[CalendarServer-changes] [15300] CalendarServer/trunk/contrib/performance/loadtest

source_changes at macosforge.org source_changes at macosforge.org
Mon Nov 9 16:00:49 PST 2015


Revision: 15300
          http://trac.calendarserver.org//changeset/15300
Author:   sagen at apple.com
Date:     2015-11-09 16:00:49 -0800 (Mon, 09 Nov 2015)
Log Message:
-----------
Client sim fixes:  don't try to modify or attach to a scheduled event; adds an AlarmAcknowledger profile that stampedes at specified times past the hour

Modified Paths:
--------------
    CalendarServer/trunk/contrib/performance/loadtest/clients.plist
    CalendarServer/trunk/contrib/performance/loadtest/profiles.py
    CalendarServer/trunk/contrib/performance/loadtest/test_profiles.py

Modified: CalendarServer/trunk/contrib/performance/loadtest/clients.plist
===================================================================
--- CalendarServer/trunk/contrib/performance/loadtest/clients.plist	2015-11-07 04:54:31 UTC (rev 15299)
+++ CalendarServer/trunk/contrib/performance/loadtest/clients.plist	2015-11-10 00:00:49 UTC (rev 15300)
@@ -80,7 +80,7 @@
 							<!-- Define the interval (in seconds) at which this profile will use
 								its client to create a new event. -->
 							<key>interval</key>
-							<integer>60</integer>
+							<integer>120</integer>
 
 							<!-- Define how start times (DTSTART) for the randomly generated events
 								will be selected. This is an example of a "Distribution" parameter. The value
@@ -172,23 +172,30 @@
 
 					<!-- This profile will create a new event, and then periodically update the ACKNOWLEDGED property. -->
 
-					<!-- Rather than use EventUpdater which always updates the same event,
-					you can use Eventer to create events and TitleChanger or Attacher to change
-					random events -->
 					<dict>
 						<key>class</key>
-						<string>contrib.performance.loadtest.profiles.EventUpdater</string>
+						<string>contrib.performance.loadtest.profiles.AlarmAcknowledger</string>
 
 						<key>params</key>
 						<dict>
 							<key>enabled</key>
-							<false/>
+							<true/>
 
-							<!-- Define the interval (in seconds) at which this profile will use
-								its client to create a new event. -->
+							<!-- Define how often to check (in seconds) whether it's
+							time to do an alarm acknowledgement -->
 							<key>interval</key>
-							<integer>5</integer>
+							<integer>15</integer>
 
+							<!-- Acknowledgements will only actually occur at one of these
+							minutes past the hour: -->
+							<key>pastTheHour</key>
+							<array>
+								<integer>0</integer>
+								<integer>15</integer>
+								<integer>30</integer>
+								<integer>45</integer>
+							</array>
+
 							<!-- Define how start times (DTSTART) for the randomly generated events
 								will be selected. This is an example of a "Distribution" parameter. The value
 								for most "Distribution" parameters are interchangeable and extensible. -->
@@ -290,7 +297,7 @@
 							<!-- Define the interval (in seconds) at which this profile will use
 								its client to create a new event. -->
 							<key>interval</key>
-							<integer>60</integer>
+							<integer>120</integer>
 
 						</dict>
 					</dict>
@@ -308,7 +315,7 @@
 							<!-- Define the interval (in seconds) at which this profile will use
 								its client to create a new event. -->
 							<key>interval</key>
-							<integer>60</integer>
+							<integer>120</integer>
 
 							<!-- Define the attachment size distribution. -->
 							<key>fileSizeDistribution</key>
@@ -373,12 +380,12 @@
 					<!-- This profile invites some number of new attendees to new events. -->
 					<dict>
 						<key>class</key>
-						<string>contrib.performance.loadtest.profiles.RealisticInviter</string>
+						<string>contrib.performance.loadtest.profiles.Inviter</string>
 
 						<key>params</key>
 						<dict>
 							<key>enabled</key>
-							<false/>
+							<true/>
 
 							<!-- Define the frequency at which new invitations will be sent out. -->
 							<key>sendInvitationDistribution</key>
@@ -389,7 +396,7 @@
 								<dict>
 									<!-- mu gives the mean of the normal distribution (in seconds). -->
 									<key>mu</key>
-									<integer>10</integer>
+									<integer>120</integer>
 
