Update DAV unit tests to PSR-4

8 files changed, 1681 insertions, 0 deletions

diff --git a/apps/dav/tests/unit/CardDAV/AddressBookImplTest.php b/apps/dav/tests/unit/CardDAV/AddressBookImplTest.php
new file mode 100644
index 00000000000..25da92bbf23
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/AddressBookImplTest.php
@@ -0,0 +1,288 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+
+use OCA\DAV\CardDAV\AddressBook;
+use OCA\DAV\CardDAV\AddressBookImpl;
+use OCA\DAV\CardDAV\CardDavBackend;
+use Sabre\VObject\Component\VCard;
+use Sabre\VObject\Property\Text;
+use Test\TestCase;
+
+class AddressBookImplTest extends TestCase {
+
+	/** @var AddressBookImpl  */
+	private $addressBookImpl;
+
+	/** @var  array */
+	private $addressBookInfo;
+
+	/** @var  AddressBook | \PHPUnit_Framework_MockObject_MockObject */
+	private $addressBook;
+
+	/** @var  CardDavBackend | \PHPUnit_Framework_MockObject_MockObject */
+	private $backend;
+
+	/** @var  VCard | \PHPUnit_Framework_MockObject_MockObject */
+	private $vCard;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->addressBookInfo = [
+			'id' => 42,
+			'{DAV:}displayname' => 'display name'
+		];
+		$this->addressBook = $this->getMockBuilder('OCA\DAV\CardDAV\AddressBook')
+			->disableOriginalConstructor()->getMock();
+		$this->backend = $this->getMockBuilder('\OCA\DAV\CardDAV\CardDavBackend')
+			->disableOriginalConstructor()->getMock();
+		$this->vCard = $this->getMock('Sabre\VObject\Component\VCard');
+
+		$this->addressBookImpl = new AddressBookImpl(
+			$this->addressBook,
+			$this->addressBookInfo,
+			$this->backend
+		);
+	}
+
+	public function testGetKey() {
+		$this->assertSame($this->addressBookInfo['id'],
+			$this->addressBookImpl->getKey());
+	}
+
+	public function testGetDisplayName() {
+		$this->assertSame($this->addressBookInfo['{DAV:}displayname'],
+			$this->addressBookImpl->getDisplayName());
+	}
+
+	public function testSearch() {
+
+		/** @var \PHPUnit_Framework_MockObject_MockObject | AddressBookImpl $addressBookImpl */
+		$addressBookImpl = $this->getMockBuilder('OCA\DAV\CardDAV\AddressBookImpl')
+			->setConstructorArgs(
+				[
+					$this->addressBook,
+					$this->addressBookInfo,
+					$this->backend
+				]
+			)
+			->setMethods(['vCard2Array', 'readCard'])
+			->getMock();
+
+		$pattern = 'pattern';
+		$searchProperties = 'properties';
+
+		$this->backend->expects($this->once())->method('search')
+			->with($this->addressBookInfo['id'], $pattern, $searchProperties)
+			->willReturn(
+				[
+					'cardData1',
+					'cardData2'
+				]
+			);
+
+		$addressBookImpl->expects($this->exactly(2))->method('readCard')
+			->willReturn($this->vCard);
+		$addressBookImpl->expects($this->exactly(2))->method('vCard2Array')
+			->with($this->vCard)->willReturn('vCard');
+
+		$result = $addressBookImpl->search($pattern, $searchProperties, []);
+		$this->assertTrue((is_array($result)));
+		$this->assertSame(2, count($result));
+	}
+
+	/**
+	 * @dataProvider dataTestCreate
+	 *
+	 * @param array $properties
+	 */
+	public function testCreate($properties) {
+
+		$uid = 'uid';
+
+		/** @var \PHPUnit_Framework_MockObject_MockObject | AddressBookImpl $addressBookImpl */
+		$addressBookImpl = $this->getMockBuilder('OCA\DAV\CardDAV\AddressBookImpl')
+			->setConstructorArgs(
+				[
+					$this->addressBook,
+					$this->addressBookInfo,
+					$this->backend
+				]
+			)
+			->setMethods(['vCard2Array', 'createUid', 'createEmptyVCard'])
+			->getMock();
+
+		$addressBookImpl->expects($this->once())->method('createUid')
+			->willReturn($uid);
+		$addressBookImpl->expects($this->once())->method('createEmptyVCard')
+			->with($uid)->willReturn($this->vCard);
+		$this->vCard->expects($this->exactly(count($properties)))
+			->method('createProperty');
+		$this->backend->expects($this->once())->method('createCard');
+		$this->backend->expects($this->never())->method('updateCard');
+		$this->backend->expects($this->never())->method('getCard');
+		$addressBookImpl->expects($this->once())->method('vCard2Array')
+			->with($this->vCard)->willReturn(true);
+
+		$this->assertTrue($addressBookImpl->createOrUpdate($properties));
+	}
+
+	public function dataTestCreate() {
+		return [
+			[[]],
+			[['FN' => 'John Doe']]
+		];
+	}
+
+	public function testUpdate() {
+
+		$uid = 'uid';
+		$properties = ['UID' => $uid, 'FN' => 'John Doe'];
+
+		/** @var \PHPUnit_Framework_MockObject_MockObject | AddressBookImpl $addressBookImpl */
+		$addressBookImpl = $this->getMockBuilder('OCA\DAV\CardDAV\AddressBookImpl')
+			->setConstructorArgs(
+				[
+					$this->addressBook,
+					$this->addressBookInfo,
+					$this->backend
+				]
+			)
+			->setMethods(['vCard2Array', 'createUid', 'createEmptyVCard', 'readCard'])
+			->getMock();
+
+		$addressBookImpl->expects($this->never())->method('createUid');
+		$addressBookImpl->expects($this->never())->method('createEmptyVCard');
+		$this->backend->expects($this->once())->method('getCard')
+			->with($this->addressBookInfo['id'], $uid . '.vcf')
+			->willReturn(['carddata' => 'data']);
+		$addressBookImpl->expects($this->once())->method('readCard')
+			->with('data')->willReturn($this->vCard);
+		$this->vCard->expects($this->exactly(count($properties)))
+			->method('createProperty');
+		$this->backend->expects($this->never())->method('createCard');
+		$this->backend->expects($this->once())->method('updateCard');
+		$addressBookImpl->expects($this->once())->method('vCard2Array')
+			->with($this->vCard)->willReturn(true);
+
+		$this->assertTrue($addressBookImpl->createOrUpdate($properties));
+	}
+
+	/**
+	 * @dataProvider dataTestGetPermissions
+	 *
+	 * @param array $permissions
+	 * @param int $expected
+	 */
+	public function testGetPermissions($permissions, $expected) {
+		$this->addressBook->expects($this->once())->method('getACL')
+			->willReturn($permissions);
+
+		$this->assertSame($expected,
+			$this->addressBookImpl->getPermissions()
+		);
+	}
+
+	public function dataTestGetPermissions() {
+		return [
+			[[], 0],
+			[[['privilege' => '{DAV:}read']], 1],
+			[[['privilege' => '{DAV:}write']], 6],
+			[[['privilege' => '{DAV:}all']], 31],
+			[[['privilege' => '{DAV:}read'],['privilege' => '{DAV:}write']], 7],
+			[[['privilege' => '{DAV:}read'],['privilege' => '{DAV:}all']], 31],
+			[[['privilege' => '{DAV:}all'],['privilege' => '{DAV:}write']], 31],
+			[[['privilege' => '{DAV:}read'],['privilege' => '{DAV:}write'],['privilege' => '{DAV:}all']], 31],
+			[[['privilege' => '{DAV:}all'],['privilege' => '{DAV:}read'],['privilege' => '{DAV:}write']], 31],
+		];
+	}
+
+	public function testDelete() {
+		$cardId = 1;
+		$cardUri = 'cardUri';
+		$this->backend->expects($this->once())->method('getCardUri')
+			->with($cardId)->willReturn($cardUri);
+		$this->backend->expects($this->once())->method('deleteCard')
+			->with($this->addressBookInfo['id'], $cardUri)
+			->willReturn(true);
+
