libvcalendar.php
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libvcalendar.php
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	<?php

	/**
	* libcalendaring plugin's iCalendar functions tests
	*
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2013, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 of the
	* License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	class libvcalendar_test extends PHPUnit_Framework_TestCase
	{
	function setUp()
	{
	require_once __DIR__ . '/../libvcalendar.php';
	require_once __DIR__ . '/../libcalendaring.php';
	}

	/**
	* Simple iCal parsing test
	*/
	function test_import()
	{
	$ical = new libvcalendar();
	$ics = file_get_contents(__DIR__ . '/resources/snd.ics');
	$events = $ical->import($ics, 'UTF-8');

	$this->assertEquals(1, count($events));
	$event = $events[0];

	$this->assertInstanceOf('DateTime', $event['created'], "'created' property is DateTime object");
	$this->assertInstanceOf('DateTime', $event['changed'], "'changed' property is DateTime object");
	$this->assertEquals('UTC', $event['created']->getTimezone()->getName(), "'created' date is in UTC");

	$this->assertInstanceOf('DateTime', $event['start'], "'start' property is DateTime object");
	$this->assertInstanceOf('DateTime', $event['end'], "'end' property is DateTime object");
	$this->assertEquals('08-01', $event['start']->format('m-d'), "Start date is August 1st");
	$this->assertTrue($event['allday'], "All-day event flag");

	$this->assertEquals('B968B885-08FB-40E5-B89E-6DA05F26AA79', $event['uid'], "Event UID");
	$this->assertEquals('Swiss National Day', $event['title'], "Event title");
	$this->assertEquals('http://en.wikipedia.org/wiki/Swiss_National_Day', $event['url'], "URL property");
	$this->assertEquals(2, $event['sequence'], "Sequence number");

	$desclines = explode("\n", $event['description']);
	$this->assertEquals(4, count($desclines), "Multiline description");
	$this->assertEquals("French: Fête nationale Suisse", rtrim($desclines[1]), "UTF-8 encoding");
	}

	/**
	* Test parsing from files
	*/
	function test_import_from_file()
	{
	$ical = new libvcalendar();

	$events = $ical->import_from_file(__DIR__ . '/resources/multiple.ics', 'UTF-8');
	$this->assertEquals(2, count($events));

	$events = $ical->import_from_file(__DIR__ . '/resources/invalid.txt', 'UTF-8');
	$this->assertEmpty($events);
	}

	/**
	* Test parsing from files with multiple VCALENDAR blocks (#2884)
	*/
	function test_import_from_file_multiple()
	{
	$ical = new libvcalendar();
	$ical->fopen(__DIR__ . '/resources/multiple-rdate.ics', 'UTF-8');
	$events = array();
	foreach ($ical as $event) {
	$events[] = $event;
	}

	$this->assertEquals(2, count($events));
	$this->assertEquals("AAAA6A8C3CCE4EE2C1257B5C00FFFFFF-Lotus_Notes_Generated", $events[0]['uid']);
	$this->assertEquals("AAAA1C572093EC3FC125799C004AFFFF-Lotus_Notes_Generated", $events[1]['uid']);
	}

	function test_invalid_dates()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/invalid-dates.ics', 'UTF-8');
	$event = $events[0];

	$this->assertEquals(1, count($events), "Import event data");
	$this->assertFalse(array_key_exists('created', $event), "No created date field");
	$this->assertFalse(array_key_exists('changed', $event), "No changed date field");
	}

	function test_invalid_vevent()
	{
	$this->setExpectedException('\Sabre\VObject\ParseException');

	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/invalid-event.ics', 'UTF-8', true);
	}

	/**
	* Test some extended ical properties such as attendees, recurrence rules, alarms and attachments
	*/
	function test_extended()
	{
	$ical = new libvcalendar();

	$events = $ical->import_from_file(__DIR__ . '/resources/itip.ics', 'UTF-8');
	$event = $events[0];
	$this->assertEquals('REQUEST', $ical->method, "iTip method");

	// attendees
	$this->assertEquals(2, count($event['attendees']), "Attendees list (including organizer)");
	$organizer = $event['attendees'][0];
	$this->assertEquals('ORGANIZER', $organizer['role'], 'Organizer ROLE');
	$this->assertEquals('Rolf Test', $organizer['name'], 'Organizer name');