 									<!-- and sigma gives its standard deviation. -->
 									<key>sigma</key>

Modified: CalendarServer/trunk/contrib/performance/loadtest/profiles.py
===================================================================
--- CalendarServer/trunk/contrib/performance/loadtest/profiles.py	2015-11-07 04:54:31 UTC (rev 15299)
+++ CalendarServer/trunk/contrib/performance/loadtest/profiles.py	2015-11-10 00:00:49 UTC (rev 15300)
@@ -31,7 +31,7 @@
 from twisted.python import context
 from twisted.python.log import msg
 from twisted.python.failure import Failure
-from twisted.internet.defer import Deferred, succeed, fail, inlineCallbacks, returnValue
+from twisted.internet.defer import Deferred, succeed, inlineCallbacks, returnValue
 from twisted.internet.task import LoopingCall
 from twisted.web.http import PRECONDITION_FAILED
 
@@ -45,6 +45,8 @@
 from pycalendar.datetime import DateTime
 from pycalendar.duration import Duration
 
+from datetime import datetime
+
 class ProfileBase(object):
     """
     Base class which provides some conveniences for profile
@@ -114,6 +116,9 @@
                 event = calendar.events[href]
                 if not event.component:
                     continue
+                if event.scheduleTag:
+                    continue
+
                 return event
         return None
 
@@ -213,125 +218,9 @@
 
 
 
+
 class Inviter(ProfileBase):
     """
-    A Calendar user who invites and de-invites other users to events.
-    """
-    def setParameters(
-        self,
-        enabled=True,
-        sendInvitationDistribution=NormalDistribution(600, 60),
-        inviteeDistribution=UniformDiscreteDistribution(range(-10, 11))
-    ):
-        self.enabled = enabled
-        self._sendInvitationDistribution = sendInvitationDistribution
-        self._inviteeDistribution = inviteeDistribution
-
-
-    def run(self):
-        return loopWithDistribution(
-            self._reactor, self._sendInvitationDistribution, self._invite)
-
-
-    def _addAttendee(self, event, attendees):
-        """
-        Create a new attendee to add to the list of attendees for the
-        given event.
-        """
-        selfRecord = self._sim.getUserRecord(self._number)
-        invitees = set([u'mailto:%s' % (selfRecord.email,)])
-        for att in attendees:
-            invitees.add(att.value())
-
-        for _ignore_i in range(10):
-            invitee = max(
-                0, self._number + self._inviteeDistribution.sample())
-            try:
-                record = self._sim.getUserRecord(invitee)
-            except IndexError:
-                continue
-            cuaddr = u'mailto:%s' % (record.email,)
-            uuidx = u'urn:x-uid:%s' % (record.guid,)
-            uuid = u'urn:uuid:%s' % (record.guid,)
-            if cuaddr not in invitees and uuidx not in invitees and uuid not in invitees:
-                break
-        else:
-            return fail(CannotAddAttendee("Can't find uninvited user to invite."))
-
-        attendee = Property(
-            name=u'ATTENDEE',
-            value=cuaddr.encode("utf-8"),
-            params={
-                'CN': record.commonName,
-                'CUTYPE': 'INDIVIDUAL',
-                'PARTSTAT': 'NEEDS-ACTION',
-                'ROLE': 'REQ-PARTICIPANT',
-                'RSVP': 'TRUE',
-            },
-        )
-
-        return succeed(attendee)
-
-
-    def _invite(self):
-        """
-        Try to add a new attendee to an event, or perhaps remove an
-        existing attendee from an event.
-
-        @return: C{None} if there are no events to play with,
-            otherwise a L{Deferred} which fires when the attendee
-            change has been made.
-        """
-
-        if not self._client.started:
-            return succeed(None)
-
-        # Find calendars which are eligible for invites
-        calendars = self._calendarsOfType(caldavxml.calendar, "VEVENT")
-
-        while calendars:
-            # Pick one at random from which to try to select an event
-            # to modify.
-            calendar = self.random.choice(calendars)
-            calendars.remove(calendar)
-
-            if not calendar.events:
-                continue
-
-            events = calendar.events.keys()
-            while events:
-                uuid = self.random.choice(events)
-                events.remove(uuid)
-                event = calendar.events[uuid].component
-                if event is None:
-                    continue
-
-                component = event.mainComponent()
-                organizer = component.getOrganizerProperty()
-                if organizer is not None and not self._isSelfAttendee(organizer):
-                    # This event was organized by someone else, don't try to invite someone to it.
-                    continue
-
-                href = calendar.url + uuid
-
-                # Find out who might attend
-                attendees = tuple(component.properties('ATTENDEE'))
-
-                d = self._addAttendee(event, attendees)
-                d.addCallbacks(
-                    lambda attendee:
-                        self._client.addEventAttendee(
-                            href, attendee),
-                    lambda reason: reason.trap(CannotAddAttendee))
-                return self._newOperation("invite", d)
-
-        # Oops, either no events or no calendars to play with.
-        return succeed(None)
-
-
-
-class RealisticInviter(ProfileBase):
-    """
     A Calendar user who invites other users to new events.
     """
     _eventTemplate = Component.fromString("""\
@@ -473,8 +362,7 @@
                 try:
                     self._addAttendee(vevent, attendees)
                 except CannotAddAttendee:
-                    self._failedOperation("invite", "Cannot add attendee")
-                    return succeed(None)
+                    continue
 
