Created some broken tests to highlight issue collective#333

src/icalendar/tests/test_timezoned_new.py

@@ -0,0 +1,387 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+"""
+Ref https://pytz-deprecation-shim.readthedocs.io/en/latest/migration.html and 
+other sources, the pytz library is on the way to becoming deprecated in favor
+of zoneinfo.  The good news is that zoneinfo is part of the standard "battery
+included" libraries.  The bad news is that it's not directly backwards
+compatible with pytz.
+"""
+
+import unittest
+
+import datetime
+import dateutil.parser
+import icalendar
+import os
+import pytz
+try:
+    import zoneinfo
+except:
+    try:
+        from backports import zoneinfo
+    except:
+        raise unittest.SkipTest("zoneinfo built-in library not supported in your python distribution")
+utc = zoneinfo.ZoneInfo('UTC')
+
+class TestNewTimezoned(unittest.TestCase):
+
+    def test_create_from_ical(self):
+        directory = os.path.dirname(__file__)
+        with open(os.path.join(directory, 'timezoned.ics'), 'rb') as fp:
+            data = fp.read()
+        cal = icalendar.Calendar.from_ical(data)
+
+        self.assertEqual(
+            cal['prodid'].to_ical(),
+            b"-//Plone.org//NONSGML plone.app.event//EN"
+        )
+
+        timezones = cal.walk('VTIMEZONE')
+        self.assertEqual(len(timezones), 1)
+
+        tz = timezones[0]
+        self.assertEqual(tz['tzid'].to_ical(), b"Europe/Vienna")
+
+        std = tz.walk('STANDARD')[0]
+        self.assertEqual(
+            std.decoded('TZOFFSETFROM'),
+            datetime.timedelta(0, 7200)
+        )
+
+        ev1 = cal.walk('VEVENT')[0]
+        self.assertEqual(
+            ev1.decoded('DTSTART'),
+            datetime.datetime(2012, 2, 13, 10, 0, 0, tzinfo=zoneinfo.ZoneInfo('Europe/Vienna'))
+        )
+        self.assertEqual(
+            ev1.decoded('DTSTAMP'),
+            datetime.datetime(2010, 10, 10, 9, 10, 10, tzinfo=utc)
+        )
+
+    def test_create_to_ical(self):
+        cal = icalendar.Calendar()
+
+        cal.add('prodid', "-//Plone.org//NONSGML plone.app.event//EN")
+        cal.add('version', "2.0")
+        cal.add('x-wr-calname', "test create calendar")
+        cal.add('x-wr-caldesc', "icalendar tests")
+        cal.add('x-wr-relcalid', "12345")
+        cal.add('x-wr-timezone', "Europe/Vienna")
+
+        tzc = icalendar.Timezone()
+        tzc.add('tzid', 'Europe/Vienna')
+        tzc.add('x-lic-location', 'Europe/Vienna')
+
+        tzs = icalendar.TimezoneStandard()
+        tzs.add('tzname', 'CET')
+        tzs.add('dtstart', datetime.datetime(1970, 10, 25, 3, 0, 0))
+        tzs.add('rrule', {'freq': 'yearly', 'bymonth': 10, 'byday': '-1su'})
+        tzs.add('TZOFFSETFROM', datetime.timedelta(hours=2))
+        tzs.add('TZOFFSETTO', datetime.timedelta(hours=1))
+
+        tzd = icalendar.TimezoneDaylight()
+        tzd.add('tzname', 'CEST')
+        tzd.add('dtstart', datetime.datetime(1970, 3, 29, 2, 0, 0))
+        tzs.add('rrule', {'freq': 'yearly', 'bymonth': 3, 'byday': '-1su'})
+        tzd.add('TZOFFSETFROM', datetime.timedelta(hours=1))
+        tzd.add('TZOFFSETTO', datetime.timedelta(hours=2))
+
+        tzc.add_component(tzs)
+        tzc.add_component(tzd)
+        cal.add_component(tzc)
+
+        event = icalendar.Event()
+        tz = zoneinfo.ZoneInfo("Europe/Vienna")
+        event.add(
+            'dtstart',
+            datetime.datetime(2012, 2, 13, 10, 00, 00, tzinfo=tz))
+        event.add(
+            'dtend',
+            datetime.datetime(2012, 2, 17, 18, 00, 00, tzinfo=tz))
+        event.add(
+            'dtstamp',
+            datetime.datetime(2010, 10, 10, 10, 10, 10, tzinfo=tz))
+        event.add(
+            'created',