	$attendee = $event['attendees'][1];
	$this->assertEquals('REQ-PARTICIPANT', $attendee['role'], 'Attendee ROLE');
	$this->assertEquals('NEEDS-ACTION', $attendee['status'], 'Attendee STATUS');
	$this->assertEquals('rolf2@mykolab.com', $attendee['email'], 'Attendee mailto:');
	$this->assertTrue($attendee['rsvp'], 'Attendee RSVP');

	// attachments
	$this->assertEquals(1, count($event['attachments']), "Embedded attachments");
	$attachment = $event['attachments'][0];
	$this->assertEquals('text/html', $attachment['mimetype'], "Attachment mimetype attribute");
	$this->assertEquals('calendar.html', $attachment['name'], "Attachment filename (X-LABEL) attribute");
	$this->assertContains('<title>Kalender</title>', $attachment['data'], "Attachment content (decoded)");

	// recurrence rules
	$events = $ical->import_from_file(__DIR__ . '/resources/recurring.ics', 'UTF-8');
	$event = $events[0];

	$this->assertTrue(is_array($event['recurrence']), 'Recurrences rule as hash array');
	$rrule = $event['recurrence'];
	$this->assertEquals('MONTHLY', $rrule['FREQ'], "Recurrence frequency");
	$this->assertEquals('1', $rrule['INTERVAL'], "Recurrence interval");
	$this->assertEquals('3WE', $rrule['BYDAY'], "Recurrence frequency");
	$this->assertInstanceOf('DateTime', $rrule['UNTIL'], "Recurrence end date");

	$this->assertEquals(2, count($rrule['EXDATE']), "Recurrence EXDATEs");
	$this->assertInstanceOf('DateTime', $rrule['EXDATE'][0], "Recurrence EXDATE as DateTime");

	// categories, class
	$this->assertEquals('libcalendaring tests', join(',', (array)$event['categories']), "Event categories");
	$this->assertEquals('confidential', $event['sensitivity'], "Class/sensitivity = confidential");

	// parse a recurrence chain instance
	$events = $ical->import_from_file(__DIR__ . '/resources/recurrence-id.ics', 'UTF-8');
	$this->assertEquals(1, count($events), "Fall back to Component::getComponents() when getBaseComponents() is empty");
	$this->assertInstanceOf('DateTime', $events[0]['recurrence_date'], "Recurrence-ID as date");
	$this->assertTrue($events[0]['thisandfuture'], "Range=THISANDFUTURE");

	$this->assertEquals(count($events[0]['exceptions']), 1, "Second VEVENT as exception");
	$this->assertEquals($events[0]['exceptions'][0]['uid'], $events[0]['uid'], "Exception UID match");
	$this->assertEquals($events[0]['exceptions'][0]['sequence'], '2', "Exception sequence");
	}

	/**
	*
	*/
	function test_alarms()
	{
	$ical = new libvcalendar();

	$events = $ical->import_from_file(__DIR__ . '/resources/recurring.ics', 'UTF-8');
	$event = $events[0];

	$this->assertEquals('-12H:DISPLAY', $event['alarms'], "Serialized alarms string");
	$alarm = libcalendaring::parse_alarm_value($event['alarms']);
	$this->assertEquals('12', $alarm[0], "Alarm value");
	$this->assertEquals('-H', $alarm[1], "Alarm unit");

	$this->assertEquals('DISPLAY', $event['valarms'][0]['action'], "Full alarm item (action)");
	$this->assertEquals('-PT12H', $event['valarms'][0]['trigger'], "Full alarm item (trigger)");

	// alarm trigger with 0 values
	$events = $ical->import_from_file(__DIR__ . '/resources/alarms.ics', 'UTF-8');
	$event = $events[0];

	$this->assertEquals('-30M:DISPLAY', $event['alarms'], "Stripped alarm string");
	$alarm = libcalendaring::parse_alarm_value($event['alarms']);
	$this->assertEquals('30', $alarm[0], "Alarm value");
	$this->assertEquals('-M', $alarm[1], "Alarm unit");
	$this->assertEquals('-30M', $alarm[2], "Alarm string");
	$this->assertEquals('-PT30M', $alarm[3], "Unified alarm string (stripped zero-values)");

	$this->assertEquals('DISPLAY', $event['valarms'][0]['action'], "First alarm action");
	$this->assertEquals('This is the first event reminder', $event['valarms'][0]['description'], "First alarm text");