+		$this->assertTrue($this->addressBookImpl->delete($cardId));
+	}
+
+	public function testReadCard() {
+		$vCard = new VCard();
+		$vCard->add(new Text($vCard, 'UID', 'uid'));
+		$vCardSerialized = $vCard->serialize();
+
+		$result = $this->invokePrivate($this->addressBookImpl, 'readCard', [$vCardSerialized]);
+		$resultSerialized = $result->serialize();
+
+		$this->assertSame($vCardSerialized, $resultSerialized);
+	}
+
+	public function testCreateUid() {
+		/** @var \PHPUnit_Framework_MockObject_MockObject | AddressBookImpl $addressBookImpl */
+		$addressBookImpl = $this->getMockBuilder('OCA\DAV\CardDAV\AddressBookImpl')
+			->setConstructorArgs(
+				[
+					$this->addressBook,
+					$this->addressBookInfo,
+					$this->backend
+				]
+			)
+			->setMethods(['getUid'])
+			->getMock();
+
+		$addressBookImpl->expects($this->at(0))->method('getUid')->willReturn('uid0');
+		$addressBookImpl->expects($this->at(1))->method('getUid')->willReturn('uid1');
+
+		// simulate that 'uid0' already exists, so the second uid will be returned
+		$this->backend->expects($this->exactly(2))->method('getContact')
+			->willReturnCallback(
+				function($id, $uid) {
+					return ($uid === 'uid0.vcf');
+				}
+			);
+
+		$this->assertSame('uid1',
+			$this->invokePrivate($addressBookImpl, 'createUid', [])
+		);
+
+	}
+
+	public function testCreateEmptyVCard() {
+		$uid = 'uid';
+		$expectedVCard = new VCard();
+		$expectedVCard->add(new Text($expectedVCard, 'UID', $uid));
+		$expectedVCardSerialized = $expectedVCard->serialize();
+
+		$result = $this->invokePrivate($this->addressBookImpl, 'createEmptyVCard', [$uid]);
+		$resultSerialized = $result->serialize();
+
+		$this->assertSame($expectedVCardSerialized, $resultSerialized);
+	}
+
+}
diff --git a/apps/dav/tests/unit/CardDAV/AddressBookTest.php b/apps/dav/tests/unit/CardDAV/AddressBookTest.php
new file mode 100644
index 00000000000..7144c36140c
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/AddressBookTest.php
@@ -0,0 +1,139 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+use OCA\DAV\CardDAV\AddressBook;
+use OCA\DAV\CardDAV\CardDavBackend;
+use Sabre\DAV\PropPatch;
+use Test\TestCase;
+
+class AddressBookTest extends TestCase {
+
+	public function testDelete() {
+		/** @var \PHPUnit_Framework_MockObject_MockObject | CardDavBackend $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')->disableOriginalConstructor()->getMock();
+		$backend->expects($this->once())->method('updateShares');
+		$backend->expects($this->any())->method('getShares')->willReturn([
+			['href' => 'principal:user2']
+		]);
+		$calendarInfo = [
+			'{http://owncloud.org/ns}owner-principal' => 'user1',
+			'principaluri' => 'user2',
+			'id' => 666
+		];
+		$c = new AddressBook($backend, $calendarInfo);
+		$c->delete();
+	}
+
+	/**
+	 * @expectedException \Sabre\DAV\Exception\Forbidden
+	 */
+	public function testDeleteFromGroup() {
+		/** @var \PHPUnit_Framework_MockObject_MockObject | CardDavBackend $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')->disableOriginalConstructor()->getMock();
+		$backend->expects($this->never())->method('updateShares');
+		$backend->expects($this->any())->method('getShares')->willReturn([
+			['href' => 'principal:group2']
+		]);
+		$calendarInfo = [
+			'{http://owncloud.org/ns}owner-principal' => 'user1',
+			'principaluri' => 'user2',
+			'id' => 666
+		];
+		$c = new AddressBook($backend, $calendarInfo);
+		$c->delete();
+	}
+
+	/**
+	 * @expectedException \Sabre\DAV\Exception\Forbidden
+	 */
+	public function testPropPatch() {
+		/** @var \PHPUnit_Framework_MockObject_MockObject | CardDavBackend $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')->disableOriginalConstructor()->getMock();
+		$calendarInfo = [
+			'{http://owncloud.org/ns}owner-principal' => 'user1',
+			'principaluri' => 'user2',
+			'id' => 666
+		];
+		$c = new AddressBook($backend, $calendarInfo);
+		$c->propPatch(new PropPatch([]));
+	}
+
+	/**
+	 * @dataProvider providesReadOnlyInfo
+	 */
+	public function testAcl($expectsWrite, $readOnlyValue, $hasOwnerSet) {
+		/** @var \PHPUnit_Framework_MockObject_MockObject | CardDavBackend $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')->disableOriginalConstructor()->getMock();
+		$backend->expects($this->any())->method('applyShareAcl')->willReturnArgument(1);
+		$calendarInfo = [
+			'principaluri' => 'user2',
+			'id' => 666,
+			'uri' => 'default'
+		];
+		if (!is_null($readOnlyValue)) {
+			$calendarInfo['{http://owncloud.org/ns}read-only'] = $readOnlyValue;
+		}
+		if ($hasOwnerSet) {
+			$calendarInfo['{http://owncloud.org/ns}owner-principal'] = 'user1';
+		}
+		$c = new AddressBook($backend, $calendarInfo);
+		$acl = $c->getACL();
+		$childAcl = $c->getChildACL();
+
+		$expectedAcl = [[
+			'privilege' => '{DAV:}read',
+			'principal' => $hasOwnerSet ? 'user1' : 'user2',
+			'protected' => true
+		], [
+			'privilege' => '{DAV:}write',
+			'principal' => $hasOwnerSet ? 'user1' : 'user2',
+			'protected' => true
+		]];
+		if ($hasOwnerSet) {
+			$expectedAcl[] = [
+				'privilege' => '{DAV:}read',
+				'principal' => 'user2',
+				'protected' => true
+			];
+			if ($expectsWrite) {
+				$expectedAcl[] = [
+					'privilege' => '{DAV:}write',
+					'principal' => 'user2',
+					'protected' => true
+				];
+			}
+		}
+		$this->assertEquals($expectedAcl, $acl);
+		$this->assertEquals($expectedAcl, $childAcl);
+	}
+
+	public function providesReadOnlyInfo() {
+		return [
+			'read-only property not set' => [true, null, true],
+			'read-only property is false' => [true, false, true],
+			'read-only property is true' => [false, true, true],
+			'read-only property not set and no owner' => [true, null, false],
+			'read-only property is false and no owner' => [true, false, false],
+			'read-only property is true and no owner' => [false, true, false],
+		];
+	}}
diff --git a/apps/dav/tests/unit/CardDAV/BirthdayServiceTest.php b/apps/dav/tests/unit/CardDAV/BirthdayServiceTest.php
new file mode 100644
index 00000000000..0162924064d
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/BirthdayServiceTest.php
@@ -0,0 +1,216 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+use OCA\DAV\CalDAV\BirthdayService;
+use OCA\DAV\CalDAV\CalDavBackend;
+use OCA\DAV\CardDAV\CardDavBackend;
+use OCA\DAV\DAV\GroupPrincipalBackend;
+use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Reader;
+use Test\TestCase;
+
+class BirthdayServiceTest extends TestCase {
+
+	/** @var BirthdayService */
+	private $service;
+	/** @var CalDavBackend | \PHPUnit_Framework_MockObject_MockObject */
+	private $calDav;
+	/** @var CardDavBackend | \PHPUnit_Framework_MockObject_MockObject */
+	private $cardDav;
+	/** @var GroupPrincipalBackend | \PHPUnit_Framework_MockObject_MockObject */
+	private $groupPrincialBackend;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->calDav = $this->getMockBuilder('OCA\DAV\CalDAV\CalDavBackend')->disableOriginalConstructor()->getMock();
