# -*- coding: utf-8 -*-

from __future__ import print_function

import datetime
import dateutil
import re
import sys
import unittest
import json

from dateutil.tz import tzutc
from dateutil.rrule import rrule, rruleset, WEEKLY, MONTHLY

from vobject import base, iCalendar
from vobject import icalendar

from vobject.base import __behaviorRegistry as behavior_registry
from vobject.base import ContentLine, parseLine, ParseError
from vobject.base import readComponents, textLineToContentLine

from vobject.change_tz import change_tz

from vobject.icalendar import MultiDateBehavior, PeriodBehavior, \
    RecurringComponent, utc
from vobject.icalendar import parseDtstart, stringToTextValues, \
    stringToPeriod, timedeltaToString

two_hours = datetime.timedelta(hours=2)


def get_test_file(path):
    """
    Helper function to open and read test files.
    """
    filepath = "test_files/{}".format(path)
    if sys.version_info[0] < 3:
        # On python 2, this library operates on bytes.
        f = open(filepath, 'r')
    else:
        # On python 3, it operates on unicode. We need to specify an encoding
        # for systems for which the preferred encoding isn't utf-8 (e.g windows)
        f = open(filepath, 'r', encoding='utf-8')
    text = f.read()
    f.close()
    return text


class TestCalendarSerializing(unittest.TestCase):
    """
    Test creating an iCalendar file
    """
    max_diff = None

    def test_scratchbuild(self):
        """
        CreateCalendar 2.0 format from scratch
        """
        test_cal = get_test_file("simple_2_0_test.ics")
        cal = base.newFromBehavior('vcalendar', '2.0')
        cal.add('vevent')
        cal.vevent.add('dtstart').value = datetime.datetime(2006, 5, 9)
        cal.vevent.add('description').value = "Test event"
        cal.vevent.add('created').value = \
            datetime.datetime(2006, 1, 1, 10,
                              tzinfo=dateutil.tz.tzical(
                                  "test_files/timezones.ics").get('US/Pacific'))
        cal.vevent.add('uid').value = "Not very random UID"

        # Note we're normalizing line endings, because no one got time for that.
        self.assertEqual(
            cal.serialize().replace('\r\n', '\n'),
            test_cal.replace('\r\n', '\n')
        )

    def test_unicode(self):
        """
        Test unicode characters
        """
        test_cal = get_test_file("utf8_test.ics")
        vevent = base.readOne(test_cal).vevent
        vevent2 = base.readOne(vevent.serialize())
        self.assertEqual(str(vevent), str(vevent2))

        self.assertEqual(
            vevent.summary.value,
            'The title こんにちはキティ'
        )

        if sys.version_info[0] < 3:
            test_cal = test_cal.decode('utf-8')
            vevent = base.readOne(test_cal).vevent
            vevent2 = base.readOne(vevent.serialize())
            self.assertEqual(str(vevent), str(vevent2))
            self.assertEqual(
                vevent.summary.value,
                'The title こんにちはキティ'
            )

    def test_wrapping(self):
        """
        Should support input file with a long text field covering multiple lines
        """
        test_journal = get_test_file("journal.ics")
        vobj = base.readOne(test_journal)
        vjournal = base.readOne(vobj.serialize())
        self.assertTrue('Joe, Lisa, and Bob' in vjournal.description.value)
        self.assertTrue('Tuesday.\n2.' in vjournal.description.value)

    def test_multiline(self):
        """
        Multi-text serialization test
        """
        category = base.newFromBehavior('categories')
        category.value = ['Random category']
        self.assertEqual(
            category.serialize().strip(),
            "CATEGORIES:Random category"
        )

        category.value.append('Other category')
        self.assertEqual(
            category.serialize().strip(),
            "CATEGORIES:Random category,Other category"
        )

    def test_semicolon_separated(self):
        """
        Semi-colon separated multi-text serialization test
        """
        request_status = base.newFromBehavior('request-status')
        request_status.value = ['5.1', 'Service unavailable']
        self.assertEqual(
            request_status.serialize().strip(),
            "REQUEST-STATUS:5.1;Service unavailable"
        )

    @staticmethod
    def test_unicode_multiline():
        """
        Test multiline unicode characters
        """
        cal = iCalendar()
        cal.add('method').value = 'REQUEST'
        cal.add('vevent')
        cal.vevent.add('created').value = datetime.datetime.now()
        cal.vevent.add('summary').value = 'Классное событие'
        cal.vevent.add('description').value = ('Классное событие Классное событие Классное событие Классное событие '
                                               'Классное событие Классsdssdное событие')

        # json tries to encode as utf-8 and it would break if some chars could not be encoded
        json.dumps(cal.serialize())

    @staticmethod
    def test_ical_to_hcal():
        """
        Serializing iCalendar to hCalendar.