	$this->assertEquals(2, count($event['valarms']), "List all VALARM blocks");

	$valarm = $event['valarms'][1];
	$this->assertEquals(1, count($valarm['attendees']), "Email alarm attendees");
	$this->assertEquals('EMAIL', $valarm['action'], "Second alarm item (action)");
	$this->assertEquals('-P1D', $valarm['trigger'], "Second alarm item (trigger)");
	$this->assertEquals('This is the reminder message', $valarm['summary'], "Email alarm text");

	// test alarms export
	$ics = $ical->export(array($event));
	$this->assertContains('ACTION:DISPLAY', $ics, "Display alarm block");
	$this->assertContains('ACTION:EMAIL', $ics, "Email alarm block");
	$this->assertContains('DESCRIPTION:This is the first event reminder', $ics, "Alarm description");
	$this->assertContains('SUMMARY:This is the reminder message', $ics, "Email alarm summary");
	$this->assertContains('ATTENDEE:mailto:reminder-recipient@example.org', $ics, "Email alarm recipient");
	}

	/**
	* @depends test_import_from_file
	*/
	function test_attachment()
	{
	$ical = new libvcalendar();

	$events = $ical->import_from_file(__DIR__ . '/resources/attachment.ics', 'UTF-8');
	$event = $events[0];

	$this->assertEquals(2, count($events));
	$this->assertEquals(1, count($event['attachments']));
	$this->assertEquals('image/png', $event['attachments'][0]['mimetype']);
	$this->assertEquals('500px-Opensource.svg.png', $event['attachments'][0]['name']);
	}

	/**
	* @depends test_import
	*/
	function test_apple_alarms()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/apple-alarms.ics', 'UTF-8');
	$event = $events[0];

	// alarms
	$this->assertEquals('-45M:AUDIO', $event['alarms'], "Relative alarm string");
	$alarm = libcalendaring::parse_alarm_value($event['alarms']);
	$this->assertEquals('45', $alarm[0], "Alarm value");
	$this->assertEquals('-M', $alarm[1], "Alarm unit");

	$this->assertEquals(1, count($event['valarms']), "Ignore invalid alarm blocks");
	$this->assertEquals('AUDIO', $event['valarms'][0]['action'], "Full alarm item (action)");
	$this->assertEquals('-PT45M', $event['valarms'][0]['trigger'], "Full alarm item (trigger)");
	$this->assertEquals('Basso', $event['valarms'][0]['uri'], "Full alarm item (attachment)");
	}

	/**
	*
	*/
	function test_escaped_values()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/escaped.ics', 'UTF-8');
	$event = $events[0];

	$this->assertEquals("House, Street, Zip Place", $event['location'], "Decode escaped commas in location value");
	$this->assertEquals("Me, meets Them\nThem, meet Me", $event['description'], "Decode description value");
	$this->assertEquals("Kolab, Thomas", $event['attendees'][3]['name'], "Unescaped");

	$ics = $ical->export($events);
	$this->assertContains('ATTENDEE;CN="Kolab, Thomas";PARTSTAT=', $ics, "Quoted attendee parameters");
	}

	/**
	* Parse RDATE properties (#2885)
	*/
	function test_rdate()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/multiple-rdate.ics', 'UTF-8');
	$event = $events[0];

	$this->assertEquals(9, count($event['recurrence']['RDATE']));
	$this->assertInstanceOf('DateTime', $event['recurrence']['RDATE'][0]);
	}

	/**
	* @depends test_import
	*/
	function test_freebusy()
	{
	$ical = new libvcalendar();
	$ical->import_from_file(__DIR__ . '/resources/freebusy.ifb', 'UTF-8');
	$freebusy = $ical->freebusy;

	$this->assertInstanceOf('DateTime', $freebusy['start'], "'start' property is DateTime object");
	$this->assertInstanceOf('DateTime', $freebusy['end'], "'end' property is DateTime object");
	$this->assertEquals(11, count($freebusy['periods']), "Number of freebusy periods defined");
	$this->assertEquals(9, count($ical->get_busy_periods()), "Number of busy periods found");
	}

	/**
	* @depends test_import
	*/
	function test_freebusy_dummy()
	{
	$ical = new libvcalendar();
	$ical->import_from_file(__DIR__ . '/resources/dummy.ifb', 'UTF-8');
	$freebusy = $ical->freebusy;