             href = '%s%s.ics' % (calendar.url, uid)
             d = self._client.addInvite(href, vcalendar)
@@ -868,10 +756,7 @@
 
 
 
-# Is the purpose of this profile "EventUpdater" simply to keep updating the same
-# resource over and over?
-
-class EventUpdater(ProfileBase):
+class AlarmAcknowledger(ProfileBase):
     """
     A Calendar user who creates a new event, and then updates its alarm.
     """
@@ -903,7 +788,8 @@
     def setParameters(
         self,
         enabled=True,
-        interval=25,
+        interval=5,
+        pastTheHour=[0, 15, 30, 45],
         eventStartDistribution=NearFutureDistribution(),
         eventDurationDistribution=UniformDiscreteDistribution([
             15 * 60, 30 * 60,
@@ -914,9 +800,11 @@
     ):
         self.enabled = enabled
         self._interval = interval
+        self._pastTheHour = pastTheHour
         self._eventStartDistribution = eventStartDistribution
         self._eventDurationDistribution = eventDurationDistribution
         self._recurrenceDistribution = recurrenceDistribution
+        self._lastMinuteChecked = -1
 
 
     def initialize(self):
@@ -925,6 +813,7 @@
 
         @return: a L{Deferred} that fires when initialization is done
         """
+
         return self._initEvent()
 
 
@@ -968,16 +857,35 @@
         return self._newOperation("create", d)
 
 
+    def _shouldUpdate(self, minutePastTheHour):
+        """
+        We want to only acknowledge our alarm at the "past the hour" minutes
+        we've been configured for.
+        """
+        should = False
+        if minutePastTheHour in self._pastTheHour:
+            # This is one of the minutes we should update on, but only update
+            # as we pass into this minute, and not subsequent times
+            if minutePastTheHour != self._lastMinuteChecked:
+                should = True
+
+        self._lastMinuteChecked = minutePastTheHour
+        return should
+
+
     def _updateEvent(self):
         """
-        Try to add a new attendee to an event, or perhaps remove an
-        existing attendee from an event.
+        Set the ACKNOWLEDGED property on an event.
 
         @return: C{None} if there are no events to play with,
-            otherwise a L{Deferred} which fires when the attendee
+            otherwise a L{Deferred} which fires when the acknowledged
             change has been made.
         """
 
+        # Only do updates when we reach of the designated minutes past the hour
+        if not self._shouldUpdate(datetime.now().minute):
+            return succeed(None)
+
         if not self._client.started:
             return succeed(None)
 

Modified: CalendarServer/trunk/contrib/performance/loadtest/test_profiles.py
===================================================================
--- CalendarServer/trunk/contrib/performance/loadtest/test_profiles.py	2015-11-07 04:54:31 UTC (rev 15299)
+++ CalendarServer/trunk/contrib/performance/loadtest/test_profiles.py	2015-11-10 00:00:49 UTC (rev 15300)
@@ -31,8 +31,7 @@
 
 from twistedcaldav.ical import Component, Property
 
-from contrib.performance.loadtest.profiles import Eventer, Inviter, Accepter, OperationLogger
-from contrib.performance.loadtest.profiles import RealisticInviter
+from contrib.performance.loadtest.profiles import Eventer, Inviter, Accepter, OperationLogger, AlarmAcknowledger
 from contrib.performance.loadtest.population import Populator, CalendarClientSimulator
 from contrib.performance.loadtest.ical import IncorrectResponseCode, Calendar, Event, BaseClient
 from contrib.performance.loadtest.sim import _DirectoryRecord
@@ -340,209 +339,212 @@
         return self.values.pop(0)
 