        Since Hcalendar is experimental and the behavior doesn't seem to want to load,
        This test will have to wait.


        tzs = dateutil.tz.tzical("test_files/timezones.ics")
        cal = base.newFromBehavior('hcalendar')
        self.assertEqual(
            str(cal.behavior),
            "<class 'vobject.hcalendar.HCalendar'>"
        )
        cal.add('vevent')
        cal.vevent.add('summary').value = "this is a note"
        cal.vevent.add('url').value = "http://microformats.org/code/hcalendar/creator"
        cal.vevent.add('dtstart').value = datetime.date(2006,2,27)
        cal.vevent.add('location').value = "a place"
        cal.vevent.add('dtend').value = datetime.date(2006,2,27) + datetime.timedelta(days = 2)

        event2 = cal.add('vevent')
        event2.add('summary').value = "Another one"
        event2.add('description').value = "The greatest thing ever!"
        event2.add('dtstart').value = datetime.datetime(1998, 12, 17, 16, 42, tzinfo = tzs.get('US/Pacific'))
        event2.add('location').value = "somewhere else"
        event2.add('dtend').value = event2.dtstart.value + datetime.timedelta(days = 6)
        hcal = cal.serialize()
        """
        #self.assertEqual(
        #    str(hcal),
        #    """<span class="vevent">
        #           <a class="url" href="http://microformats.org/code/hcalendar/creator">
        #             <span class="summary">this is a note</span>:
        #              <abbr class="dtstart", title="20060227">Monday, February 27</abbr>
        #              - <abbr class="dtend", title="20060301">Tuesday, February 28</abbr>
        #              at <span class="location">a place</span>
        #           </a>
        #        </span>
        #        <span class="vevent">
        #           <span class="summary">Another one</span>:
        #           <abbr class="dtstart", title="19981217T164200-0800">Thursday, December 17, 16:42</abbr>
        #           - <abbr class="dtend", title="19981223T164200-0800">Wednesday, December 23, 16:42</abbr>
        #           at <span class="location">somewhere else</span>
        #           <div class="description">The greatest thing ever!</div>
        #        </span>
        #    """
        #)


class TestBehaviors(unittest.TestCase):
    """
    Test Behaviors
    """
    def test_general_behavior(self):
        """
        Tests for behavior registry, getting and creating a behavior.
        """
        # Check expected behavior registry.
        self.assertEqual(
            sorted(behavior_registry.keys()),
            ['', 'ACTION', 'ADR', 'AVAILABLE', 'BUSYTYPE', 'CALSCALE',
             'CATEGORIES', 'CLASS', 'COMMENT', 'COMPLETED', 'CONTACT',
             'CREATED', 'DAYLIGHT', 'DESCRIPTION', 'DTEND', 'DTSTAMP',
             'DTSTART', 'DUE', 'DURATION', 'EXDATE', 'EXRULE', 'FN', 'FREEBUSY',
             'LABEL', 'LAST-MODIFIED', 'LOCATION', 'METHOD', 'N', 'ORG',
             'PHOTO', 'PRODID', 'RDATE', 'RECURRENCE-ID', 'RELATED-TO',
             'REQUEST-STATUS', 'RESOURCES', 'RRULE', 'STANDARD', 'STATUS',
             'SUMMARY', 'TRANSP', 'TRIGGER', 'UID', 'VALARM', 'VAVAILABILITY',
             'VCALENDAR', 'VCARD', 'VEVENT', 'VFREEBUSY', 'VJOURNAL',
             'VTIMEZONE', 'VTODO']
        )

