Add window manager test

tests/test-window-manager.py

@@ -0,0 +1,28 @@
+#!/usr/bin/python
+import pygtk
+pygtk.require('2.0')
+
+from sugar.session.UITestSession import UITestSession
+
+session = UITestSession()
+session.start()
+
+import gtk
+
+def _show_dialog(window):
+	dialog = gtk.Dialog(title='No Unviewed Media', 
+						parent=window, flags=gtk.DIALOG_MODAL, 
+        	            buttons=(gtk.STOCK_OK, gtk.RESPONSE_ACCEPT))
+	label = gtk.Label('There is no unviewed media to download.')
+	dialog.vbox.pack_start(label, True, True, 0)
+	label.show()
+	response = dialog.run()
+	dialog.hide()
+	del dialog
+
+window = gtk.Window()
+window.show()
+
+_show_dialog(window)
+
+gtk.main()