 
+# These were for the old Inviter class, before RealisticInviter was renamed
+# to Inviter.  Keeping them around in case there are some we want to copy
+# over to the new Inviter:
+#
+# class InviterTests(TestCase):
+#     """
+#     Tests for loadtest.profiles.Inviter.
+#     """
+#     def setUp(self):
+#         self.sim = CalendarClientSimulator(
+#             AnyUser(), Populator(None), None, None, None, None, None, None)
 
-class InviterTests(TestCase):
-    """
-    Tests for loadtest.profiles.Inviter.
-    """
-    def setUp(self):
-        self.sim = CalendarClientSimulator(
-            AnyUser(), Populator(None), None, None, None, None, None, None)
 
+#     def _simpleAccount(self, userNumber, eventText):
+#         client = StubClient(userNumber, self.mktemp())
 
-    def _simpleAccount(self, userNumber, eventText):
-        client = StubClient(userNumber, self.mktemp())
+#         vevent = Component.fromString(eventText)
+#         calendar = Calendar(
+#             caldavxml.calendar, set(('VEVENT',)), u'calendar', u'/cal/', None)
+#         client._calendars.update({calendar.url: calendar})
 
-        vevent = Component.fromString(eventText)
-        calendar = Calendar(
-            caldavxml.calendar, set(('VEVENT',)), u'calendar', u'/cal/', None)
-        client._calendars.update({calendar.url: calendar})
+#         event = Event(client.serializeLocation(), calendar.url + u'1234.ics', None, vevent)
 
-        event = Event(client.serializeLocation(), calendar.url + u'1234.ics', None, vevent)
+#         client._events.update({event.url: event})
+#         calendar.events = {u'1234.ics': event}
 
-        client._events.update({event.url: event})
-        calendar.events = {u'1234.ics': event}
+#         return vevent, event, calendar, client
 
-        return vevent, event, calendar, client
 
+#     def test_enabled(self):
+#         userNumber = 13
+#         client = StubClient(userNumber, self.mktemp())
 
-    def test_enabled(self):
-        userNumber = 13
-        client = StubClient(userNumber, self.mktemp())
+#         inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": False})
+#         self.assertEqual(inviter.enabled, False)
 
-        inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": False})
-        self.assertEqual(inviter.enabled, False)
+#         inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": True})
+#         self.assertEqual(inviter.enabled, True)
 
-        inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": True})
-        self.assertEqual(inviter.enabled, True)
 
+#     def test_doNotAddAttendeeToInbox(self):
+#         """
+#         When the only calendar with any events is a schedule inbox, no
+#         attempt is made to add attendees to an event on that calendar.
+#         """
+#         userNumber = 10
+#         vevent, _ignore_event, calendar, client = self._simpleAccount(
+#             userNumber, SIMPLE_EVENT)
+#         calendar.resourceType = caldavxml.schedule_inbox
+#         inviter = Inviter(None, self.sim, client, userNumber)
+#         inviter._invite()
+#         self.assertFalse(vevent.mainComponent().hasProperty('ATTENDEE'))
 
-    def test_doNotAddAttendeeToInbox(self):
-        """
-        When the only calendar with any events is a schedule inbox, no
-        attempt is made to add attendees to an event on that calendar.
-        """
-        userNumber = 10
-        vevent, _ignore_event, calendar, client = self._simpleAccount(
-            userNumber, SIMPLE_EVENT)
-        calendar.resourceType = caldavxml.schedule_inbox
-        inviter = Inviter(None, self.sim, client, userNumber)
-        inviter._invite()
-        self.assertFalse(vevent.mainComponent().hasProperty('ATTENDEE'))
 
+#     def test_doNotAddAttendeeToNoCalendars(self):
+#         """
+#         When there are no calendars and no events at all, the inviter
+#         does nothing.
+#         """
+#         userNumber = 13
+#         client = StubClient(userNumber, self.mktemp())
+#         inviter = Inviter(None, self.sim, client, userNumber)
+#         inviter._invite()
+#         self.assertEquals(client._events, {})
+#         self.assertEquals(client._calendars, {})
 
