Added some doc to tester

tests/tester.py

@@ -27,6 +27,9 @@ Please contact UbiCast sales team (sales@ubicast.eu) to renew the support contra
 
 
 class Logger(object):
+    '''
+    Class to duplicate output in a buffer
+    '''
     def __init__(self, stream, log_buffer):
         self.stream = stream
         self.log_buffer = log_buffer
@@ -47,6 +50,9 @@ sys.stderr = sys.stdout
 
 
 def raid_idle():
+    '''
+    Function to test that the RAID is not running any task
+    '''
     idle = True
     devs = glob.glob('/sys/block/md*/md/sync_action')
     for d in devs:
@@ -59,6 +65,9 @@ def raid_idle():
 
 
 class Tester():
+    '''
+    Main tester class
+    '''
     MAX_LOG_FILES = 50
 
     def __init__(self):