+		$this->cardDav = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')->disableOriginalConstructor()->getMock();
+		$this->groupPrincialBackend = $this->getMockBuilder('OCA\DAV\DAV\GroupPrincipalBackend')->disableOriginalConstructor()->getMock();
+
+		$this->service = new BirthdayService($this->calDav, $this->cardDav, $this->groupPrincialBackend);
+	}
+
+	/**
+	 * @dataProvider providesVCards
+	 * @param boolean $nullExpected
+	 * @param string | null $data
+	 */
+	public function testBuildBirthdayFromContact($nullExpected, $data) {
+		$cal = $this->service->buildBirthdayFromContact($data);
+		if ($nullExpected) {
+			$this->assertNull($cal);
+		} else {
+			$this->assertInstanceOf('Sabre\VObject\Component\VCalendar', $cal);
+			$this->assertTrue(isset($cal->VEVENT));
+			$this->assertEquals('FREQ=YEARLY', $cal->VEVENT->RRULE->getValue());
+			$this->assertEquals('12345 (*1900)', $cal->VEVENT->SUMMARY->getValue());
+			$this->assertEquals('TRANSPARENT', $cal->VEVENT->TRANSP->getValue());
+		}
+	}
+
+	public function testOnCardDeleted() {
+		$this->cardDav->expects($this->once())->method('getAddressBookById')
+			->with(666)
+			->willReturn([
+			'principaluri' => 'principals/users/user01',
+			'uri' => 'default'
+		]);
+		$this->calDav->expects($this->once())->method('getCalendarByUri')
+			->with('principals/users/user01', 'contact_birthdays')
+			->willReturn([
+			'id' => 1234
+		]);
+		$this->calDav->expects($this->once())->method('deleteCalendarObject')->with(1234, 'default-gump.vcf.ics');
+		$this->cardDav->expects($this->once())->method('getShares')->willReturn([]);
+
+		$this->service->onCardDeleted(666, 'gump.vcf');
+	}
+
+	/**
+	 * @dataProvider providesCardChanges
+	 */
+	public function testOnCardChanged($expectedOp) {
+		$this->cardDav->expects($this->once())->method('getAddressBookById')
+			->with(666)
+			->willReturn([
+				'principaluri' => 'principals/users/user01',
+				'uri' => 'default'
+			]);
+		$this->calDav->expects($this->once())->method('getCalendarByUri')
+			->with('principals/users/user01', 'contact_birthdays')
+			->willReturn([
+				'id' => 1234
+			]);
+		$this->cardDav->expects($this->once())->method('getShares')->willReturn([]);
+
+		/** @var BirthdayService | \PHPUnit_Framework_MockObject_MockObject $service */
+		$service = $this->getMock('\OCA\DAV\CalDAV\BirthdayService',
+			['buildBirthdayFromContact', 'birthdayEvenChanged'], [$this->calDav, $this->cardDav, $this->groupPrincialBackend]);
+
+		if ($expectedOp === 'delete') {
+			$this->calDav->expects($this->once())->method('getCalendarObject')->willReturn('');
+			$service->expects($this->once())->method('buildBirthdayFromContact')->willReturn(null);
+			$this->calDav->expects($this->once())->method('deleteCalendarObject')->with(1234, 'default-gump.vcf.ics');
+		}
+		if ($expectedOp === 'create') {
+			$service->expects($this->once())->method('buildBirthdayFromContact')->willReturn(new VCalendar());
+			$this->calDav->expects($this->once())->method('createCalendarObject')->with(1234, 'default-gump.vcf.ics', "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nEND:VCALENDAR\r\n");
+		}
+		if ($expectedOp === 'update') {
+			$service->expects($this->once())->method('buildBirthdayFromContact')->willReturn(new VCalendar());
+			$service->expects($this->once())->method('birthdayEvenChanged')->willReturn(true);
+			$this->calDav->expects($this->once())->method('getCalendarObject')->willReturn([
+				'calendardata' => '']);
+			$this->calDav->expects($this->once())->method('updateCalendarObject')->with(1234, 'default-gump.vcf.ics', "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nEND:VCALENDAR\r\n");
+		}
+
+		$service->onCardChanged(666, 'gump.vcf', '');
+	}
+
+	/**
+	 * @dataProvider providesBirthday
+	 * @param $expected
+	 * @param $old
+	 * @param $new
+	 */
+	public function testBirthdayEvenChanged($expected, $old, $new) {
+		$new = Reader::read($new);
+		$this->assertEquals($expected, $this->service->birthdayEvenChanged($old, $new));
+	}
+
+	public function testGetAllAffectedPrincipals() {
+		$this->cardDav->expects($this->once())->method('getShares')->willReturn([
+			[
+				'{http://owncloud.org/ns}group-share' => false,
+				'{http://owncloud.org/ns}principal' => 'principals/users/user01'
+			],
+			[
+				'{http://owncloud.org/ns}group-share' => false,
+				'{http://owncloud.org/ns}principal' => 'principals/users/user01'
+			],
+			[
+				'{http://owncloud.org/ns}group-share' => false,
+				'{http://owncloud.org/ns}principal' => 'principals/users/user02'
+			],
+			[
+				'{http://owncloud.org/ns}group-share' => true,
+				'{http://owncloud.org/ns}principal' => 'principals/groups/users'
+			],
+		]);
+		$this->groupPrincialBackend->expects($this->once())->method('getGroupMemberSet')
+			->willReturn([
+				[
+					'uri' => 'principals/users/user01',
+				],
+				[
+					'uri' => 'principals/users/user02',
+				],
+				[
+					'uri' => 'principals/users/user03',
+				],
+			]);
+		$users = $this->invokePrivate($this->service, 'getAllAffectedPrincipals', [6666]);
+		$this->assertEquals([
+			'principals/users/user01',
+			'principals/users/user02',
+			'principals/users/user03'
+		], $users);
+	}
+
+	public function providesBirthday() {
+		return [
+			[true,
+				'',
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000101\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:12345's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n"],
+			[false,
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000101\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:12345's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000101\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:12345's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n"],
+			[true,
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000101\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:4567's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000101\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:12345's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n"],
+			[true,
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000101\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:12345's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
+				"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nCALSCALE:GREGORIAN\r\nBEGIN:VEVENT\r\nUID:12345\r\nDTSTAMP:20160218T133704Z\r\nDTSTART;VALUE=DATE:19000102\r\nDTEND;VALUE=DATE:19000102\r\nRRULE:FREQ=YEARLY\r\nSUMMARY:12345's Birthday (1900)\r\nTRANSP:TRANSPARENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n"]
+		];
+	}
+
+	public function providesCardChanges(){
+		return[
+			['delete'],
+			['create'],
+			['update']
+		];
+	}
+
+	public function providesVCards() {
+		return [
+			[true, null],
+			[true, ''],
+			[true, 'yasfewf'],
+			[true, "BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nEND:VCARD\r\n", "Dr. Foo Bar"],