        # test get_behavior
        behavior = base.getBehavior('VCALENDAR')
        self.assertEqual(
            str(behavior),
            "<class 'vobject.icalendar.VCalendar2_0'>"
        )
        self.assertTrue(behavior.isComponent)

        self.assertEqual(
            base.getBehavior("invalid_name"),
            None
        )
        # test for ContentLine (not a component)
        non_component_behavior = base.getBehavior('RDATE')
        self.assertFalse(non_component_behavior.isComponent)

    def test_MultiDateBehavior(self):
        """
        Test MultiDateBehavior
        """
        parseRDate = MultiDateBehavior.transformToNative
        self.assertEqual(
            str(parseRDate(textLineToContentLine("RDATE;VALUE=DATE:19970304,19970504,19970704,19970904"))),
            "<RDATE{'VALUE': ['DATE']}[datetime.date(1997, 3, 4), datetime.date(1997, 5, 4), datetime.date(1997, 7, 4), datetime.date(1997, 9, 4)]>"
        )
        self.assertEqual(
            str(parseRDate(textLineToContentLine("RDATE;VALUE=PERIOD:19960403T020000Z/19960403T040000Z,19960404T010000Z/PT3H"))),
            "<RDATE{'VALUE': ['PERIOD']}[(datetime.datetime(1996, 4, 3, 2, 0, tzinfo=tzutc()), datetime.datetime(1996, 4, 3, 4, 0, tzinfo=tzutc())), (datetime.datetime(1996, 4, 4, 1, 0, tzinfo=tzutc()), datetime.timedelta(0, 10800))]>"
        )

    def test_periodBehavior(self):
        """
        Test PeriodBehavior
        """
        line = ContentLine('test', [], '', isNative=True)
        line.behavior = PeriodBehavior
        line.value = [(datetime.datetime(2006, 2, 16, 10), two_hours)]

        self.assertEqual(
            line.transformFromNative().value,
            '20060216T100000/PT2H'
        )
        self.assertEqual(
            line.transformToNative().value,
            [(datetime.datetime(2006, 2, 16, 10, 0),
              datetime.timedelta(0, 7200))]
        )

        line.value.append((datetime.datetime(2006, 5, 16, 10), two_hours))

        self.assertEqual(
            line.serialize().strip(),
            'TEST:20060216T100000/PT2H,20060516T100000/PT2H'
        )


class TestVTodo(unittest.TestCase):
    """
    VTodo Tests
    """
    def test_vtodo(self):
        """
        Test VTodo
        """
        vtodo = get_test_file("vtodo.ics")
        obj = base.readOne(vtodo)
        obj.vtodo.add('completed')
        obj.vtodo.completed.value = datetime.datetime(2015,5,5,13,30)
        self.assertEqual(obj.vtodo.completed.serialize()[0:23],
                         'COMPLETED:20150505T1330')
        obj = base.readOne(obj.serialize())
        self.assertEqual(obj.vtodo.completed.value,
                         datetime.datetime(2015,5,5,13,30))


class TestVobject(unittest.TestCase):
    """
    VObject Tests
    """
    max_diff = None

    @classmethod
    def setUpClass(cls):
        """
        Method for setting up class fixture before running tests in the class.
        Fetches test file.
        """
        cls.simple_test_cal = get_test_file("simple_test.ics")

    def test_readComponents(self):
        """
        Test if reading components correctly
        """
        cal = next(readComponents(self.simple_test_cal))

        self.assertEqual(str(cal), "<VCALENDAR| [<VEVENT| [<SUMMARY{'BLAH': ['hi!']}Bastille Day Party>]>]>")
        self.assertEqual(str(cal.vevent.summary), "<SUMMARY{'BLAH': ['hi!']}Bastille Day Party>")

