refactor(result): Adapt tests to new result methods

Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>

apps/dav/tests/unit/Controller/InvitationResponseControllerTest.php

@@ -422,7 +422,7 @@ EOF;
 
 		$stmt->expects($this->once())
 			->method('fetchAssociative')
-			->willReturn($return);
+			->willReturn($return ?? false);
 		$stmt->expects($this->once())
 			->method('closeCursor');
 

apps/dav/tests/unit/Migration/RefreshWebcalJobRegistrarTest.php

@@ -58,8 +58,7 @@ class RefreshWebcalJobRegistrarTest extends TestCase {
 			->willReturn($statement);
 
 		$statement->expects($this->exactly(4))
-			->method('fetch')
-			->with(\PDO::FETCH_ASSOC)
+			->method('fetchAssociative')
 			->willReturnOnConsecutiveCalls(
 				[
 					'principaluri' => 'foo1',
@@ -73,7 +72,7 @@ class RefreshWebcalJobRegistrarTest extends TestCase {
 					'principaluri' => 'foo3',
 					'uri' => 'bar3',
 				],
-				null
+				false,
 			);
 
 		$this->jobList->expects($this->exactly(3))

apps/dav/tests/unit/Migration/RemoveDeletedUsersCalendarSubscriptionsTest.php

@@ -80,7 +80,7 @@ class RemoveDeletedUsersCalendarSubscriptionsTest extends TestCase {
 			->willReturn(count($subscriptions));
 
 		$result
-			->method('fetch')
+			->method('fetchAssociative')
 			->willReturnOnConsecutiveCalls(...$subscriptions);
 
 		$qb->method('delete')