+			[true, "BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nBDAY:\r\nEND:VCARD\r\n", "Dr. Foo Bar"],
+			[true, "BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nBDAY:someday\r\nEND:VCARD\r\n", "Dr. Foo Bar"],
+			[false, "BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nBDAY:1900-01-01\r\nEND:VCARD\r\n", "Dr. Foo Bar"],
+		];
+	}
+}
diff --git a/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php b/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php
new file mode 100644
index 00000000000..7cae76ae62b
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/CardDavBackendTest.php
@@ -0,0 +1,632 @@
+<?php
+/**
+ * @author Arthur Schiwon <blizzz@owncloud.com>
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+use InvalidArgumentException;
+use OCA\DAV\CardDAV\AddressBook;
+use OCA\DAV\CardDAV\CardDavBackend;
+use OCA\DAV\Connector\Sabre\Principal;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+use Sabre\DAV\PropPatch;
+use Sabre\VObject\Component\VCard;
+use Sabre\VObject\Property\Text;
+use Test\TestCase;
+
+/**
+ * Class CardDavBackendTest
+ *
+ * @group DB
+ *
+ * @package OCA\DAV\Tests\unit\CardDAV
+ */
+class CardDavBackendTest extends TestCase {
+
+	/** @var CardDavBackend */
+	private $backend;
+
+	/** @var Principal | \PHPUnit_Framework_MockObject_MockObject */
+	private $principal;
+
+	/** @var  IDBConnection */
+	private $db;
+
+	/** @var string */
+	private $dbCardsTable = 'cards';
+
+	/** @var string */
+	private $dbCardsPropertiesTable = 'cards_properties';
+
+	const UNIT_TEST_USER = 'principals/users/carddav-unit-test';
+	const UNIT_TEST_USER1 = 'principals/users/carddav-unit-test1';
+	const UNIT_TEST_GROUP = 'principals/groups/carddav-unit-test-group';
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->principal = $this->getMockBuilder('OCA\DAV\Connector\Sabre\Principal')
+			->disableOriginalConstructor()
+			->setMethods(['getPrincipalByPath', 'getGroupMembership'])
+			->getMock();
+		$this->principal->method('getPrincipalByPath')
+			->willReturn([
+				'uri' => 'principals/best-friend'
+			]);
+		$this->principal->method('getGroupMembership')
+			->withAnyParameters()
+			->willReturn([self::UNIT_TEST_GROUP]);
+
+		$this->db = \OC::$server->getDatabaseConnection();
+
+		$this->backend = new CardDavBackend($this->db, $this->principal, null);
+
+		// start every test with a empty cards_properties and cards table
+		$query = $this->db->getQueryBuilder();
+		$query->delete('cards_properties')->execute();
+		$query = $this->db->getQueryBuilder();
+		$query->delete('cards')->execute();
+
+
+		$this->tearDown();
+	}
+
+	public function tearDown() {
+		parent::tearDown();
+
+		if (is_null($this->backend)) {
+			return;
+		}
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		foreach ($books as $book) {
+			$this->backend->deleteAddressBook($book['id']);
+		}
+	}
+
+	public function testAddressBookOperations() {
+
+		// create a new address book
+		$this->backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+		$this->assertEquals('Example', $books[0]['{DAV:}displayname']);
+
+		// update it's display name
+		$patch = new PropPatch([
+			'{DAV:}displayname' => 'Unit test',
+			'{urn:ietf:params:xml:ns:carddav}addressbook-description' => 'Addressbook used for unit testing'
+		]);
+		$this->backend->updateAddressBook($books[0]['id'], $patch);
+		$patch->commit();
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+		$this->assertEquals('Unit test', $books[0]['{DAV:}displayname']);
+		$this->assertEquals('Addressbook used for unit testing', $books[0]['{urn:ietf:params:xml:ns:carddav}addressbook-description']);
+
+		// delete the address book
+		$this->backend->deleteAddressBook($books[0]['id']);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(0, count($books));
+	}
+
+	public function testAddressBookSharing() {
+
+		$this->backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+		$addressBook = new AddressBook($this->backend, $books[0]);
+		$this->backend->updateShares($addressBook, [
+			[
+				'href' => 'principal:' . self::UNIT_TEST_USER1,
+			],
+			[
+				'href' => 'principal:' . self::UNIT_TEST_GROUP,
+			]
+		], []);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER1);
+		$this->assertEquals(1, count($books));
+
+		// delete the address book
+		$this->backend->deleteAddressBook($books[0]['id']);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(0, count($books));
+	}
+
+	public function testCardOperations() {
+
+		/** @var CardDavBackend | \PHPUnit_Framework_MockObject_MockObject $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')
+				->setConstructorArgs([$this->db, $this->principal, null])
+				->setMethods(['updateProperties', 'purgeProperties'])->getMock();
+
+		// create a new address book
+		$backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+		$books = $backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+		$bookId = $books[0]['id'];
+
+		$uri = $this->getUniqueID('card');
+		// updateProperties is expected twice, once for createCard and once for updateCard
+		$backend->expects($this->at(0))->method('updateProperties')->with($bookId, $uri, '');
+		$backend->expects($this->at(1))->method('updateProperties')->with($bookId, $uri, '***');
+		// create a card
+		$backend->createCard($bookId, $uri, '');
+
+		// get all the cards
+		$cards = $backend->getCards($bookId);
+		$this->assertEquals(1, count($cards));
+		$this->assertEquals('', $cards[0]['carddata']);
+
+		// get the cards
+		$card = $backend->getCard($bookId, $uri);
+		$this->assertNotNull($card);
+		$this->assertArrayHasKey('id', $card);
+		$this->assertArrayHasKey('uri', $card);
+		$this->assertArrayHasKey('lastmodified', $card);
+		$this->assertArrayHasKey('etag', $card);
+		$this->assertArrayHasKey('size', $card);
+		$this->assertEquals('', $card['carddata']);
+
+		// update the card
+		$backend->updateCard($bookId, $uri, '***');
+		$card = $backend->getCard($bookId, $uri);
+		$this->assertEquals('***', $card['carddata']);
+
+		// delete the card
+		$backend->expects($this->once())->method('purgeProperties')->with($bookId, $card['id']);
+		$backend->deleteCard($bookId, $uri);
+		$cards = $backend->getCards($bookId);
+		$this->assertEquals(0, count($cards));
+	}
+
+	public function testMultiCard() {
+
+		$this->backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')
+			->setConstructorArgs([$this->db, $this->principal, null])
+			->setMethods(['updateProperties'])->getMock();
+
+		// create a new address book
+		$this->backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+		$bookId = $books[0]['id'];
+
+		// create a card
+		$uri0 = $this->getUniqueID('card');
+		$this->backend->createCard($bookId, $uri0, '');
+		$uri1 = $this->getUniqueID('card');
+		$this->backend->createCard($bookId, $uri1, '');
+		$uri2 = $this->getUniqueID('card');
+		$this->backend->createCard($bookId, $uri2, '');
+