    def test_parseLine(self):
        """
        Test line parsing
        """
        self.assertEqual(parseLine("BLAH:"), ('BLAH', [], '', None))
        self.assertEqual(
            parseLine("RDATE:VALUE=DATE:19970304,19970504,19970704,19970904"),
            ('RDATE', [], 'VALUE=DATE:19970304,19970504,19970704,19970904', None)
        )
        self.assertEqual(
            parseLine('DESCRIPTION;ALTREP="http://www.wiz.org":The Fall 98 Wild Wizards Conference - - Las Vegas, NV, USA'),
            ('DESCRIPTION', [['ALTREP', 'http://www.wiz.org']], 'The Fall 98 Wild Wizards Conference - - Las Vegas, NV, USA', None)
        )
        self.assertEqual(
            parseLine("EMAIL;PREF;INTERNET:john@nowhere.com"),
            ('EMAIL', [['PREF'], ['INTERNET']], 'john@nowhere.com', None)
        )
        self.assertEqual(
            parseLine('EMAIL;TYPE="blah",hah;INTERNET="DIGI",DERIDOO:john@nowhere.com'),
            ('EMAIL', [['TYPE', 'blah', 'hah'], ['INTERNET', 'DIGI', 'DERIDOO']], 'john@nowhere.com', None)
        )
        self.assertEqual(
            parseLine('item1.ADR;type=HOME;type=pref:;;Reeperbahn 116;Hamburg;;20359;'),
            ('ADR', [['type', 'HOME'], ['type', 'pref']], ';;Reeperbahn 116;Hamburg;;20359;', 'item1')
        )
        self.assertRaises(ParseError, parseLine, ":")


class TestGeneralFileParsing(unittest.TestCase):
    """
    General tests for parsing ics files.
    """
    def test_readOne(self):
        """
        Test reading first component of ics
        """
        cal = get_test_file("silly_test.ics")
        silly = base.readOne(cal)
        self.assertEqual(
            str(silly),
            "<SILLYPROFILE| [<MORESTUFF{}this line is not folded, but in practice probably ought to be, as it is exceptionally long, and moreover demonstratively stupid>, <SILLYNAME{}name>, <STUFF{}foldedline>]>"
        )
        self.assertEqual(
            str(silly.stuff),
            "<STUFF{}foldedline>"
        )

    def test_importing(self):
        """
        Test importing ics
        """
        cal = get_test_file("standard_test.ics")
        c = base.readOne(cal, validate=True)
        self.assertEqual(
            str(c.vevent.valarm.trigger),
            "<TRIGGER{}-1 day, 0:00:00>"
        )

        self.assertEqual(
            str(c.vevent.dtstart.value),
            "2002-10-28 14:00:00-08:00"
        )
        self.assertTrue(
            isinstance(c.vevent.dtstart.value, datetime.datetime)
        )
        self.assertEqual(
            str(c.vevent.dtend.value),
            "2002-10-28 15:00:00-08:00"
        )
        self.assertTrue(
            isinstance(c.vevent.dtend.value, datetime.datetime)
        )
        self.assertEqual(
            c.vevent.dtstamp.value,
            datetime.datetime(2002, 10, 28, 1, 17, 6, tzinfo=tzutc())
        )

        vevent = c.vevent.transformFromNative()
        self.assertEqual(
            str(vevent.rrule),
            "<RRULE{}FREQ=Weekly;COUNT=10>"
        )

    def test_bad_stream(self):
        """
        Test bad ics stream
        """
        cal = get_test_file("badstream.ics")
        self.assertRaises(ParseError, base.readOne, cal)

    def test_bad_line(self):
        """
        Test bad line in ics file
        """
        cal = get_test_file("badline.ics")
        self.assertRaises(ParseError, base.readOne, cal)

        newcal = base.readOne(cal, ignoreUnreadable=True)
        self.assertEqual(
            str(newcal.vevent.x_bad_underscore),
            '<X-BAD-UNDERSCORE{}TRUE>'
        )

    def test_parseParams(self):
        """
        Test parsing parameters
        """
        self.assertEqual(
            base.parseParams(';ALTREP="http://www.wiz.org"'),
            [['ALTREP', 'http://www.wiz.org']]
        )
        self.assertEqual(
            base.parseParams(';ALTREP="http://www.wiz.org;;",Blah,Foo;NEXT=Nope;BAR'),
            [['ALTREP', 'http://www.wiz.org;;', 'Blah', 'Foo'],
             ['NEXT', 'Nope'], ['BAR']]
        )