	$this->assertEquals(0, count($freebusy['periods']), "Ignore 0-length freebudy periods");
	$this->assertContains('dummy', $freebusy['comment'], "Parse comment");
	}

	function test_vtodo()
	{
	$ical = new libvcalendar();
	$tasks = $ical->import_from_file(__DIR__ . '/resources/vtodo.ics', 'UTF-8', true);
	$task = $tasks[0];

	$this->assertInstanceOf('DateTime', $task['start'], "'start' property is DateTime object");
	$this->assertInstanceOf('DateTime', $task['due'], "'due' property is DateTime object");
	$this->assertEquals('-1D:DISPLAY', $task['alarms'], "Taks alarm value");
	$this->assertEquals('IN-PROCESS', $task['status'], "Task status property");
	$this->assertEquals(1, count($task['x-custom']), "Custom properties");
	$this->assertEquals(4, count($task['categories']));
	$this->assertEquals('1234567890-12345678-PARENT', $task['parent_id'], "Parent Relation");
	}

	/**
	* Test for iCal export from internal hash array representation
	*
	*
	*/
	function test_export()
	{
	$ical = new libvcalendar();

	$events = $ical->import_from_file(__DIR__ . '/resources/itip.ics', 'UTF-8');
	$event = $events[0];
	$events = $ical->import_from_file(__DIR__ . '/resources/recurring.ics', 'UTF-8');
	$event += $events[0];

	$this->attachment_data = $event['attachments'][0]['data'];
	unset($event['attachments'][0]['data']);
	$event['attachments'][0]['id'] = '1';
	$event['description'] = 'Exported by libvcalendar';

	$event['start']->setTimezone(new DateTimezone('Europe/Berlin'));
	$event['end']->setTimezone(new DateTimezone('Europe/Berlin'));

	$ics = $ical->export(array($event), 'REQUEST', false, array($this, 'get_attachment_data'), true);

	$this->assertContains('BEGIN:VCALENDAR', $ics, "VCALENDAR encapsulation BEGIN");

	$this->assertContains('BEGIN:VTIMEZONE', $ics, "VTIMEZONE encapsulation BEGIN");
	$this->assertContains('TZID:Europe/Berlin', $ics, "Timezone ID");
	$this->assertContains('TZOFFSETFROM:+0100', $ics, "Timzone transition FROM");
	$this->assertContains('TZOFFSETTO:+0200', $ics, "Timzone transition TO");
	$this->assertContains('END:VTIMEZONE', $ics, "VTIMEZONE encapsulation END");

	$this->assertContains('BEGIN:VEVENT', $ics, "VEVENT encapsulation BEGIN");
	$this->assertContains('UID:ac6b0aee-2519-4e5c-9a25-48c57064c9f0', $ics, "Event UID");
	$this->assertContains('SEQUENCE:' . $event['sequence'], $ics, "Export Sequence number");
	$this->assertContains('CLASS:CONFIDENTIAL', $ics, "Sensitivity => Class");
	$this->assertContains('DESCRIPTION:*Exported by', $ics, "Export Description");
	$this->assertContains('ORGANIZER;CN=Rolf Test:mailto:rolf@', $ics, "Export organizer");
	$this->assertRegExp('/ATTENDEE.*;ROLE=REQ-PARTICIPANT/', $ics, "Export Attendee ROLE");
	$this->assertRegExp('/ATTENDEE.*;PARTSTAT=NEEDS-ACTION/', $ics, "Export Attendee Status");
	$this->assertRegExp('/ATTENDEE.*;RSVP=TRUE/', $ics, "Export Attendee RSVP");
	$this->assertRegExp('/ATTENDEE.*:mailto:rolf2@/', $ics, "Export Attendee mailto:");

	$rrule = $event['recurrence'];
	$this->assertRegExp('/RRULE:.*FREQ='.$rrule['FREQ'].'/', $ics, "Export Recurrence Frequence");
	$this->assertRegExp('/RRULE:.*INTERVAL='.$rrule['INTERVAL'].'/', $ics, "Export Recurrence Interval");
	$this->assertRegExp('/RRULE:.*UNTIL=20140718T215959Z/', $ics, "Export Recurrence End date");
	$this->assertRegExp('/RRULE:.*BYDAY='.$rrule['BYDAY'].'/', $ics, "Export Recurrence BYDAY");
	$this->assertRegExp('/EXDATE.*:20131218/', $ics, "Export Recurrence EXDATE");