+            datetime.datetime(2010, 10, 10, 10, 10, 10, tzinfo=tz))
+        event.add('uid', '123456')
+        event.add(
+            'last-modified',
+            datetime.datetime(2010, 10, 10, 10, 10, 10, tzinfo=tz))
+        event.add('summary', 'artsprint 2012')
+        # event.add('rrule', 'FREQ=YEARLY;INTERVAL=1;COUNT=10')
+        event.add('description', 'sprinting at the artsprint')
+        event.add('location', 'aka bild, wien')
+        event.add('categories', 'first subject')
+        event.add('categories', 'second subject')
+        event.add('attendee', 'häns')
+        event.add('attendee', 'franz')
+        event.add('attendee', 'sepp')
+        event.add('contact', 'Max Mustermann, 1010 Wien')
+        event.add('url', 'http://plone.org')
+        cal.add_component(event)
+
+        test_out = b'|'.join(cal.to_ical().splitlines())
+        test_out = test_out.decode('utf-8')
+
+        vtimezone_lines = "BEGIN:VTIMEZONE|TZID:Europe/Vienna|X-LIC-LOCATION:"
+        "Europe/Vienna|BEGIN:STANDARD|DTSTART;VALUE=DATE-TIME:19701025T03"
+        "0000|RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10|RRULE:FREQ=YEARLY;B"
+        "YDAY=-1SU;BYMONTH=3|TZNAME:CET|TZOFFSETFROM:+0200|TZOFFSETTO:+01"
+        "00|END:STANDARD|BEGIN:DAYLIGHT|DTSTART;VALUE=DATE-TIME:19700329T"
+        "020000|TZNAME:CEST|TZOFFSETFROM:+0100|TZOFFSETTO:+0200|END:DAYLI"
+        "GHT|END:VTIMEZONE"
+        self.assertTrue(vtimezone_lines in test_out)
+
+        test_str = "DTSTART;TZID=Europe/Vienna;VALUE=DATE-TIME:20120213T100000"
+        self.assertTrue(test_str in test_out)
+        self.assertTrue("ATTENDEE:sepp" in test_out)
+
+        # ical standard expects DTSTAMP and CREATED in UTC
+        self.assertTrue("DTSTAMP;VALUE=DATE-TIME:20101010T081010Z" in test_out)
+        self.assertTrue("CREATED;VALUE=DATE-TIME:20101010T081010Z" in test_out)
+
+    def test_tzinfo_dateutil(self):
+        # Test for issues #77, #63
+        # references: #73,7430b66862346fe3a6a100ab25e35a8711446717
+        date = dateutil.parser.parse('2012-08-30T22:41:00Z')
+        date2 = dateutil.parser.parse('2012-08-30T22:41:00 +02:00')
+        self.assertTrue(date.tzinfo.__module__.startswith('dateutil.tz'))
+        self.assertTrue(date2.tzinfo.__module__.startswith('dateutil.tz'))
+
+        # make sure, it's parsed properly and doesn't throw an error
+        self.assertTrue(icalendar.vDDDTypes(date).to_ical()
+                        == b'20120830T224100Z')
+        self.assertTrue(icalendar.vDDDTypes(date2).to_ical()
+                        == b'20120830T224100')
+
+
+class TestTimezoneCreation(unittest.TestCase):
+
+    def test_create_america_new_york(self):
+        """testing America/New_York, the most complex example from the
+        RFC"""
+
+        directory = os.path.dirname(__file__)
+        with open(os.path.join(directory, 'america_new_york.ics'), 'rb') as fp:
+            data = fp.read()
+        cal = icalendar.Calendar.from_ical(data)
+
+        tz = cal.walk('VEVENT')[0]['DTSTART'][0].dt.tzinfo
+        self.assertEqual(str(tz), 'custom_America/New_York')
+        pytz_new_york = pytz.timezone('America/New_York')
+
+        # for reasons (tm) the locally installed version of the time zone
+        # database isn't always complete, therefore we only compare some
+        # transition times
+        ny_transition_times = []
+        ny_transition_info = []
+        for num, date in enumerate(pytz_new_york._utc_transition_times):
+            if datetime.datetime(1967, 4, 30, 7, 0)\
+                    <= date <= datetime.datetime(2037, 11, 1, 6, 0):
+                ny_transition_times.append(date)
+                ny_transition_info.append(pytz_new_york._transition_info[num])