-    def test_doNotAddAttendeeToNoCalendars(self):
-        """
-        When there are no calendars and no events at all, the inviter
-        does nothing.
-        """
-        userNumber = 13
-        client = StubClient(userNumber, self.mktemp())
-        inviter = Inviter(None, self.sim, client, userNumber)
-        inviter._invite()
-        self.assertEquals(client._events, {})
-        self.assertEquals(client._calendars, {})
 
+#     def test_doNotAddAttendeeToUninitializedEvent(self):
+#         """
+#         When there is an L{Event} on a calendar but the details of the
+#         event have not yet been retrieved, no attempt is made to add
+#         invitees to that event.
+#         """
+#         userNumber = 19
+#         _ignore_vevent, event, calendar, client = self._simpleAccount(
+#             userNumber, SIMPLE_EVENT)
+#         event.component = event.etag = event.scheduleTag = None
+#         inviter = Inviter(None, self.sim, client, userNumber)
+#         inviter._invite()
+#         self.assertEquals(client._events, {event.url: event})
+#         self.assertEquals(client._calendars, {calendar.url: calendar})
 
-    def test_doNotAddAttendeeToUninitializedEvent(self):
-        """
-        When there is an L{Event} on a calendar but the details of the
-        event have not yet been retrieved, no attempt is made to add
-        invitees to that event.
-        """
-        userNumber = 19
-        _ignore_vevent, event, calendar, client = self._simpleAccount(
-            userNumber, SIMPLE_EVENT)
-        event.component = event.etag = event.scheduleTag = None
-        inviter = Inviter(None, self.sim, client, userNumber)
-        inviter._invite()
-        self.assertEquals(client._events, {event.url: event})
-        self.assertEquals(client._calendars, {calendar.url: calendar})
 
+#     def test_addAttendeeToEvent(self):
+#         """
+#         When there is a normal calendar with an event, inviter adds an
+#         attendee to it.
+#         """
+#         userNumber = 16
+#         _ignore_vevent, event, _ignore_calendar, client = self._simpleAccount(
+#             userNumber, SIMPLE_EVENT)
+#         inviter = Inviter(Clock(), self.sim, client, userNumber)
+#         inviter.setParameters(inviteeDistribution=Deterministic(1))
+#         inviter._invite()
+#         attendees = tuple(event.component.mainComponent().properties('ATTENDEE'))
+#         self.assertEquals(len(attendees), 1)
+#         for paramname, paramvalue in {
+#             'CN': 'User %d' % (userNumber + 1,),
+#             'CUTYPE': 'INDIVIDUAL',
+#             'PARTSTAT': 'NEEDS-ACTION',
+#             'ROLE': 'REQ-PARTICIPANT',
+#             'RSVP': 'TRUE'
+#         }.items():
+#             self.assertTrue(attendees[0].hasParameter(paramname))
+#             self.assertEqual(attendees[0].parameterValue(paramname), paramvalue)
 
-    def test_addAttendeeToEvent(self):
-        """
-        When there is a normal calendar with an event, inviter adds an
-        attendee to it.
-        """
-        userNumber = 16
-        _ignore_vevent, event, _ignore_calendar, client = self._simpleAccount(
-            userNumber, SIMPLE_EVENT)
-        inviter = Inviter(Clock(), self.sim, client, userNumber)
-        inviter.setParameters(inviteeDistribution=Deterministic(1))
-        inviter._invite()
-        attendees = tuple(event.component.mainComponent().properties('ATTENDEE'))
-        self.assertEquals(len(attendees), 1)
-        for paramname, paramvalue in {
-            'CN': 'User %d' % (userNumber + 1,),
-            'CUTYPE': 'INDIVIDUAL',
-            'PARTSTAT': 'NEEDS-ACTION',
-            'ROLE': 'REQ-PARTICIPANT',
-            'RSVP': 'TRUE'
-        }.items():
-            self.assertTrue(attendees[0].hasParameter(paramname))
-            self.assertEqual(attendees[0].parameterValue(paramname), paramvalue)
 
+#     def test_doNotAddSelfToEvent(self):
+#         """
+#         If the inviter randomly selects its own user to be added to
+#         the attendee list, a different user is added instead.
+#         """
+#         selfNumber = 12
+#         _ignore_vevent, event, _ignore_calendar, client = self._simpleAccount(
+#             selfNumber, SIMPLE_EVENT)
 