	$this->assertContains('BEGIN:VALARM', $ics, "Export VALARM");
	$this->assertContains('TRIGGER:-PT12H', $ics, "Export Alarm trigger");

	$this->assertRegExp('/ATTACH.*;VALUE=BINARY/', $ics, "Embed attachment");
	$this->assertRegExp('/ATTACH.*;ENCODING=BASE64/', $ics, "Attachment B64 encoding");
	$this->assertRegExp('!ATTACH.*;FMTTYPE=text/html!', $ics, "Attachment mimetype");
	$this->assertRegExp('!ATTACH.*;X-LABEL=calendar.html!', $ics, "Attachment filename with X-LABEL");

	$this->assertContains('END:VEVENT', $ics, "VEVENT encapsulation END");
	$this->assertContains('END:VCALENDAR', $ics, "VCALENDAR encapsulation END");
	}

	/**
	* @depends test_extended
	* @depends test_export
	*/
	function test_export_multiple()
	{
	$ical = new libvcalendar();
	$events = array_merge(
	$ical->import_from_file(__DIR__ . '/resources/snd.ics', 'UTF-8'),
	$ical->import_from_file(__DIR__ . '/resources/multiple.ics', 'UTF-8')
	);

	$num = count($events);
	$ics = $ical->export($events, null, false);

	$this->assertContains('BEGIN:VCALENDAR', $ics, "VCALENDAR encapsulation BEGIN");
	$this->assertContains('END:VCALENDAR', $ics, "VCALENDAR encapsulation END");
	$this->assertEquals($num, substr_count($ics, 'BEGIN:VEVENT'), "VEVENT encapsulation BEGIN");
	$this->assertEquals($num, substr_count($ics, 'END:VEVENT'), "VEVENT encapsulation END");
	}

	/**
	* @depends test_export
	*/
	function test_export_recurrence_exceptions()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/recurring.ics', 'UTF-8');

	// add exceptions
	$event = $events[0];
	$exception1 = $event;
	$exception1['start'] = clone $event['start'];
	$exception1['start']->setDate(2013, 8, 14);
	$exception1['end'] = clone $event['end'];
	$exception1['end']->setDate(2013, 8, 14);

	$exception2 = $event;
	$exception2['start'] = clone $event['start'];
	$exception2['start']->setDate(2013, 11, 13);
	$exception2['end'] = clone $event['end'];
	$exception2['end']->setDate(2013, 11, 13);
	$exception2['title'] = 'Recurring Exception';

	$events[0]['recurrence']['EXCEPTIONS'] = array($exception1, $exception2);

	$ics = $ical->export($events, null, false);

	$num = count($events[0]['recurrence']['EXCEPTIONS']) + 1;
	$this->assertEquals($num, substr_count($ics, 'BEGIN:VEVENT'), "VEVENT encapsulation BEGIN");
	$this->assertEquals($num, substr_count($ics, 'UID:'.$event['uid']), "Recurrence Exceptions with same UID");
	$this->assertEquals($num, substr_count($ics, 'END:VEVENT'), "VEVENT encapsulation END");

	$this->assertContains('RECURRENCE-ID;VALUE=DATE-TIME;TZID=Europe/Zurich:20130814', $ics, "Recurrence-ID (1) being the exception date");
	$this->assertContains('RECURRENCE-ID;VALUE=DATE-TIME;TZID=Europe/Zurich:20131113', $ics, "Recurrence-ID (2) being the exception date");
	$this->assertContains('SUMMARY:'.$exception2['title'], $ics, "Exception title");
	}

	function test_export_valid_rrules()
	{
	$event = array(
	'uid' => '1234567890',
	'start' => new DateTime('now'),
	'end' => new DateTime('now + 30min'),
	'title' => 'test_export_valid_rrules',
	'recurrence' => array(
	'FREQ' => 'DAILY',
	'COUNT' => 5,
	'EXDATE' => array(),
	'RDATE' => array(),
	),
	);
	$ical = new libvcalendar();
	$ics = $ical->export(array($event), null, false, null, false);

	$this->assertNotContains('EXDATE=', $ics);
	$this->assertNotContains('RDATE=', $ics);
	}