+        self.assertEqual(tz._utc_transition_times[:142], ny_transition_times)
+        self.assertEqual(tz._transition_info[0:142], ny_transition_info)
+        self.assertIn(
+            (
+                datetime.timedelta(-1, 72000),
+                datetime.timedelta(0, 3600), 'EDT'
+            ),
+            tz._tzinfos.keys()
+        )
+        self.assertIn(
+            (datetime.timedelta(-1, 68400), datetime.timedelta(0), 'EST'),
+            tz._tzinfos.keys()
+        )
+
+    def test_create_pacific_fiji(self):
+        """testing Pacific/Fiji, another pretty complex example with more than
+        one RDATE property per subcomponent"""
+        self.maxDiff = None
+
+        directory = os.path.dirname(__file__)
+        with open(os.path.join(directory, 'pacific_fiji.ics'), 'rb') as fp:
+            data = fp.read()
+        cal = icalendar.Calendar.from_ical(data)
+
+        tz = cal.walk('VEVENT')[0]['DTSTART'][0].dt.tzinfo
+        self.assertEqual(str(tz), 'custom_Pacific/Fiji')
+        self.assertEqual(tz._utc_transition_times,
+                         [datetime.datetime(1915, 10, 25, 12, 4),
+                          datetime.datetime(1998, 10, 31, 14, 0),
+                          datetime.datetime(1999, 2, 27, 14, 0),
+                          datetime.datetime(1999, 11, 6, 14, 0),
+                          datetime.datetime(2000, 2, 26, 14, 0),
+                          datetime.datetime(2009, 11, 28, 14, 0),
+                          datetime.datetime(2010, 3, 27, 14, 0),
+                          datetime.datetime(2010, 10, 23, 14, 0),
+                          datetime.datetime(2011, 3, 5, 14, 0),
+                          datetime.datetime(2011, 10, 22, 14, 0),
+                          datetime.datetime(2012, 1, 21, 14, 0),
+                          datetime.datetime(2012, 10, 20, 14, 0),
+                          datetime.datetime(2013, 1, 19, 14, 0),
+                          datetime.datetime(2013, 10, 26, 14, 0),
+                          datetime.datetime(2014, 1, 18, 13, 0),
+                          datetime.datetime(2014, 10, 25, 14, 0),
+                          datetime.datetime(2015, 1, 17, 13, 0),
+                          datetime.datetime(2015, 10, 24, 14, 0),
+                          datetime.datetime(2016, 1, 23, 13, 0),
+                          datetime.datetime(2016, 10, 22, 14, 0),
+                          datetime.datetime(2017, 1, 21, 13, 0),
+                          datetime.datetime(2017, 10, 21, 14, 0),
+                          datetime.datetime(2018, 1, 20, 13, 0),
+                          datetime.datetime(2018, 10, 20, 14, 0),
+                          datetime.datetime(2019, 1, 19, 13, 0),
+                          datetime.datetime(2019, 10, 26, 14, 0),
+                          datetime.datetime(2020, 1, 18, 13, 0),
+                          datetime.datetime(2020, 10, 24, 14, 0),
+                          datetime.datetime(2021, 1, 23, 13, 0),
+                          datetime.datetime(2021, 10, 23, 14, 0),
+                          datetime.datetime(2022, 1, 22, 13, 0),
+                          datetime.datetime(2022, 10, 22, 14, 0),
+                          datetime.datetime(2023, 1, 21, 13, 0),
+                          datetime.datetime(2023, 10, 21, 14, 0),
+                          datetime.datetime(2024, 1, 20, 13, 0),
+                          datetime.datetime(2024, 10, 26, 14, 0),
+                          datetime.datetime(2025, 1, 18, 13, 0),
+                          datetime.datetime(2025, 10, 25, 14, 0),
+                          datetime.datetime(2026, 1, 17, 13, 0),
+                          datetime.datetime(2026, 10, 24, 14, 0),
+                          datetime.datetime(2027, 1, 23, 13, 0),
