6e130 100644
--- a/plugins/rfkill/gsd-rfkill-manager.c
+++ b/plugins/rfkill/gsd-rfkill-manager.c
@@ -20,6 +20,26 @@
  *
  */
 
+/* Test with:
+ *    gdbus call \
+ *        --session \
+ *        --dest org.gnome.SettingsDaemon.Rfkill \
+ *        --object-path /org/gnome/SettingsDaemon/Rfkill \
+ *        --method org.freedesktop.DBus.Properties.Set \
+ *        "org.gnome.SettingsDaemon.Rfkill" \
+ *        "AirplaneMode" \
+ *        "<true|false>"
+ * and
+ *    gdbus call \
+ *        --session \
+ *        --dest org.gnome.SettingsDaemon.Rfkill \
+ *        --object-path /org/gnome/SettingsDaemon/Rfkill \
+ *        --method org.freedesktop.DBus.Properties.Set \
+ *        "org.gnome.SettingsDaemon.Rfkill" \
+ *        "BluetoothAirplaneMode" \
+ *        "<true|false>"
+ */
+
 #include "config.h"
 
 #include <gio/gio.h>