Clean transactions based on time. Add HttpTransactionCache tests.

1 files changed, 9 insertions, 1 deletions

diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index 2b3f0bef3c..c05b9450be 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -34,7 +34,7 @@ class Clock(object):
     """A small utility that obtains current time-of-day so that time may be
     mocked during unit-tests.
 
-    TODO(paul): Also move the sleep() functionallity into it
+    TODO(paul): Also move the sleep() functionality into it
     """
 
     def time(self):
@@ -46,6 +46,14 @@ class Clock(object):
         return int(self.time() * 1000)
 
     def looping_call(self, f, msec):
+        """Call a function repeatedly.
+
+         Waits `msec` initially before calling `f` for the first time.
+
+        Args:
+            f(function): The function to call repeatedly.
+            msec(float): How long to wait between calls in milliseconds.
+        """
         l = task.LoopingCall(f)
         l.start(msec / 1000.0, now=False)
         return l