class TestVcards(unittest.TestCase):
    """
    Test VCards
    """
    @classmethod
    def setUpClass(cls):
        """
        Method for setting up class fixture before running tests in the class.
        Fetches test file.
        """
        cls.test_file = get_test_file("vcard_with_groups.ics")
        cls.card = base.readOne(cls.test_file)

    def test_vcard_creation(self):
        """
        Test creating a vCard
        """
        vcard = base.newFromBehavior('vcard', '3.0')
        self.assertEqual(
            str(vcard),
            "<VCARD| []>"
        )

    def test_default_behavior(self):
        """
        Default behavior test.
        """
        card = self.card
        self.assertEqual(
            base.getBehavior('note'),
            None
        )
        self.assertEqual(
            str(card.note.value),
            "The Mayor of the great city of Goerlitz in the great country of Germany.\nNext line."
        )

    def test_with_groups(self):
        """
        vCard groups test
        """
        card = self.card
        self.assertEqual(
            str(card.group),
            'home'
        )
        self.assertEqual(
            str(card.tel.group),
            'home'
        )

        card.group = card.tel.group = 'new'
        self.assertEqual(
            str(card.tel.serialize().strip()),
            'new.TEL;TYPE=fax,voice,msg:+49 3581 123456'
        )
        self.assertEqual(
            str(card.serialize().splitlines()[0]),
            'new.BEGIN:VCARD'
        )


    def test_vcard_3_parsing(self):
        """
        VCARD 3.0 parse test
        """
        test_file = get_test_file("simple_3_0_test.ics")
        card = base.readOne(test_file)
        # value not rendering correctly?
        #self.assertEqual(
        #    card.adr.value,
        #    "<Address: Haight Street 512;\nEscape, Test\nNovosibirsk,  80214\nGnuland>"
        #)
        self.assertEqual(
            card.org.value,
            ["University of Novosibirsk", "Department of Octopus Parthenogenesis"]
        )

        for _ in range(3):
            new_card = base.readOne(card.serialize())
            self.assertEqual(new_card.org.value, card.org.value)
            card = new_card


class TestIcalendar(unittest.TestCase):
    """
    Tests for icalendar.py
    """
    max_diff = None
    def test_parseDTStart(self):
        """
        Should take a content line and return a datetime object.
        """
        self.assertEqual(
            parseDtstart(textLineToContentLine("DTSTART:20060509T000000")),
            datetime.datetime(2006, 5, 9, 0, 0)
        )

    def test_regexes(self):
        """
        Test regex patterns
        """
        self.assertEqual(
            re.findall(base.patterns['name'], '12foo-bar:yay'),
            ['12foo-bar', 'yay']
        )
        self.assertEqual(
            re.findall(base.patterns['safe_char'], 'a;b"*,cd'),
            ['a', 'b', '*', 'c', 'd']
        )
        self.assertEqual(
            re.findall(base.patterns['qsafe_char'], 'a;b"*,cd'),
            ['a', ';', 'b', '*', ',', 'c', 'd']
        )
        self.assertEqual(
            re.findall(base.patterns['param_value'],
                       '"quoted";not-quoted;start"after-illegal-quote',
                       re.VERBOSE),
            ['"quoted"', '', 'not-quoted', '', 'start', '',
             'after-illegal-quote', '']
        )
        match = base.line_re.match('TEST;ALTREP="http://www.wiz.org":value:;"')
        self.assertEqual(
            match.group('value'),
            'value:;"'
        )
        self.assertEqual(
            match.group('name'),
            'TEST'
        )
        self.assertEqual(
            match.group('params'),
            ';ALTREP="http://www.wiz.org"'
        )

    def test_stringToTextValues(self):
        """
        Test string lists
        """
        self.assertEqual(
            stringToTextValues(''),
            ['']
        )
        self.assertEqual(
            stringToTextValues('abcd,efgh'),
            ['abcd', 'efgh']
        )

    def test_stringToPeriod(self):
        """
        Test datetime strings
        """
        self.assertEqual(
            stringToPeriod("19970101T180000Z/19970102T070000Z"),
            (datetime.datetime(1997, 1, 1, 18, 0, tzinfo=tzutc()),
             datetime.datetime(1997, 1, 2, 7, 0, tzinfo=tzutc()))
        )
        self.assertEqual(
            stringToPeriod("19970101T180000Z/PT1H"),
            (datetime.datetime(1997, 1, 1, 18, 0, tzinfo=tzutc()),
             datetime.timedelta(0, 3600))
        )

