Ignore NoUserException for shares from ghosts

Add unit tests for FailedStorage init from SharedStorage

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

apps/files_sharing/lib/SharedStorage.php

@@ -32,15 +32,14 @@
 namespace OCA\Files_Sharing;
 
 use OC\Files\Filesystem;
-use OC\Files\Cache\FailedCache;
 use OC\Files\Storage\Wrapper\PermissionsMask;
-use OCA\Files_Sharing\ISharedStorage;
 use OC\Files\Storage\FailedStorage;
 use OCP\Constants;
 use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\NotFoundException;
 use OCP\Files\Storage\IStorage;
 use OCP\Lock\ILockingProvider;
+use OC\User\NoUserException;
 
 /**
  * Convert target path to source path and pass the function call to the correct storage provider
@@ -121,6 +120,11 @@ class SharedStorage extends \OC\Files\Storage\Wrapper\Jail implements ISharedSto
 				'mask' => $this->superShare->getPermissions()
 			]);
 		} catch (NotFoundException $e) {
+			// original file not accessible or deleted, set FailedStorage
+			$this->storage = new FailedStorage(['exception' => $e]);
+			$this->rootPath = '';
+		} catch (NoUserException $e) {
+			// sharer user deleted, set FailedStorage
 			$this->storage = new FailedStorage(['exception' => $e]);
 			$this->rootPath = '';
 		} catch (\Exception $e) {

apps/files_sharing/tests/SharedStorageTest.php

@@ -28,6 +28,11 @@
 
 namespace OCA\Files_Sharing\Tests;
 
+use OCA\Files_Sharing\SharedStorage;
+use OCP\Share\IShare;
+use OC\Files\View;
+use OCP\Files\NotFoundException;
+
 /**
  * Class SharedStorageTest
  *
@@ -559,4 +564,37 @@ class SharedStorageTest extends TestCase {
 		$this->shareManager->deleteShare($share);
 
 	}
+
+	public function testInitWithNonExistingUser() {
+		$share = $this->createMock(IShare::class);
+		$share->method('getShareOwner')->willReturn('unexist');
+		$ownerView = $this->createMock(View::class);
+		$storage = new SharedStorage([
+			'ownerView' => $ownerView,
+			'superShare' => $share,
+			'groupedShares' => [$share],
+			'user' => 'user1',
+		]);
+
+		// trigger init
+		$this->assertInstanceOf(\OC\Files\Cache\FailedCache::class, $storage->getCache());
+		$this->assertInstanceOf(\OC\Files\Storage\FailedStorage::class, $storage->getSourceStorage());
+	}
+
+	public function testInitWithNotFoundSource() {
+		$share = $this->createMock(IShare::class);
+		$share->method('getShareOwner')->willReturn(self::TEST_FILES_SHARING_API_USER1);
+		$ownerView = $this->createMock(View::class);
+		$ownerView->method('getPath')->will($this->throwException(new NotFoundException()));
+		$storage = new SharedStorage([
+			'ownerView' => $ownerView,
+			'superShare' => $share,
+			'groupedShares' => [$share],
+			'user' => 'user1',
+		]);
+
+		// trigger init
+		$this->assertInstanceOf(\OC\Files\Cache\FailedCache::class, $storage->getCache());
+		$this->assertInstanceOf(\OC\Files\Storage\FailedStorage::class, $storage->getSourceStorage());
+	}
 }