Fixed unit tests for files sharing watcher

apps/files_sharing/tests/base.php

@@ -29,7 +29,7 @@ use OCA\Files\Share;
  *
  * Base class for sharing tests.
  */
-class Test_Files_Sharing_Base extends \PHPUnit_Framework_TestCase {
+abstract class Test_Files_Sharing_Base extends \PHPUnit_Framework_TestCase {
 
 	const TEST_FILES_SHARING_API_USER1 = "test-share-user1";
 	const TEST_FILES_SHARING_API_USER2 = "test-share-user2";

apps/files_sharing/tests/watcher.php

@@ -55,12 +55,12 @@ class Test_Files_Sharing_Watcher extends Test_Files_Sharing_Base {
 	function tearDown() {
 		$this->sharedCache->clear();
 
+		self::loginHelper(self::TEST_FILES_SHARING_API_USER1);
+
 		$fileinfo = $this->view->getFileInfo('container/shareddir');
 		\OCP\Share::unshare('folder', $fileinfo['fileid'], \OCP\Share::SHARE_TYPE_USER,
 			self::TEST_FILES_SHARING_API_USER2);
 
-		self::loginHelper(self::TEST_FILES_SHARING_API_USER1);
-
 		$this->view->deleteAll('container');
 
 		$this->ownerCache->clear();