Add support for plugin tests

Add a GSDTestCase Python class (tests/gsdtestcase.py) which provides
functionality for writing daemon and plugin tests:

 * Launch temporary private session and system D-BUSes to avoid disturbing
   the currently running system and being able to use mock D-BUS services.

 * Run a minimal gnome-session to ensure plugins can check the session idle
   status, register to the session, etc.

 * Configure temporary local XDG directories to avoid disturbing the user's
   real settings and files.

 * Run a mock notification daemon to avoid showing notifications produced
   by test cases, using python-dbusmock.
   (http://pypi.python.org/pypi/python-dbusmock)

 * Provide API to start/stop a mock logind, using python-dbusmock.

 * Provide API to reste the session idle timer, using a small "shiftkey"
   helper program that sends a "left shift key" event through XTest.

If any of the required dependencies (gnome-session, dbusmock, pygobject) is
not present, it exits with an error message and exit code 0, to avoid
breaking tests in minimal build environments.

https://bugzilla.gnome.org/show_bug.cgi?id=685951

1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index 6bb3d580..e7ae0305 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,6 +5,7 @@ SUBDIRS = 			\
 	plugins			\
 	data			\
 	po 			\
+	tests 			\
 	$(NULL)
 
 if ENABLE_MAN