Fix tests

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

tests/unit/Service/StackServiceTest.php

@@ -35,6 +35,7 @@ use OCA\Deck\Db\Label;
 use OCA\Deck\Db\LabelMapper;
 use OCA\Deck\Db\Stack;
 use OCA\Deck\Db\StackMapper;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use \Test\TestCase;
 
 /**
@@ -69,6 +70,8 @@ class StackServiceTest extends TestCase {
 	private $activityManager;
 	/** @var ChangeHelper|\PHPUnit\Framework\MockObject\MockObject */
 	private $changeHelper;
+	/** @var EventDispatcherInterface */
+	private $eventDispatcher;
 
 	public function setUp() {
 		parent::setUp();
@@ -83,6 +86,7 @@ class StackServiceTest extends TestCase {
 		$this->labelMapper = $this->createMock(LabelMapper::class);
 		$this->activityManager = $this->createMock(ActivityManager::class);
 		$this->changeHelper = $this->createMock(ChangeHelper::class);
+		$this->eventDispatcher = $this->createMock(EventDispatcherInterface::class);
 
 		$this->stackService = new StackService(
 			$this->stackMapper,
@@ -95,6 +99,7 @@ class StackServiceTest extends TestCase {
 			$this->assignedUsersMapper,
 			$this->attachmentService,
 			$this->activityManager,
+			$this->eventDispatcher,
 			$this->changeHelper
 		);
 	}