Adapt test to also run isolated

Signed-off-by: Julius Härtl <jus@bitgrid.net>

apps/dav/tests/unit/Connector/Sabre/DirectoryTest.php

@@ -34,6 +34,7 @@
 use OCA\DAV\Connector\Sabre\Directory;
 use OCP\Files\ForbiddenException;
 use OCP\Files\Mount\IMountPoint;
+use Test\Traits\UserTrait;
 
 class TestViewDirectory extends \OC\Files\View {
 	private $updatables;
@@ -73,6 +74,8 @@ public function getRelativePath($path) {
  */
 class DirectoryTest extends \Test\TestCase {
 
+	use UserTrait;
+
 	/** @var \OC\Files\View | \PHPUnit\Framework\MockObject\MockObject */
 	private $view;
 	/** @var \OC\Files\FileInfo | \PHPUnit\Framework\MockObject\MockObject */
@@ -274,6 +277,8 @@ public function testGetChildThrowInvalidPath() {
 	}
 
 	public function testGetQuotaInfoUnlimited() {
+		self::createUser('user', 'password');
+		self::loginAsUser('user');
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$storage = $this->getMockBuilder(Quota::class)
 			->disableOriginalConstructor()
@@ -315,6 +320,8 @@ public function testGetQuotaInfoUnlimited() {
 	}
 
 	public function testGetQuotaInfoSpecific() {
+		self::createUser('user', 'password');
+		self::loginAsUser('user');
 		$mountPoint = $this->createMock(IMountPoint::class);
 		$storage = $this->getMockBuilder(Quota::class)
 			->disableOriginalConstructor()