    def test_timedeltaToString(self):
        """
        Test timedelta strings
        """
        self.assertEqual(
            timedeltaToString(two_hours),
            'PT2H'
        )
        self.assertEqual(
            timedeltaToString(datetime.timedelta(minutes=20)),
            'PT20M'
        )

    def test_vtimezone_creation(self):
        """
        Test timezones
        """
        tzs = dateutil.tz.tzical("test_files/timezones.ics")
        pacific = icalendar.TimezoneComponent(tzs.get('US/Pacific'))
        self.assertEqual(
            str(pacific),
            "<VTIMEZONE | <TZID{}US/Pacific>>"
        )
        santiago = icalendar.TimezoneComponent(tzs.get('Santiago'))
        self.assertEqual(
            str(santiago),
            "<VTIMEZONE | <TZID{}Santiago>>"
        )
        for year in range(2001, 2010):
            for month in (2, 9):
                dt = datetime.datetime(year, month, 15,
                                       tzinfo=tzs.get('Santiago'))
                self.assertTrue(dt.replace(tzinfo=tzs.get('Santiago')), dt)

    @staticmethod
    def test_timezone_serializing():
        """
        Serializing with timezones test
        """
        tzs = dateutil.tz.tzical("test_files/timezones.ics")
        pacific = tzs.get('US/Pacific')
        cal = base.Component('VCALENDAR')
        cal.setBehavior(icalendar.VCalendar2_0)
        ev = cal.add('vevent')
        ev.add('dtstart').value = datetime.datetime(2005, 10, 12, 9,
                                                    tzinfo=pacific)
        evruleset = rruleset()
        evruleset.rrule(rrule(WEEKLY, interval=2, byweekday=[2,4],
                              until=datetime.datetime(2005, 12, 15, 9)))
        evruleset.rrule(rrule(MONTHLY, bymonthday=[-1,-5]))
        evruleset.exdate(datetime.datetime(2005, 10, 14, 9, tzinfo=pacific))
        ev.rruleset = evruleset
        ev.add('duration').value = datetime.timedelta(hours=1)

        apple = tzs.get('America/Montreal')
        ev.dtstart.value = datetime.datetime(2005, 10, 12, 9, tzinfo=apple)

    def test_pytz_timezone_serializing(self):
        """
        Serializing with timezones from pytz test
        """
        try:
            import pytz
        except ImportError:
            return self.skipTest("pytz not installed")  # NOQA

        # Avoid conflicting cached tzinfo from other tests
        def unregister_tzid(tzid):
            """Clear tzid from icalendar TZID registry"""
            if icalendar.getTzid(tzid, False):
                icalendar.registerTzid(tzid, None)

        unregister_tzid('US/Eastern')
        eastern = pytz.timezone('US/Eastern')
        cal = base.Component('VCALENDAR')
        cal.setBehavior(icalendar.VCalendar2_0)
        ev = cal.add('vevent')
        ev.add('dtstart').value = eastern.localize(
            datetime.datetime(2008, 10, 12, 9))
        serialized = cal.serialize()

        expected_vtimezone = get_test_file("tz_us_eastern.ics")
        self.assertIn(
            expected_vtimezone.replace('\r\n', '\n'),
            serialized.replace('\r\n', '\n')
        )

        # Exhaustively test all zones (just looking for no errors)
        for tzname in pytz.all_timezones:
            unregister_tzid(tzname)
            tz = icalendar.TimezoneComponent(tzinfo=pytz.timezone(tzname))
            tz.serialize()

    def test_freeBusy(self):
        """
        Test freebusy components
        """
        test_cal = get_test_file("freebusy.ics")

        vfb = base.newFromBehavior('VFREEBUSY')
        vfb.add('uid').value = 'test'
        vfb.add('dtstart').value = datetime.datetime(2006, 2, 16, 1, tzinfo=utc)
        vfb.add('dtend').value   = vfb.dtstart.value + two_hours
        vfb.add('freebusy').value = [(vfb.dtstart.value, two_hours / 2)]
        vfb.add('freebusy').value = [(vfb.dtstart.value, vfb.dtend.value)]