+		// get all the cards
+		$cards = $this->backend->getCards($bookId);
+		$this->assertEquals(3, count($cards));
+		$this->assertEquals('', $cards[0]['carddata']);
+		$this->assertEquals('', $cards[1]['carddata']);
+		$this->assertEquals('', $cards[2]['carddata']);
+
+		// get the cards
+		$cards = $this->backend->getMultipleCards($bookId, [$uri1, $uri2]);
+		$this->assertEquals(2, count($cards));
+		foreach($cards as $card) {
+			$this->assertArrayHasKey('id', $card);
+			$this->assertArrayHasKey('uri', $card);
+			$this->assertArrayHasKey('lastmodified', $card);
+			$this->assertArrayHasKey('etag', $card);
+			$this->assertArrayHasKey('size', $card);
+			$this->assertEquals('', $card['carddata']);
+		}
+
+		// delete the card
+		$this->backend->deleteCard($bookId, $uri0);
+		$this->backend->deleteCard($bookId, $uri1);
+		$this->backend->deleteCard($bookId, $uri2);
+		$cards = $this->backend->getCards($bookId);
+		$this->assertEquals(0, count($cards));
+	}
+
+	public function testDeleteWithoutCard() {
+
+		$this->backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')
+			->setConstructorArgs([$this->db, $this->principal, null])
+			->setMethods([
+				'getCardId',
+				'addChange',
+				'purgeProperties',
+				'updateProperties',
+			])
+			->getMock();
+
+		// create a new address book
+		$this->backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+
+		$bookId = $books[0]['id'];
+		$uri = $this->getUniqueID('card');
+
+		// create a new address book
+		$this->backend->expects($this->once())
+			->method('getCardId')
+			->with($bookId, $uri)
+			->willThrowException(new \InvalidArgumentException());
+		$this->backend->expects($this->exactly(2))
+			->method('addChange')
+			->withConsecutive(
+				[$bookId, $uri, 1],
+				[$bookId, $uri, 3]
+			);
+		$this->backend->expects($this->never())
+			->method('purgeProperties');
+
+		// create a card
+		$this->backend->createCard($bookId, $uri, '');
+
+		// delete the card
+		$this->assertTrue($this->backend->deleteCard($bookId, $uri));
+	}
+
+	public function testSyncSupport() {
+
+		$this->backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')
+			->setConstructorArgs([$this->db, $this->principal, null])
+			->setMethods(['updateProperties'])->getMock();
+
+		// create a new address book
+		$this->backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+		$bookId = $books[0]['id'];
+
+		// fist call without synctoken
+		$changes = $this->backend->getChangesForAddressBook($bookId, '', 1);
+		$syncToken = $changes['syncToken'];
+
+		// add a change
+		$uri0 = $this->getUniqueID('card');
+		$this->backend->createCard($bookId, $uri0, '');
+
+		// look for changes
+		$changes = $this->backend->getChangesForAddressBook($bookId, $syncToken, 1);
+		$this->assertEquals($uri0, $changes['added'][0]);
+	}
+
+	public function testSharing() {
+		$this->backend->createAddressBook(self::UNIT_TEST_USER, 'Example', []);
+		$books = $this->backend->getAddressBooksForUser(self::UNIT_TEST_USER);
+		$this->assertEquals(1, count($books));
+
+		$exampleBook = new AddressBook($this->backend, $books[0]);
+		$this->backend->updateShares($exampleBook, [['href' => 'principal:principals/best-friend']], []);
+
+		$shares = $this->backend->getShares($exampleBook->getResourceId());
+		$this->assertEquals(1, count($shares));
+
+		// adding the same sharee again has no effect
+		$this->backend->updateShares($exampleBook, [['href' => 'principal:principals/best-friend']], []);
+
+		$shares = $this->backend->getShares($exampleBook->getResourceId());
+		$this->assertEquals(1, count($shares));
+
+		$books = $this->backend->getAddressBooksForUser('principals/best-friend');
+		$this->assertEquals(1, count($books));
+
+		$this->backend->updateShares($exampleBook, [], ['principal:principals/best-friend']);
+
+		$shares = $this->backend->getShares($exampleBook->getResourceId());
+		$this->assertEquals(0, count($shares));
+
+		$books = $this->backend->getAddressBooksForUser('principals/best-friend');
+		$this->assertEquals(0, count($books));
+	}
+
+	public function testUpdateProperties() {
+
+		$bookId = 42;
+		$cardUri = 'card-uri';
+		$cardId = 2;
+
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')
+			->setConstructorArgs([$this->db, $this->principal, null])
+			->setMethods(['getCardId'])->getMock();
+
+		$backend->expects($this->any())->method('getCardId')->willReturn($cardId);
+
+		// add properties for new vCard
+		$vCard = new VCard();
+		$vCard->add(new Text($vCard, 'UID', $cardUri));
+		$vCard->add(new Text($vCard, 'FN', 'John Doe'));
+		$this->invokePrivate($backend, 'updateProperties', [$bookId, $cardUri, $vCard->serialize()]);
+
+		$query = $this->db->getQueryBuilder();
+		$result = $query->select('*')->from('cards_properties')->execute()->fetchAll();
+
+		$this->assertSame(2, count($result));
+
+		$this->assertSame('UID', $result[0]['name']);
+		$this->assertSame($cardUri, $result[0]['value']);
+		$this->assertSame($bookId, (int)$result[0]['addressbookid']);
+		$this->assertSame($cardId, (int)$result[0]['cardid']);
+
+		$this->assertSame('FN', $result[1]['name']);
+		$this->assertSame('John Doe', $result[1]['value']);
+		$this->assertSame($bookId, (int)$result[1]['addressbookid']);
+		$this->assertSame($cardId, (int)$result[1]['cardid']);
+
+		// update properties for existing vCard
+		$vCard = new VCard();
+		$vCard->add(new Text($vCard, 'FN', 'John Doe'));
+		$this->invokePrivate($backend, 'updateProperties', [$bookId, $cardUri, $vCard->serialize()]);
+
+		$query = $this->db->getQueryBuilder();
+		$result = $query->select('*')->from('cards_properties')->execute()->fetchAll();
+
+		$this->assertSame(1, count($result));
+
+		$this->assertSame('FN', $result[0]['name']);
+		$this->assertSame('John Doe', $result[0]['value']);
+		$this->assertSame($bookId, (int)$result[0]['addressbookid']);
+		$this->assertSame($cardId, (int)$result[0]['cardid']);
+	}
+
+	public function testPurgeProperties() {
+
+		$query = $this->db->getQueryBuilder();
+		$query->insert('cards_properties')
+			->values(
+				[
+					'addressbookid' => $query->createNamedParameter(1),
+					'cardid' => $query->createNamedParameter(1),
+					'name' => $query->createNamedParameter('name1'),
+					'value' => $query->createNamedParameter('value1'),
+					'preferred' => $query->createNamedParameter(0)
+				]
+			);
+		$query->execute();
+
+		$query = $this->db->getQueryBuilder();
+		$query->insert('cards_properties')
+			->values(
+				[
+					'addressbookid' => $query->createNamedParameter(1),
+					'cardid' => $query->createNamedParameter(2),
+					'name' => $query->createNamedParameter('name2'),
+					'value' => $query->createNamedParameter('value2'),
+					'preferred' => $query->createNamedParameter(0)
+				]
+			);
+		$query->execute();
+
+		$this->invokePrivate($this->backend, 'purgeProperties', [1, 1]);
+
+		$query = $this->db->getQueryBuilder();
+		$result = $query->select('*')->from('cards_properties')->execute()->fetchAll();