	/**
	*
	*/
	function test_export_rdate()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/multiple-rdate.ics', 'UTF-8');
	$ics = $ical->export($events, null, false);

	$this->assertContains('RDATE;VALUE=DATE-TIME:20140520T020000Z', $ics, "VALUE=PERIOD is translated into single DATE-TIME values");
	}

	/**
	* @depends test_export
	*/
	function test_export_direct()
	{
	$ical = new libvcalendar();
	$events = $ical->import_from_file(__DIR__ . '/resources/multiple.ics', 'UTF-8');
	$num = count($events);

	ob_start();
	$return = $ical->export($events, null, true);
	$output = ob_get_contents();
	ob_end_clean();

	$this->assertTrue($return, "Return true on successful writing");
	$this->assertContains('BEGIN:VCALENDAR', $output, "VCALENDAR encapsulation BEGIN");
	$this->assertContains('END:VCALENDAR', $output, "VCALENDAR encapsulation END");
	$this->assertEquals($num, substr_count($output, 'BEGIN:VEVENT'), "VEVENT encapsulation BEGIN");
	$this->assertEquals($num, substr_count($output, 'END:VEVENT'), "VEVENT encapsulation END");
	}

	function test_datetime()
	{
	$ical = new libvcalendar();
	$localtime = $ical->datetime_prop('DTSTART', new DateTime('2013-09-01 12:00:00', new DateTimeZone('Europe/Berlin')));
	$localdate = $ical->datetime_prop('DTSTART', new DateTime('2013-09-01', new DateTimeZone('Europe/Berlin')), false, true);
	$utctime = $ical->datetime_prop('DTSTART', new DateTime('2013-09-01 12:00:00', new DateTimeZone('UTC')));
	$asutctime = $ical->datetime_prop('DTSTART', new DateTime('2013-09-01 12:00:00', new DateTimeZone('Europe/Berlin')), true);

	$this->assertContains('TZID=Europe/Berlin', $localtime->serialize());
	$this->assertContains('VALUE=DATE', $localdate->serialize());
	$this->assertContains('20130901T120000Z', $utctime->serialize());
	$this->assertContains('20130901T100000Z', $asutctime->serialize());
	}

	function test_get_vtimezone()
	{
	$vtz = libvcalendar::get_vtimezone('Europe/Berlin', strtotime('2014-08-22T15:00:00+02:00'));
	$this->assertInstanceOf('\Sabre\VObject\Component', $vtz, "VTIMEZONE is a Component object");
	$this->assertEquals('Europe/Berlin', $vtz->TZID);
	$this->assertEquals('4', $vtz->{'X-MICROSOFT-CDO-TZID'});

	// check for transition to daylight saving time which is BEFORE the given date
	$dst = reset($vtz->select('DAYLIGHT'));
	$this->assertEquals('DAYLIGHT', $dst->name);
	$this->assertEquals('20140330T010000', $dst->DTSTART);
	$this->assertEquals('+0100', $dst->TZOFFSETFROM);
	$this->assertEquals('+0200', $dst->TZOFFSETTO);
	$this->assertEquals('CEST', $dst->TZNAME);

	// check (last) transition to standard time which is AFTER the given date
	$std = end($vtz->select('STANDARD'));
	$this->assertEquals('STANDARD', $std->name);
	$this->assertEquals('20141026T010000', $std->DTSTART);
	$this->assertEquals('+0200', $std->TZOFFSETFROM);
	$this->assertEquals('+0100', $std->TZOFFSETTO);
	$this->assertEquals('CET', $std->TZNAME);

	// unknown timezone
	$vtz = libvcalendar::get_vtimezone('America/Foo Bar');
	$this->assertEquals(false, $vtz);

	// invalid input data
	$vtz = libvcalendar::get_vtimezone(new DateTime());
	$this->assertEquals(false, $vtz);

	// DateTimezone as input data
	$vtz = libvcalendar::get_vtimezone(new DateTimezone('Pacific/Chatham'));
	$this->assertInstanceOf('\Sabre\VObject\Component', $vtz);
	$this->assertContains('TZOFFSETFROM:+1245', $vtz->serialize());
	$this->assertContains('TZOFFSETTO:+1345', $vtz->serialize());
	}

	function get_attachment_data($id, $event)
	{
	return $this->attachment_data;
	}
	}

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