-    def test_doNotAddSelfToEvent(self):
-        """
-        If the inviter randomly selects its own user to be added to
-        the attendee list, a different user is added instead.
-        """
-        selfNumber = 12
-        _ignore_vevent, event, _ignore_calendar, client = self._simpleAccount(
-            selfNumber, SIMPLE_EVENT)
+#         otherNumber = 20
+#         values = [selfNumber - selfNumber, otherNumber - selfNumber]
 
-        otherNumber = 20
-        values = [selfNumber - selfNumber, otherNumber - selfNumber]
+#         inviter = Inviter(Clock(), self.sim, client, selfNumber)
+#         inviter.setParameters(inviteeDistribution=SequentialDistribution(values))
+#         inviter._invite()
+#         attendees = tuple(event.component.mainComponent().properties('ATTENDEE'))
+#         self.assertEquals(len(attendees), 1)
+#         for paramname, paramvalue in {
+#             'CN': 'User %d' % (otherNumber,),
+#             'CUTYPE': 'INDIVIDUAL',
+#             'PARTSTAT': 'NEEDS-ACTION',
+#             'ROLE': 'REQ-PARTICIPANT',
+#             'RSVP': 'TRUE'
+#         }.items():
+#             self.assertTrue(attendees[0].hasParameter(paramname))
+#             self.assertEqual(attendees[0].parameterValue(paramname), paramvalue)
 
-        inviter = Inviter(Clock(), self.sim, client, selfNumber)
-        inviter.setParameters(inviteeDistribution=SequentialDistribution(values))
-        inviter._invite()
-        attendees = tuple(event.component.mainComponent().properties('ATTENDEE'))
-        self.assertEquals(len(attendees), 1)
-        for paramname, paramvalue in {
-            'CN': 'User %d' % (otherNumber,),
-            'CUTYPE': 'INDIVIDUAL',
-            'PARTSTAT': 'NEEDS-ACTION',
-            'ROLE': 'REQ-PARTICIPANT',
-            'RSVP': 'TRUE'
-        }.items():
-            self.assertTrue(attendees[0].hasParameter(paramname))
-            self.assertEqual(attendees[0].parameterValue(paramname), paramvalue)
 
+#     def test_doNotAddExistingToEvent(self):
+#         """
+#         If the inviter randomly selects a user which is already an
+#         invitee on the event, a different user is added instead.
+#         """
+#         selfNumber = 1
+#         _ignore_vevent, event, _ignore_calendar, client = self._simpleAccount(
+#             selfNumber, INVITED_EVENT)
 
-    def test_doNotAddExistingToEvent(self):
-        """
-        If the inviter randomly selects a user which is already an
-        invitee on the event, a different user is added instead.
-        """
-        selfNumber = 1
-        _ignore_vevent, event, _ignore_calendar, client = self._simpleAccount(
-            selfNumber, INVITED_EVENT)
+#         invitee = tuple(event.component.mainComponent().properties('ATTENDEE'))[0]
+#         inviteeNumber = int(invitee.parameterValue('CN').split()[1])
+#         anotherNumber = inviteeNumber + 5
+#         values = [inviteeNumber - selfNumber, anotherNumber - selfNumber]
 
-        invitee = tuple(event.component.mainComponent().properties('ATTENDEE'))[0]
-        inviteeNumber = int(invitee.parameterValue('CN').split()[1])
-        anotherNumber = inviteeNumber + 5
-        values = [inviteeNumber - selfNumber, anotherNumber - selfNumber]
+#         inviter = Inviter(Clock(), self.sim, client, selfNumber)
+#         inviter.setParameters(inviteeDistribution=SequentialDistribution(values))
+#         inviter._invite()
+#         attendees = tuple(event.component.mainComponent().properties('ATTENDEE'))
+#         self.assertEquals(len(attendees), 3)
+#         for paramname, paramvalue in {
+#             'CN': 'User %02d' % (anotherNumber,),
+#             'CUTYPE': 'INDIVIDUAL',
+#             'PARTSTAT': 'NEEDS-ACTION',
+#             'ROLE': 'REQ-PARTICIPANT',
+#             'RSVP': 'TRUE'
+#         }.items():
+#             self.assertTrue(attendees[2].hasParameter(paramname))
+#             self.assertEqual(attendees[2].parameterValue(paramname), paramvalue)
 