+		$this->assertSame(1, count($result));
+		$this->assertSame(1 ,(int)$result[0]['addressbookid']);
+		$this->assertSame(2 ,(int)$result[0]['cardid']);
+
+	}
+
+	public function testGetCardId() {
+		$query = $this->db->getQueryBuilder();
+
+		$query->insert('cards')
+			->values(
+				[
+					'addressbookid' => $query->createNamedParameter(1),
+					'carddata' => $query->createNamedParameter(''),
+					'uri' => $query->createNamedParameter('uri'),
+					'lastmodified' => $query->createNamedParameter(4738743),
+					'etag' => $query->createNamedParameter('etag'),
+					'size' => $query->createNamedParameter(120)
+				]
+			);
+		$query->execute();
+		$id = $query->getLastInsertId();
+
+		$this->assertSame($id,
+			$this->invokePrivate($this->backend, 'getCardId', [1, 'uri']));
+	}
+
+	/**
+	 * @expectedException InvalidArgumentException
+	 */
+	public function testGetCardIdFailed() {
+		$this->invokePrivate($this->backend, 'getCardId', [1, 'uri']);
+	}
+
+	/**
+	 * @dataProvider dataTestSearch
+	 *
+	 * @param string $pattern
+	 * @param array $properties
+	 * @param array $expected
+	 */
+	public function testSearch($pattern, $properties, $expected) {
+		/** @var VCard $vCards */
+		$vCards = [];
+		$vCards[0] = new VCard();
+		$vCards[0]->add(new Text($vCards[0], 'UID', 'uid'));
+		$vCards[0]->add(new Text($vCards[0], 'FN', 'John Doe'));
+		$vCards[0]->add(new Text($vCards[0], 'CLOUD', 'john@owncloud.org'));
+		$vCards[1] = new VCard();
+		$vCards[1]->add(new Text($vCards[1], 'UID', 'uid'));
+		$vCards[1]->add(new Text($vCards[1], 'FN', 'John M. Doe'));
+
+		$vCardIds = [];
+		$query = $this->db->getQueryBuilder();
+		for($i=0; $i<2; $i++) {
+			$query->insert($this->dbCardsTable)
+					->values(
+							[
+									'addressbookid' => $query->createNamedParameter(0),
+									'carddata' => $query->createNamedParameter($vCards[$i]->serialize(), IQueryBuilder::PARAM_LOB),
+									'uri' => $query->createNamedParameter('uri' . $i),
+									'lastmodified' => $query->createNamedParameter(time()),
+									'etag' => $query->createNamedParameter('etag' . $i),
+									'size' => $query->createNamedParameter(120),
+							]
+					);
+			$query->execute();
+			$vCardIds[] = $query->getLastInsertId();
+		}
+
+		$query->insert($this->dbCardsPropertiesTable)
+			->values(
+				[
+					'addressbookid' => $query->createNamedParameter(0),
+					'cardid' => $query->createNamedParameter($vCardIds[0]),
+					'name' => $query->createNamedParameter('FN'),
+					'value' => $query->createNamedParameter('John Doe'),
+					'preferred' => $query->createNamedParameter(0)
+				]
+			);
+		$query->execute();
+		$query->insert($this->dbCardsPropertiesTable)
+				->values(
+						[
+								'addressbookid' => $query->createNamedParameter(0),
+								'cardid' => $query->createNamedParameter($vCardIds[0]),
+								'name' => $query->createNamedParameter('CLOUD'),
+								'value' => $query->createNamedParameter('John@owncloud.org'),
+								'preferred' => $query->createNamedParameter(0)
+						]
+				);
+		$query->execute();
+		$query->insert($this->dbCardsPropertiesTable)
+			->values(
+				[
+					'addressbookid' => $query->createNamedParameter(0),
+					'cardid' => $query->createNamedParameter($vCardIds[1]),
+					'name' => $query->createNamedParameter('FN'),
+					'value' => $query->createNamedParameter('John M. Doe'),
+					'preferred' => $query->createNamedParameter(0)
+				]
+			);
+		$query->execute();
+
+		$result = $this->backend->search(0, $pattern, $properties);
+
+		// check result
+		$this->assertSame(count($expected), count($result));
+		$found = [];
+		foreach ($result as $r) {
+			foreach ($expected as $exp) {
+				if (strpos($r, $exp) > 0) {
+					$found[$exp] = true;
+					break;
+				}
+			}
+		}
+
+		$this->assertSame(count($expected), count($found));
+	}
+
+	public function dataTestSearch() {
+		return [
+				['John', ['FN'], ['John Doe', 'John M. Doe']],
+				['M. Doe', ['FN'], ['John M. Doe']],
+				['Do', ['FN'], ['John Doe', 'John M. Doe']],
+				'check if duplicates are handled correctly' => ['John', ['FN', 'CLOUD'], ['John Doe', 'John M. Doe']],
+				'case insensitive' => ['john', ['FN'], ['John Doe', 'John M. Doe']]
+		];
+	}
+
+	public function testGetCardUri() {
+		$query = $this->db->getQueryBuilder();
+		$query->insert($this->dbCardsTable)
+				->values(
+						[
+								'addressbookid' => $query->createNamedParameter(1),
+								'carddata' => $query->createNamedParameter('carddata', IQueryBuilder::PARAM_LOB),
+								'uri' => $query->createNamedParameter('uri'),
+								'lastmodified' => $query->createNamedParameter(5489543),
+								'etag' => $query->createNamedParameter('etag'),
+								'size' => $query->createNamedParameter(120),
+						]
+				);
+		$query->execute();
+
+		$id = $query->getLastInsertId();
+
+		$this->assertSame('uri', $this->backend->getCardUri($id));
+	}
+
+	/**
+	 * @expectedException InvalidArgumentException
+	 */
+	public function testGetCardUriFailed() {
+		$this->backend->getCardUri(1);
+	}
+
+	public function testGetContact() {
+		$query = $this->db->getQueryBuilder();
+		for($i=0; $i<2; $i++) {
+			$query->insert($this->dbCardsTable)
+					->values(
+							[
+									'addressbookid' => $query->createNamedParameter($i),
+									'carddata' => $query->createNamedParameter('carddata' . $i, IQueryBuilder::PARAM_LOB),
+									'uri' => $query->createNamedParameter('uri' . $i),
+									'lastmodified' => $query->createNamedParameter(5489543),
+									'etag' => $query->createNamedParameter('etag' . $i),
+									'size' => $query->createNamedParameter(120),
+							]
+					);
+			$query->execute();
+		}
+
+		$result = $this->backend->getContact(0, 'uri0');
+		$this->assertSame(7, count($result));
+		$this->assertSame(0, (int)$result['addressbookid']);
+		$this->assertSame('uri0', $result['uri']);
+		$this->assertSame(5489543, (int)$result['lastmodified']);
+		$this->assertSame('etag0', $result['etag']);
+		$this->assertSame(120, (int)$result['size']);
+	}
+
+	public function testGetContactFail() {
+		$this->assertEmpty($this->backend->getContact(0, 'uri'));
+	}
+
+	public function testCollectCardProperties() {
+		$query = $this->db->getQueryBuilder();
+		$query->insert($this->dbCardsPropertiesTable)
+			->values(
+				[
+					'addressbookid' => $query->createNamedParameter(666),
+					'cardid' => $query->createNamedParameter(777),
+					'name' => $query->createNamedParameter('FN'),
+					'value' => $query->createNamedParameter('John Doe'),
+					'preferred' => $query->createNamedParameter(0)
+				]
+			)
+		->execute();
+
+		$result = $this->backend->collectCardProperties(666, 'FN');
+		$this->assertEquals(['John Doe'], $result);
+	}
+}
diff --git a/apps/dav/tests/unit/CardDAV/ContactsManagerTest.php b/apps/dav/tests/unit/CardDAV/ContactsManagerTest.php
new file mode 100644
index 00000000000..775dc5d18a5