+                          datetime.datetime(2027, 10, 23, 14, 0),
+                          datetime.datetime(2028, 1, 22, 13, 0),
+                          datetime.datetime(2028, 10, 21, 14, 0),
+                          datetime.datetime(2029, 1, 20, 13, 0),
+                          datetime.datetime(2029, 10, 20, 14, 0),
+                          datetime.datetime(2030, 1, 19, 13, 0),
+                          datetime.datetime(2030, 10, 26, 14, 0),
+                          datetime.datetime(2031, 1, 18, 13, 0),
+                          datetime.datetime(2031, 10, 25, 14, 0),
+                          datetime.datetime(2032, 1, 17, 13, 0),
+                          datetime.datetime(2032, 10, 23, 14, 0),
+                          datetime.datetime(2033, 1, 22, 13, 0),
+                          datetime.datetime(2033, 10, 22, 14, 0),
+                          datetime.datetime(2034, 1, 21, 13, 0),
+                          datetime.datetime(2034, 10, 21, 14, 0),
+                          datetime.datetime(2035, 1, 20, 13, 0),
+                          datetime.datetime(2035, 10, 20, 14, 0),
+                          datetime.datetime(2036, 1, 19, 13, 0),
+                          datetime.datetime(2036, 10, 25, 14, 0),
+                          datetime.datetime(2037, 1, 17, 13, 0),
+                          datetime.datetime(2037, 10, 24, 14, 0),
+                          datetime.datetime(2038, 1, 23, 13, 0),
+                          datetime.datetime(2038, 10, 23, 14, 0)]
+
+                         )
+        self.assertEqual(
+            tz._transition_info,
+            [(
+                datetime.timedelta(0, 43200),
+                datetime.timedelta(0),
+                'custom_Pacific/Fiji_19151026T000000_+115544_+1200'
+            )] +
+            3 * [(
+                datetime.timedelta(0, 46800),
+                datetime.timedelta(0, 3600),
+                'custom_Pacific/Fiji_19981101T020000_+1200_+1300'
+            ), (
+                datetime.timedelta(0, 43200),
+                datetime.timedelta(0),
+                'custom_Pacific/Fiji_19990228T030000_+1300_+1200')
+            ] +
+            3 * [(
+                datetime.timedelta(0, 46800),
+                datetime.timedelta(0, 3600),
+                'custom_Pacific/Fiji_20101024T020000_+1200_+1300'
+            ), (
+                datetime.timedelta(0, 43200),
+                datetime.timedelta(0),
+                'custom_Pacific/Fiji_19990228T030000_+1300_+1200'
+            )] +
+            25 * [(
+                datetime.timedelta(0, 46800),
+                datetime.timedelta(0, 3600),
+                'custom_Pacific/Fiji_20101024T020000_+1200_+1300'
+            ), (
+                datetime.timedelta(0, 43200),
+                datetime.timedelta(0),
+                'custom_Pacific/Fiji_20140119T020000_+1300_+1200'
+            )] +
+            [(
+                datetime.timedelta(0, 46800),
+                datetime.timedelta(0, 3600),
+                'custom_Pacific/Fiji_20101024T020000_+1200_+1300'
+            )]
+        )
+
+        self.assertIn(
+            (
+                datetime.timedelta(0, 46800),
+                datetime.timedelta(0, 3600),
+                'custom_Pacific/Fiji_19981101T020000_+1200_+1300'
+            ),
+            tz._tzinfos.keys()
+        )
+        self.assertIn(
+            (
+                datetime.timedelta(0, 43200),
+                datetime.timedelta(0),
+                'custom_Pacific/Fiji_19990228T030000_+1300_+1200'
+            ),
+            tz._tzinfos.keys()
+        )
+
+    def test_same_start_date(self):
+        """testing if we can handle VTIMEZONEs whose different components
+        have the same start DTIMEs."""
