fix #526

CHANGES.rst

@@ -6,7 +6,10 @@ Changelog
 
 Minor changes:
 
-- ...
+- Calendar components are now properly compared
+  Ref: #550
+  Fixes: #526
+  [jacadzaca]
 
 Breaking changes:
 

src/icalendar/cal.py

@@ -436,6 +436,22 @@ def __repr__(self):
         subs = ', '.join(str(it) for it in self.subcomponents)
         return f"{self.name or type(self).__name__}({dict(self)}{', ' + subs if subs else ''})"
 
+    def __eq__(self, other):
+        properties_equal = super().__eq__(other)
+        if not properties_equal:
+            return False
+
+        # The subcomponents might not be in the same order,
+        # neither there's a natural key we can sort the subcomponents by nor
+        # are the subcomponent types hashable, so  we cant put them in a set to
+        # check for set equivalence. We have to iterate over the subcomponents
+        # and look for each of them in the list.
+        for subcomponent in self.subcomponents:
+            if subcomponent not in other.subcomponents:
+                return False
+
+        return True
+
 
 #######################################
 # components defined in RFC 5545

src/icalendar/tests/calendars/issue_526_calendar_with_different_events.ics

@@ -0,0 +1,18 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:icalendar-2023
+BEGIN:VEVENT
+UID:ical-jacadzaca-3
+SUMMARY: Some very different event ':'
+DTSTART;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T160000
+DTEND;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T163000
+DTSTAMP:20211004T150245Z
+END:VEVENT
+BEGIN:VEVENT
+UID:ical-jacadzaca-4
+SUMMARY: Some very different other event
+DTSTART;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T164000
+DTEND;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T165000
+DTSTAMP:20211004T150245Z
+END:VEVENT
+END:VCALENDAR

src/icalendar/tests/calendars/issue_526_calendar_with_events.ics

@@ -0,0 +1,18 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:icalendar-2023
+BEGIN:VEVENT
+UID:1
+SUMMARY: Some event ':'
+DTSTART;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T160000
+DTEND;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T163000
+DTSTAMP:20211004T150245Z
+END:VEVENT
+BEGIN:VEVENT
+UID:2
+SUMMARY: Some other event
+DTSTART;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T164000
+DTEND;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T165000
+DTSTAMP:20211004T150245Z
+END:VEVENT
+END:VCALENDAR

src/icalendar/tests/calendars/issue_526_calendar_with_shuffeled_events.ics

@@ -0,0 +1,18 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:icalendar-2023
+BEGIN:VEVENT
+UID:2
+SUMMARY: Some other event
+DTSTART;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T164000
+DTEND;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T165000
+DTSTAMP:20211004T150245Z
+END:VEVENT
+BEGIN:VEVENT
+UID:1
+SUMMARY: Some event ':'
+DTSTART;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T160000
+DTEND;TZID="Western/Central Europe";VALUE=DATE-TIME:20211101T163000
+DTSTAMP:20211004T150245Z
+END:VEVENT
+END:VCALENDAR

src/icalendar/tests/test_unit_cal.py

@@ -2,6 +2,8 @@
 from datetime import timedelta
 import unittest
 
+import pytest
+
 import icalendar
 import pytz
 import re
@@ -455,3 +457,37 @@ def test_cal_strict_parsing(self):
         icalendar.vUTCOffset.ignore_exceptions = True
         self.assertEqual(icalendar.Calendar.from_ical(cal_str).to_ical(), cal_str)
         icalendar.vUTCOffset.ignore_exceptions = False
+
+
+@pytest.mark.parametrize('calendar', [
+    'issue_156_RDATE_with_PERIOD_TZID_khal',
+    'issue_156_RDATE_with_PERIOD_TZID_khal_2',
+    'issue_178_custom_component_contains_other',
+    'issue_178_custom_component_inside_other',
+    'issue_526_calendar_with_events',
+    'issue_526_calendar_with_different_events',
+])
+@pytest.mark.parametrize('other_calendar', [
+    'issue_156_RDATE_with_PERIOD_TZID_khal',
+    'issue_156_RDATE_with_PERIOD_TZID_khal_2',
+    'issue_178_custom_component_contains_other',
+    'issue_178_custom_component_inside_other',
+    'issue_526_calendar_with_events',
+    'issue_526_calendar_with_different_events',
+])
+def test_comparing_calendars(calendars, calendar, other_calendar):
+    are_calendars_equal = calendars[calendar] == calendars[other_calendar]
+    are_calendars_actually_equal = calendar == other_calendar
+    assert are_calendars_equal == are_calendars_actually_equal
+
+
+@pytest.mark.parametrize('calendar, shuffeled_calendar', [
+    (
+        'issue_526_calendar_with_events',
+        'issue_526_calendar_with_shuffeled_events',
+    ),
+])
+def test_calendars_with_same_subcomponents_in_different_order_are_equal(calendars, calendar, shuffeled_calendar):
+    assert not calendars[calendar].subcomponents == calendars[shuffeled_calendar].subcomponents
+    assert calendars[calendar] == calendars[shuffeled_calendar]
+