-        inviter = Inviter(Clock(), self.sim, client, selfNumber)
-        inviter.setParameters(inviteeDistribution=SequentialDistribution(values))
-        inviter._invite()
-        attendees = tuple(event.component.mainComponent().properties('ATTENDEE'))
-        self.assertEquals(len(attendees), 3)
-        for paramname, paramvalue in {
-            'CN': 'User %02d' % (anotherNumber,),
-            'CUTYPE': 'INDIVIDUAL',
-            'PARTSTAT': 'NEEDS-ACTION',
-            'ROLE': 'REQ-PARTICIPANT',
-            'RSVP': 'TRUE'
-        }.items():
-            self.assertTrue(attendees[2].hasParameter(paramname))
-            self.assertEqual(attendees[2].parameterValue(paramname), paramvalue)
 
+#     def test_everybodyInvitedAlready(self):
+#         """
+#         If the first so-many randomly selected users we come across
+#         are already attendees on the event, the invitation attempt is
+#         abandoned.
+#         """
+#         selfNumber = 1
+#         vevent, _ignore_event, _ignore_calendar, client = self._simpleAccount(
+#             selfNumber, INVITED_EVENT)
+#         inviter = Inviter(Clock(), self.sim, client, selfNumber)
+#         # Always return a user number which has already been invited.
+#         inviter.setParameters(inviteeDistribution=Deterministic(2 - selfNumber))
+#         inviter._invite()
+#         attendees = tuple(vevent.mainComponent().properties('ATTENDEE'))
+#         self.assertEquals(len(attendees), 2)
 
-    def test_everybodyInvitedAlready(self):
-        """
-        If the first so-many randomly selected users we come across
-        are already attendees on the event, the invitation attempt is
-        abandoned.
-        """
-        selfNumber = 1
-        vevent, _ignore_event, _ignore_calendar, client = self._simpleAccount(
-            selfNumber, INVITED_EVENT)
-        inviter = Inviter(Clock(), self.sim, client, selfNumber)
-        # Always return a user number which has already been invited.
-        inviter.setParameters(inviteeDistribution=Deterministic(2 - selfNumber))
-        inviter._invite()
-        attendees = tuple(vevent.mainComponent().properties('ATTENDEE'))
-        self.assertEquals(len(attendees), 2)
 
+#     def test_doNotInviteToSomeoneElsesEvent(self):
+#         """
+#         If there are events on our calendar which are being organized
+#         by someone else, the inviter does not attempt to invite new
+#         users to them.
+#         """
+#         selfNumber = 2
+#         vevent, _ignore_event, _ignore_calendar, client = self._simpleAccount(
+#             selfNumber, INVITED_EVENT)
+#         inviter = Inviter(None, self.sim, client, selfNumber)
+#         # Try to send an invitation, but with only one event on the
+#         # calendar, of which we are not the organizer.  It should be
+#         # unchanged afterwards.
+#         inviter._invite()
+#         attendees = tuple(vevent.mainComponent().properties('ATTENDEE'))
+#         self.assertEqual(len(attendees), 2)
+#         self.assertEqual(attendees[0].parameterValue('CN'), 'User 01')
+#         self.assertEqual(attendees[1].parameterValue('CN'), 'User 02')
 
-    def test_doNotInviteToSomeoneElsesEvent(self):
-        """
-        If there are events on our calendar which are being organized
-        by someone else, the inviter does not attempt to invite new
-        users to them.
-        """
-        selfNumber = 2
-        vevent, _ignore_event, _ignore_calendar, client = self._simpleAccount(
-            selfNumber, INVITED_EVENT)
-        inviter = Inviter(None, self.sim, client, selfNumber)
-        # Try to send an invitation, but with only one event on the
-        # calendar, of which we are not the organizer.  It should be
-        # unchanged afterwards.
-        inviter._invite()
-        attendees = tuple(vevent.mainComponent().properties('ATTENDEE'))
-        self.assertEqual(len(attendees), 2)
-        self.assertEqual(attendees[0].parameterValue('CN'), 'User 01')
-        self.assertEqual(attendees[1].parameterValue('CN'), 'User 02')
 
 
-
-class RealisticInviterTests(TestCase):
+class InviterTests(TestCase):
     """
-    Tests for loadtest.profiles.RealisticInviter.
+    Tests for loadtest.profiles.Inviter.
     """
     def setUp(self):
         self.sim = CalendarClientSimulator(
@@ -566,10 +568,10 @@
         userNumber = 13
         client = StubClient(userNumber, self.mktemp())
 