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/ContactsManagerTest.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+use OCA\DAV\CardDAV\CardDavBackend;
+use OCA\DAV\CardDAV\ContactsManager;
+use OCP\Contacts\IManager;
+use Test\TestCase;
+
+class ContactsManagerTest extends TestCase {
+	public function test() {
+		/** @var IManager | \PHPUnit_Framework_MockObject_MockObject $cm */
+		$cm = $this->getMockBuilder('OCP\Contacts\IManager')->disableOriginalConstructor()->getMock();
+		$cm->expects($this->exactly(2))->method('registerAddressBook');
+		/** @var CardDavBackend | \PHPUnit_Framework_MockObject_MockObject $backEnd */
+		$backEnd = $this->getMockBuilder('OCA\DAV\CardDAV\CardDavBackend')->disableOriginalConstructor()->getMock();
+		$backEnd->method('getAddressBooksForUser')->willReturn([
+				[]
+			]);
+
+		$app = new ContactsManager($backEnd);
+		$app->setupContactsProvider($cm, 'user01');
+	}
+}
diff --git a/apps/dav/tests/unit/CardDAV/ConverterTest.php b/apps/dav/tests/unit/CardDAV/ConverterTest.php
new file mode 100644
index 00000000000..4b71d43cc43
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/ConverterTest.php
@@ -0,0 +1,137 @@
+<?php
+/**
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+use OCA\DAV\CardDAV\Converter;
+use Test\TestCase;
+
+class ConverterTest extends  TestCase {
+
+	/**
+	 * @dataProvider providesNewUsers
+	 */
+	public function testCreation($expectedVCard, $displayName = null, $eMailAddress = null, $cloudId = null) {
+		$user = $this->getUserMock($displayName, $eMailAddress, $cloudId);
+
+		$converter = new Converter();
+		$vCard = $converter->createCardFromUser($user);
+		$cardData = $vCard->serialize();
+
+		$this->assertEquals($expectedVCard, $cardData);
+	}
+
+	public function providesNewUsers() {
+		return [
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nPHOTO;ENCODING=b;TYPE=JPEG:MTIzNDU2Nzg5\r\nEND:VCARD\r\n"],
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:Dr. Foo Bar\r\nN:Bar;Dr.;Foo;;\r\nPHOTO;ENCODING=b;TYPE=JPEG:MTIzNDU2Nzg5\r\nEND:VCARD\r\n", "Dr. Foo Bar"],
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:Dr. Foo Bar\r\nN:Bar;Dr.;Foo;;\r\nEMAIL;TYPE=OTHER:foo@bar.net\r\nPHOTO;ENCODING=b;TYPE=JPEG:MTIzNDU2Nzg5\r\nEND:VCARD\r\n", "Dr. Foo Bar", "foo@bar.net"],
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:Dr. Foo Bar\r\nN:Bar;Dr.;Foo;;\r\nCLOUD:foo@bar.net\r\nPHOTO;ENCODING=b;TYPE=JPEG:MTIzNDU2Nzg5\r\nEND:VCARD\r\n", "Dr. Foo Bar", null, "foo@bar.net"],
+		];
+	}
+
+	/**
+	 * @dataProvider providesNewUsers
+	 */
+	public function testUpdateOfUnchangedUser($expectedVCard, $displayName = null, $eMailAddress = null, $cloudId = null) {
+		$user = $this->getUserMock($displayName, $eMailAddress, $cloudId);
+
+		$converter = new Converter();
+		$vCard = $converter->createCardFromUser($user);
+		$updated = $converter->updateCard($vCard, $user);
+		$this->assertFalse($updated);
+		$cardData = $vCard->serialize();
+
+		$this->assertEquals($expectedVCard, $cardData);
+	}
+
+	/**
+	 * @dataProvider providesUsersForUpdateOfRemovedElement
+	 */
+	public function testUpdateOfRemovedElement($expectedVCard, $displayName = null, $eMailAddress = null, $cloudId = null) {
+		$user = $this->getUserMock($displayName, $eMailAddress, $cloudId);
+
+		$converter = new Converter();
+		$vCard = $converter->createCardFromUser($user);
+
+		$user1 = $this->getMockBuilder('OCP\IUser')->disableOriginalConstructor()->getMock();
+		$user1->method('getUID')->willReturn('12345');
+		$user1->method('getDisplayName')->willReturn(null);
+		$user1->method('getEMailAddress')->willReturn(null);
+		$user1->method('getCloudId')->willReturn(null);
+		$user1->method('getAvatarImage')->willReturn(null);
+
+		$updated = $converter->updateCard($vCard, $user1);
+		$this->assertTrue($updated);
+		$cardData = $vCard->serialize();
+
+		$this->assertEquals($expectedVCard, $cardData);
+	}
+
+	public function providesUsersForUpdateOfRemovedElement() {
+		return [
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nEND:VCARD\r\n", "Dr. Foo Bar"],
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nEND:VCARD\r\n", "Dr. Foo Bar", "foo@bar.net"],
+				["BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.5.0//EN\r\nUID:12345\r\nFN:12345\r\nN:12345;;;;\r\nEND:VCARD\r\n", "Dr. Foo Bar", null, "foo@bar.net"],
+		];
+	}
+
+	/**
+	 * @dataProvider providesNames
+	 * @param $expected
+	 * @param $fullName
+	 */
+	public function testNameSplitter($expected, $fullName) {
+
+		$converter = new Converter();
+		$r = $converter->splitFullName($fullName);
+		$r = implode(';', $r);
+		$this->assertEquals($expected, $r);
+	}
+
+	public function providesNames() {
+		return [
+				['Sauron;;;;', 'Sauron'],
+				['Baggins;Bilbo;;;', 'Bilbo Baggins'],
+				['Tolkien;John;Ronald Reuel;;', 'John Ronald Reuel Tolkien'],
+		];
+	}
+
+	/**
+	 * @param $displayName
+	 * @param $eMailAddress
+	 * @param $cloudId
+	 * @return \PHPUnit_Framework_MockObject_MockObject
+	 */
+	protected function getUserMock($displayName, $eMailAddress, $cloudId) {
+		$image0 = $this->getMockBuilder('OCP\IImage')->disableOriginalConstructor()->getMock();
+		$image0->method('mimeType')->willReturn('JPEG');
+		$image0->method('data')->willReturn('123456789');
+		$user = $this->getMockBuilder('OCP\IUser')->disableOriginalConstructor()->getMock();
+		$user->method('getUID')->willReturn('12345');
+		$user->method('getDisplayName')->willReturn($displayName);
+		$user->method('getEMailAddress')->willReturn($eMailAddress);
+		$user->method('getCloudId')->willReturn($cloudId);
+		$user->method('getAvatarImage')->willReturn($image0);
+		return $user;
+	}
+}
diff --git a/apps/dav/tests/unit/CardDAV/Sharing/PluginTest.php b/apps/dav/tests/unit/CardDAV/Sharing/PluginTest.php
new file mode 100644
index 00000000000..1cbececdb33
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/Sharing/PluginTest.php
@@ -0,0 +1,81 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV\Sharing;
+
+
+use OCA\DAV\DAV\Sharing\IShareable;
+use OCA\DAV\DAV\Sharing\Plugin;
+use OCA\DAV\Connector\Sabre\Auth;
+use OCP\IRequest;
+use Sabre\DAV\Server;
+use Sabre\DAV\SimpleCollection;
+use Sabre\HTTP\Request;
+use Sabre\HTTP\Response;
+use Test\TestCase;
+
+class PluginTest extends TestCase {
+
+	/** @var Plugin */
+	private $plugin;
+	/** @var Server */
+	private $server;
+	/** @var IShareable | \PHPUnit_Framework_MockObject_MockObject */
+	private $book;
+
+	public function setUp() {
+		parent::setUp();
+		
+		/** @var Auth | \PHPUnit_Framework_MockObject_MockObject $authBackend */
+		$authBackend = $this->getMockBuilder('OCA\DAV\Connector\Sabre\Auth')->disableOriginalConstructor()->getMock();
+		$authBackend->method('isDavAuthenticated')->willReturn(true);
+
+		/** @var IRequest $request */
+		$request = $this->getMockBuilder('OCP\IRequest')->disableOriginalConstructor()->getMock();
+		$this->plugin = new Plugin($authBackend, $request);
