[CalendarServer-changes] [3340] CalendarServer/branches/users/cdaboo/implicit-if-match-3306/ twistedcaldav/scheduling

source_changes at macosforge.org source_changes at macosforge.org
Fri Nov 7 08:49:06 PST 2008 

Revision: 3340
          http://trac.macosforge.org/projects/calendarserver/changeset/3340
Author:   cdaboo at apple.com
Date:     2008-11-07 08:49:05 -0800 (Fri, 07 Nov 2008)
Log Message:
-----------
Tests and minor fix for implicit data smart merge behavior.

Modified Paths:
--------------
    CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/icaldiff.py
    CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/implicit.py
    CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/test/test_icaldiff.py

Modified: CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/icaldiff.py
===================================================================
--- CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/icaldiff.py	2008-11-07 01:15:32 UTC (rev 3339)
+++ CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/icaldiff.py	2008-11-07 16:49:05 UTC (rev 3340)
@@ -162,7 +162,7 @@
             relevant, C{False} otherwise
         """
 
-        props_to_test = ("DTSTART", "DTEND", "DURATION", "RRULE", "RDATE", "EXDATE",)
+        props_to_test = ("DTSTART", "DTEND", "DURATION", "RRULE", "RDATE", "EXDATE", "RECURRENCE-ID",)
         
         for prop in props_to_test:
             # Change => no merge

Modified: CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/implicit.py
===================================================================
--- CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/implicit.py	2008-11-07 01:15:32 UTC (rev 3339)
+++ CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/implicit.py	2008-11-07 16:49:05 UTC (rev 3340)
@@ -183,7 +183,7 @@
         returnValue(self.state is not None)
 
     @inlineCallbacks
-    def doImplicitScheduling(self, do_smart_merge):
+    def doImplicitScheduling(self, do_smart_merge=False):
         """
         Do implicit scheduling operation based on the data already set by call to checkImplicitScheduling.
 

Modified: CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/test/test_icaldiff.py
===================================================================
--- CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/test/test_icaldiff.py	2008-11-07 01:15:32 UTC (rev 3339)
+++ CalendarServer/branches/users/cdaboo/implicit-if-match-3306/twistedcaldav/scheduling/test/test_icaldiff.py	2008-11-07 16:49:05 UTC (rev 3340)
@@ -2172,9 +2172,708 @@
 END:VCALENDAR
 """,
             ),
+            (
+                "#1.3 Simple component, server change only",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#1.4 Simple component, both change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#1.5 Simple component, incompatible change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T130000Z
+DTEND:20080601T140000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T130000Z
+DTEND:20080601T140000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
         )
         
-        for description, calendar1, calendar2, changed_calendar in itertools.chain(data1,):
+        data2 = (
+            (
+                "#2.1 Simple recurring component, no change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.2 Simple recurring component, client instance change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test - 3
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test - 3
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.3 Simple recurring component, server instance change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.4 Simple recurring component, both instance change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080604T120000Z
+DTSTART:20080604T120000Z
+DTEND:20080604T130000Z
+SUMMARY:Test - 4
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080604T120000Z
+DTSTART:20080604T120000Z
+DTEND:20080604T130000Z
+SUMMARY:Test - 4
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.5 Simple recurring component, both instance incompatible change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080604T120000Z
+DTSTART:20080604T130000Z
+DTEND:20080604T140000Z
+SUMMARY:Test - 4
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080604T120000Z
+DTSTART:20080604T130000Z
+DTEND:20080604T140000Z
+SUMMARY:Test - 4
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+        )
+        
+        for description, calendar1, calendar2, changed_calendar in itertools.chain(data1, data2,):
             cal1 = Component.fromString(calendar1)
             cal2 = Component.fromString(calendar2)
 
@@ -2184,3 +2883,638 @@
             strcal2 = str(cal2)
             strchanged = str(Component.fromString(changed_calendar))
             self.assertEqual(strchanged, strcal2, msg="%s mismatch:\n%s" % (description, "\n".join(unified_diff(strchanged.split("\n"), strcal2.split("\n")))))
+
+    def test_attendee_smart_merge(self):
+        
+        data1 = (
+            (
+                "#1.1 Simple component, no change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#1.2 Simple component, client change only",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#1.3 Simple component, server change only",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#1.4 Simple component, both change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+        )
+        
+        data2 = (
+            (
+                "#2.1 Simple recurring component, no change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.2 Simple recurring component, client instance change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.3 Simple recurring component, server instance change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+            (
+                "#2.4 Simple recurring component, both instance change",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080604T120000Z
+DTSTART:20080604T120000Z
+DTEND:20080604T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+                """BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
+BEGIN:VEVENT
+UID:12345-67890
+DTSTART:20080601T120000Z
+DTEND:20080601T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+RRULE:FREQ=DAILY
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080602T120000Z
+DTSTART:20080602T120000Z
+DTEND:20080602T130000Z
+SUMMARY:Test - 2
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080604T120000Z
+DTSTART:20080604T120000Z
+DTEND:20080604T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user3 at example.com
+END:VEVENT
+BEGIN:VEVENT
+UID:12345-67890
+RECURRENCE-ID:20080603T120000Z
+DTSTART:20080603T120000Z
+DTEND:20080603T130000Z
+SUMMARY:Test
+ORGANIZER;CN="User 01":mailto:user1 at example.com
+ATTENDEE:mailto:user1 at example.com
+ATTENDEE;PARTSTAT=ACCEPTED:mailto:user2 at example.com
+ATTENDEE;PARTSTAT=DECLINED:mailto:user3 at example.com
+END:VEVENT
+END:VCALENDAR
+""",
+            ),
+        )
+        
+        for description, calendar1, calendar2, changed_calendar in itertools.chain(data1, data2,):
+            cal1 = Component.fromString(calendar1)
+            cal2 = Component.fromString(calendar2)
+
+            differ = iCalDiff(cal1, cal2, True)
+            differ.attendeeDiff("mailto:user2 at example.com")
+
+            strcal2 = str(cal2)
+            strchanged = str(Component.fromString(changed_calendar))
+            self.assertEqual(strchanged, strcal2, msg="%s mismatch:\n%s" % (description, "\n".join(unified_diff(strchanged.split("\n"), strcal2.split("\n")))))
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