-        inviter = RealisticInviter(None, self.sim, client, userNumber, **{"enabled": False})
+        inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": False})
         self.assertEqual(inviter.enabled, False)
 
-        inviter = RealisticInviter(None, self.sim, client, userNumber, **{"enabled": True})
+        inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": True})
         self.assertEqual(inviter.enabled, True)
 
 
@@ -584,7 +586,7 @@
         client = StubClient(userNumber, self.mktemp())
         client._calendars.update({calendar.url: calendar})
 
-        inviter = RealisticInviter(None, self.sim, client, userNumber, **{"enabled": False})
+        inviter = Inviter(None, self.sim, client, userNumber, **{"enabled": False})
         inviter._invite()
 
         self.assertEquals(client._events, {})
@@ -597,7 +599,7 @@
         """
         userNumber = 13
         client = StubClient(userNumber, self.mktemp())
-        inviter = RealisticInviter(None, self.sim, client, userNumber)
+        inviter = Inviter(None, self.sim, client, userNumber)
         inviter._invite()
         self.assertEquals(client._events, {})
         self.assertEquals(client._calendars, {})
@@ -614,7 +616,7 @@
         os.mkdir(serializePath)
         client = StubClient(userNumber, self.mktemp())
         client._calendars.update({calendar.url: calendar})
-        inviter = RealisticInviter(Clock(), self.sim, client, userNumber)
+        inviter = Inviter(Clock(), self.sim, client, userNumber)
         inviter.setParameters(
             inviteeDistribution=Deterministic(1),
             inviteeCountDistribution=Deterministic(1)
@@ -642,7 +644,7 @@
         otherNumber = 20
         values = [selfNumber - selfNumber, otherNumber - selfNumber]
 
-        inviter = RealisticInviter(Clock(), self.sim, client, selfNumber)
+        inviter = Inviter(Clock(), self.sim, client, selfNumber)
         inviter.setParameters(
             inviteeDistribution=SequentialDistribution(values),
             inviteeCountDistribution=Deterministic(1)
@@ -671,7 +673,7 @@
         anotherNumber = inviteeNumber + 5
         values = [inviteeNumber - selfNumber, inviteeNumber - selfNumber, anotherNumber - selfNumber]
 
-        inviter = RealisticInviter(Clock(), self.sim, client, selfNumber)
+        inviter = Inviter(Clock(), self.sim, client, selfNumber)
         inviter.setParameters(
             inviteeDistribution=SequentialDistribution(values),
             inviteeCountDistribution=Deterministic(2)
@@ -700,7 +702,7 @@
         userNumber = 1
         client = StubClient(userNumber, self.mktemp())
         client._calendars.update({calendar.url: calendar})
-        inviter = RealisticInviter(Clock(), self.sim, client, userNumber)
+        inviter = Inviter(Clock(), self.sim, client, userNumber)
         inviter.setParameters(
             inviteeDistribution=Deterministic(1),
             inviteeCountDistribution=Deterministic(2)
@@ -1089,3 +1091,22 @@
         self.assertEqual(
             ["Greater than 1% TESTING failed"],
             logger.failures())
+
+
+class AlarmAcknowledgerTests(TestCase):
+
+    def test_pastTheHour(self):
+        acknowledger = AlarmAcknowledger(None, None, None, {})
+        self.assertTrue(acknowledger._shouldUpdate(0))
+        self.assertFalse(acknowledger._shouldUpdate(0))
+        self.assertFalse(acknowledger._shouldUpdate(1))
+        self.assertFalse(acknowledger._shouldUpdate(1))
+        self.assertFalse(acknowledger._shouldUpdate(14))
+        self.assertTrue(acknowledger._shouldUpdate(15))
+        self.assertFalse(acknowledger._shouldUpdate(15))
+        self.assertFalse(acknowledger._shouldUpdate(16))
+        self.assertTrue(acknowledger._shouldUpdate(30))
+        self.assertFalse(acknowledger._shouldUpdate(30))
+        self.assertFalse(acknowledger._shouldUpdate(59))
+        self.assertTrue(acknowledger._shouldUpdate(0))
+        self.assertFalse(acknowledger._shouldUpdate(0))
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