        self.assertEqual(
            vfb.serialize().replace('\r\n', '\n'),
            test_cal.replace('\r\n', '\n')
        )

    def test_availablity(self):
        """
        Test availability components
        """
        test_cal = get_test_file("availablity.ics")

        vcal = base.newFromBehavior('VAVAILABILITY')
        vcal.add('uid').value = 'test'
        vcal.add('dtstamp').value = datetime.datetime(2006, 2, 15, 0, tzinfo=utc)
        vcal.add('dtstart').value = datetime.datetime(2006, 2, 16, 0, tzinfo=utc)
        vcal.add('dtend').value   = datetime.datetime(2006, 2, 17, 0, tzinfo=utc)
        vcal.add('busytype').value = "BUSY"

        av = base.newFromBehavior('AVAILABLE')
        av.add('uid').value = 'test1'
        av.add('dtstamp').value = datetime.datetime(2006, 2, 15, 0, tzinfo=utc)
        av.add('dtstart').value = datetime.datetime(2006, 2, 16, 9, tzinfo=utc)
        av.add('dtend').value   = datetime.datetime(2006, 2, 16, 12, tzinfo=utc)
        av.add('summary').value = "Available in the morning"

        vcal.add(av)

        self.assertEqual(
            vcal.serialize().replace('\r\n', '\n'),
            test_cal.replace('\r\n', '\n')
        )

    def test_recurrence(self):
        """
        Ensure date valued UNTILs in rrules are in a reasonable timezone,
        and include that day (12/28 in this test)
        """
        test_file = get_test_file("recurrence.ics")
        cal = base.readOne(test_file)
        dates = list(cal.vevent.getrruleset())
        self.assertEqual(
            dates[0],
            datetime.datetime(2006, 1, 26, 23, 0, tzinfo=tzutc())
        )
        self.assertEqual(
            dates[1],
            datetime.datetime(2006, 2, 23, 23, 0, tzinfo=tzutc())
        )
        self.assertEqual(
            dates[-1],
            datetime.datetime(2006, 12, 28, 23, 0, tzinfo=tzutc())
        )

    def test_recurring_component(self):
        """
        Test recurring events
        """
        vevent = RecurringComponent(name='VEVENT')

        # init
        self.assertTrue(vevent.isNative)

        # rruleset should be None at this point.
        # No rules have been passed or created.
        self.assertEqual(vevent.rruleset, None)

        # Now add start and rule for recurring event
        vevent.add('dtstart').value = datetime.datetime(2005, 1, 19, 9)
        vevent.add('rrule').value =u"FREQ=WEEKLY;COUNT=2;INTERVAL=2;BYDAY=TU,TH"
        self.assertEqual(
            list(vevent.rruleset),
            [datetime.datetime(2005, 1, 20, 9, 0), datetime.datetime(2005, 2, 1, 9, 0)]
        )
        self.assertEqual(
            list(vevent.getrruleset(addRDate=True)),
            [datetime.datetime(2005, 1, 19, 9, 0), datetime.datetime(2005, 1, 20, 9, 0)]
        )

        # Also note that dateutil will expand all-day events (datetime.date values)
        # to datetime.datetime value with time 0 and no timezone.
        vevent.dtstart.value = datetime.date(2005,3,18)
        self.assertEqual(
            list(vevent.rruleset),
            [datetime.datetime(2005, 3, 29, 0, 0), datetime.datetime(2005, 3, 31, 0, 0)]
        )
        self.assertEqual(
            list(vevent.getrruleset(True)),
            [datetime.datetime(2005, 3, 18, 0, 0), datetime.datetime(2005, 3, 29, 0, 0)]
        )


class TestChangeTZ(unittest.TestCase):
    """
    Tests for change_tz.change_tz
    """
    class StubCal(object):
        class StubEvent(object):
            class Node(object):
                def __init__(self, value):
                    self.value = value

            def __init__(self, dtstart, dtend):
                self.dtstart = self.Node(dtstart)
                self.dtend = self.Node(dtend)

        def __init__(self, dates):
            """
            dates is a list of tuples (dtstart, dtend)
            """
            self.vevent_list = [self.StubEvent(*d) for d in dates]

    def test_change_tz(self):
        """
        Change the timezones of events in a component to a different
        timezone
        """