+
+		$root = new SimpleCollection('root');
+		$this->server = new \Sabre\DAV\Server($root);
+		/** @var SimpleCollection $node */
+		$this->book = $this->getMockBuilder('OCA\DAV\DAV\Sharing\IShareable')->disableOriginalConstructor()->getMock();
+		$this->book->method('getName')->willReturn('addressbook1.vcf');
+		$root->addChild($this->book);
+		$this->plugin->initialize($this->server);
+	}
+
+	public function testSharing() {
+
+		$this->book->expects($this->once())->method('updateShares')->with([[
+				'href' => 'principal:principals/admin',
+				'commonName' => null,
+				'summary' => null,
+				'readOnly' => false
+		]], ['mailto:wilfredo@example.com']);
+
+		// setup request
+		$request = new Request();
+		$request->addHeader('Content-Type', 'application/xml');
+		$request->setUrl('addressbook1.vcf');
+		$request->setBody('<?xml version="1.0" encoding="utf-8" ?><CS:share xmlns:D="DAV:" xmlns:CS="http://owncloud.org/ns"><CS:set><D:href>principal:principals/admin</D:href><CS:read-write/></CS:set> <CS:remove><D:href>mailto:wilfredo@example.com</D:href></CS:remove></CS:share>');
+		$response = new Response();
+		$this->plugin->httpPost($request, $response);
+	}
+}
diff --git a/apps/dav/tests/unit/CardDAV/SyncServiceTest.php b/apps/dav/tests/unit/CardDAV/SyncServiceTest.php
new file mode 100644
index 00000000000..e5a2603c77a
--- /dev/null
+++ b/apps/dav/tests/unit/CardDAV/SyncServiceTest.php
@@ -0,0 +1,145 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\Tests\unit\CardDAV;
+
+use OCA\DAV\CardDAV\CardDavBackend;
+use OCA\DAV\CardDAV\SyncService;
+use OCP\IUser;
+use OCP\IUserManager;
+use Test\TestCase;
+
+class SyncServiceTest extends TestCase {
+	public function testEmptySync() {
+		$backend = $this->getBackendMock(0, 0, 0);
+
+		$ss = $this->getSyncServiceMock($backend, []);
+		$return = $ss->syncRemoteAddressBook('', 'system', '1234567890', null, '1', 'principals/system/system', []);
+		$this->assertEquals('sync-token-1', $return);
+	}
+
+	public function testSyncWithNewElement() {
+		$backend = $this->getBackendMock(1, 0, 0);
+		$backend->method('getCard')->willReturn(false);
+
+		$ss = $this->getSyncServiceMock($backend, ['0' => [200 => '']]);
+		$return = $ss->syncRemoteAddressBook('', 'system', '1234567890', null, '1', 'principals/system/system', []);
+		$this->assertEquals('sync-token-1', $return);
+	}
+
+	public function testSyncWithUpdatedElement() {
+		$backend = $this->getBackendMock(0, 1, 0);
+		$backend->method('getCard')->willReturn(true);
+
+		$ss = $this->getSyncServiceMock($backend, ['0' => [200 => '']]);
+		$return = $ss->syncRemoteAddressBook('', 'system', '1234567890', null, '1', 'principals/system/system', []);
+		$this->assertEquals('sync-token-1', $return);
+	}
+
+	public function testSyncWithDeletedElement() {
+		$backend = $this->getBackendMock(0, 0, 1);
+
+		$ss = $this->getSyncServiceMock($backend, ['0' => [404 => '']]);
+		$return = $ss->syncRemoteAddressBook('', 'system', '1234567890', null, '1', 'principals/system/system', []);
+		$this->assertEquals('sync-token-1', $return);
+	}
+
+	public function testEnsureSystemAddressBookExists() {
+		/** @var CardDavBackend | \PHPUnit_Framework_MockObject_MockObject $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDAVBackend')->disableOriginalConstructor()->getMock();
+		$backend->expects($this->exactly(1))->method('createAddressBook');
+		$backend->expects($this->at(0))->method('getAddressBooksByUri')->willReturn(null);
+		$backend->expects($this->at(1))->method('getAddressBooksByUri')->willReturn([]);
+
+		/** @var IUserManager $userManager */
+		$userManager = $this->getMockBuilder('OCP\IUserManager')->disableOriginalConstructor()->getMock();
+		$logger = $this->getMockBuilder('OCP\ILogger')->disableOriginalConstructor()->getMock();
+		$ss = new SyncService($backend, $userManager, $logger);
+		$book = $ss->ensureSystemAddressBookExists('principals/users/adam', 'contacts', []);
+	}
+
+	public function testUpdateAndDeleteUser() {
+		/** @var CardDavBackend | \PHPUnit_Framework_MockObject_MockObject $backend */
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDAVBackend')->disableOriginalConstructor()->getMock();
+		$logger = $this->getMockBuilder('OCP\ILogger')->disableOriginalConstructor()->getMock();
+
+		$backend->expects($this->once())->method('createCard');
+		$backend->expects($this->once())->method('updateCard');
+		$backend->expects($this->once())->method('deleteCard');
+
+		$backend->method('getCard')->willReturnOnConsecutiveCalls(false, [
+			'carddata' => "BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 3.4.8//EN\r\nUID:test-user\r\nFN:test-user\r\nN:test-user;;;;\r\nEND:VCARD\r\n\r\n"
+		]);
+
+		/** @var IUserManager | \PHPUnit_Framework_MockObject_MockObject $userManager */
+		$userManager = $this->getMockBuilder('OCP\IUserManager')->disableOriginalConstructor()->getMock();
+
+		/** @var IUser | \PHPUnit_Framework_MockObject_MockObject $user */
+		$user = $this->getMockBuilder('OCP\IUser')->disableOriginalConstructor()->getMock();
+		$user->method('getBackendClassName')->willReturn('unittest');
+		$user->method('getUID')->willReturn('test-user');
+
+		$ss = new SyncService($backend, $userManager, $logger);
+		$ss->updateUser($user);
+
+		$user->method('getDisplayName')->willReturn('A test user for unit testing');
+
+		$ss->updateUser($user);
+
+		$ss->deleteUser($user);
+	}
+
+	/**
+	 * @param int $createCount
+	 * @param int $updateCount
+	 * @param int $deleteCount
+	 * @return \PHPUnit_Framework_MockObject_MockObject
+	 */
+	private function getBackendMock($createCount, $updateCount, $deleteCount) {
+		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDAVBackend')->disableOriginalConstructor()->getMock();
+		$backend->expects($this->exactly($createCount))->method('createCard');
+		$backend->expects($this->exactly($updateCount))->method('updateCard');
+		$backend->expects($this->exactly($deleteCount))->method('deleteCard');
+		return $backend;
+	}
+
+	/**
+	 * @param $backend
+	 * @param $response
+	 * @return SyncService|\PHPUnit_Framework_MockObject_MockObject
+	 */
+	private function getSyncServiceMock($backend, $response) {
+		$userManager = $this->getMockBuilder('OCP\IUserManager')->disableOriginalConstructor()->getMock();
+		$logger = $this->getMockBuilder('OCP\ILogger')->disableOriginalConstructor()->getMock();
+		/** @var SyncService | \PHPUnit_Framework_MockObject_MockObject $ss */
+		$ss = $this->getMock('OCA\DAV\CardDAV\SyncService', ['ensureSystemAddressBookExists', 'requestSyncReport', 'download'], [$backend, $userManager, $logger]);
+		$ss->method('requestSyncReport')->withAnyParameters()->willReturn(['response' => $response, 'token' => 'sync-token-1']);
+		$ss->method('ensureSystemAddressBookExists')->willReturn(['id' => 1]);
+		$ss->method('download')->willReturn([
+			'body' => '',
+			'statusCode' => 200,
+			'headers' => []
+		]);
+		return $ss;
+	}
+
+}