+        directory = os.path.dirname(__file__)
+        with open(os.path.join(directory, 'timezone_same_start.ics'), 'rb') as fp:
+            data = fp.read()
+        cal = icalendar.Calendar.from_ical(data)
+        d = cal.subcomponents[1]['DTSTART'].dt
+        self.assertEqual(d.strftime('%c'), 'Fri Feb 24 12:00:00 2017')
+
+    def test_same_start_date_and_offset(self):
+        """testing if we can handle VTIMEZONEs whose different components
+        have the same DTSTARTs, TZOFFSETFROM, and TZOFFSETTO."""
+        directory = os.path.dirname(__file__)
+        with open(os.path.join(directory, 'timezone_same_start_and_offset.ics'), 'rb') as fp:
+            data = fp.read()
+        cal = icalendar.Calendar.from_ical(data)
+        d = cal.subcomponents[1]['DTSTART'].dt
+        self.assertEqual(d.strftime('%c'), 'Fri Feb 24 12:00:00 2017')
+
+    def test_rdate(self):
+        """testing if we can handle VTIMEZONEs who only have an RDATE, not RRULE
+        """
+        directory = os.path.dirname(__file__)
+        with open(os.path.join(directory, 'timezone_rdate.ics'), 'rb') as fp:
+            data = fp.read()
+        cal = icalendar.Calendar.from_ical(data)
+        vevent = cal.walk('VEVENT')[0]
+        tz = vevent['DTSTART'].dt.tzinfo
+        self.assertEqual(str(tz), 'posix/Europe/Vaduz')
+        self.assertEqual(
+            tz._utc_transition_times[:6],
+            [
+                datetime.datetime(1901, 12, 13, 20, 45, 38),
+                datetime.datetime(1941, 5, 5, 0, 0, 0),
+                datetime.datetime(1941, 10, 6, 0, 0, 0),
+                datetime.datetime(1942, 5, 4, 0, 0, 0),
+                datetime.datetime(1942, 10, 5, 0, 0, 0),
+                datetime.datetime(1981, 3, 29, 1, 0),
+            ])
+        self.assertEqual(
+            tz._transition_info[:6],
+            [
+                (datetime.timedelta(0, 3600), datetime.timedelta(0), 'CET'),
+                (datetime.timedelta(0, 7200), datetime.timedelta(0, 3600), 'CEST'),
+                (datetime.timedelta(0, 3600), datetime.timedelta(0), 'CET'),
+                (datetime.timedelta(0, 7200), datetime.timedelta(0, 3600), 'CEST'),
+                (datetime.timedelta(0, 3600), datetime.timedelta(0), 'CET'),
+                (datetime.timedelta(0, 7200), datetime.timedelta(0, 3600), 'CEST'),
+            ]
+        )