        # Setup - create a stub vevent list
        old_tz = dateutil.tz.gettz('UTC')  # 0:00
        new_tz = dateutil.tz.gettz('America/Chicago')  # -5:00

        dates = [
            (datetime.datetime(1999, 12, 31, 23, 59, 59, 0, tzinfo=old_tz),
             datetime.datetime(2000, 1, 1, 0, 0, 0, 0, tzinfo=old_tz)),
            (datetime.datetime(2010, 12, 31, 23, 59, 59, 0, tzinfo=old_tz),
             datetime.datetime(2011, 1, 2, 3, 0, 0, 0, tzinfo=old_tz))]

        cal = self.StubCal(dates)

        # Exercise - change the timezone
        change_tz(cal, new_tz, dateutil.tz.gettz('UTC'))

        # Test - that the tzs were converted correctly
        expected_new_dates = [
            (datetime.datetime(1999, 12, 31, 17, 59, 59, 0, tzinfo=new_tz),
             datetime.datetime(1999, 12, 31, 18, 0, 0, 0, tzinfo=new_tz)),
            (datetime.datetime(2010, 12, 31, 17, 59, 59, 0, tzinfo=new_tz),
             datetime.datetime(2011, 1, 1, 21, 0, 0, 0, tzinfo=new_tz))]

        for vevent, expected_datepair in zip(cal.vevent_list,
                                             expected_new_dates):
            self.assertEqual(vevent.dtstart.value, expected_datepair[0])
            self.assertEqual(vevent.dtend.value, expected_datepair[1])

    def test_change_tz_utc_only(self):
        """
        Change any UTC timezones of events in a component to a different
        timezone
        """

        # Setup - create a stub vevent list
        utc_tz = dateutil.tz.gettz('UTC')  # 0:00
        non_utc_tz = dateutil.tz.gettz('America/Santiago')  # -4:00
        new_tz = dateutil.tz.gettz('America/Chicago')  # -5:00

        dates = [
            (datetime.datetime(1999, 12, 31, 23, 59, 59, 0, tzinfo=utc_tz),
             datetime.datetime(2000, 1, 1, 0, 0, 0, 0, tzinfo=non_utc_tz))]

        cal = self.StubCal(dates)

        # Exercise - change the timezone passing utc_only=True
        change_tz(cal, new_tz, dateutil.tz.gettz('UTC'), utc_only=True)

        # Test - that only the utc item has changed
        expected_new_dates = [
            (datetime.datetime(1999, 12, 31, 17, 59, 59, 0, tzinfo=new_tz),
             dates[0][1])]

        for vevent, expected_datepair in zip(cal.vevent_list,
                                             expected_new_dates):
            self.assertEqual(vevent.dtstart.value, expected_datepair[0])
            self.assertEqual(vevent.dtend.value, expected_datepair[1])

    def test_change_tz_default(self):
        """
        Change the timezones of events in a component to a different
        timezone, passing a default timezone that is assumed when the events
        don't have one
        """

        # Setup - create a stub vevent list
        new_tz = dateutil.tz.gettz('America/Chicago')  # -5:00

        dates = [
            (datetime.datetime(1999, 12, 31, 23, 59, 59, 0, tzinfo=None),
             datetime.datetime(2000, 1, 1, 0, 0, 0, 0, tzinfo=None))]

        cal = self.StubCal(dates)

        # Exercise - change the timezone
        change_tz(cal, new_tz, dateutil.tz.gettz('UTC'))

        # Test - that the tzs were converted correctly
        expected_new_dates = [
            (datetime.datetime(1999, 12, 31, 17, 59, 59, 0, tzinfo=new_tz),
             datetime.datetime(1999, 12, 31, 18, 0, 0, 0, tzinfo=new_tz))]

        for vevent, expected_datepair in zip(cal.vevent_list,
                                             expected_new_dates):
            self.assertEqual(vevent.dtstart.value, expected_datepair[0])
            self.assertEqual(vevent.dtend.value, expected_datepair[1])


if __name__ == '__main__':
    unittest.main()