test: add unit test for upload RootCollection

Assisted-by: Claude:claude-sonnet-5
Signed-off-by: Salvatore Martire <4652631+salmart-dev@users.noreply.github.com>

Author: salmart-dev

apps/dav/tests/unit/Upload/RootCollectionTest.php

@@ -0,0 +1,95 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\DAV\Tests\unit\Upload;
+
+use OCA\DAV\Upload\CleanupService;
+use OCA\DAV\Upload\RootCollection;
+use OCA\DAV\Upload\UploadHome;
+use OCP\Files\IRootFolder;
+use OCP\IUser;
+use OCP\IUserSession;
+use OCP\Share\IManager as IShareManager;
+use OCP\Share\IShare;
+use PHPUnit\Framework\MockObject\MockObject;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAVACL\PrincipalBackend\BackendInterface;
+use Test\TestCase;
+
+class RootCollectionTest extends TestCase {
+	private BackendInterface&MockObject $principalBackend;
+	private CleanupService&MockObject $cleanupService;
+	private IRootFolder&MockObject $rootFolder;
+	private IUserSession&MockObject $userSession;
+	private IShareManager&MockObject $shareManager;
+	private RootCollection $collection;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->principalBackend = $this->createMock(BackendInterface::class);
+		$this->cleanupService = $this->createMock(CleanupService::class);
+		$this->rootFolder = $this->createMock(IRootFolder::class);
+		$this->userSession = $this->createMock(IUserSession::class);
+		$this->shareManager = $this->createMock(IShareManager::class);
+
+		$this->collection = new RootCollection(
+			$this->principalBackend,
+			'principals/users',
+			$this->cleanupService,
+			$this->rootFolder,
+			$this->userSession,
+			$this->shareManager,
+		);
+	}
+
+	private function mockUser(string $uid): IUser&MockObject {
+		$user = $this->createMock(IUser::class);
+		$user->method('getUID')->willReturn($uid);
+		return $user;
+	}
+
+	public function testGetChildForPrincipalReturnsUploadHomeForOwnPrincipal(): void {
+		$this->userSession->method('getUser')->willReturn($this->mockUser('alice'));
+
+		$node = $this->collection->getChildForPrincipal(['uri' => 'principals/users/alice']);
+
+		$this->assertInstanceOf(UploadHome::class, $node);
+	}
+
+	public function testGetChildForPrincipalReturnsUploadHomeForShareToken(): void {
+		$this->userSession->method('getUser')->willReturn($this->mockUser('alice'));
+
+		$share = $this->createMock(IShare::class);
+		$share->method('getShareOwner')->willReturn('bob');
+		$this->shareManager->method('getShareByToken')
+			->with('sometoken')
+			->willReturn($share);
+
+		$node = $this->collection->getChildForPrincipal(['uri' => 'principals/shares/sometoken']);
+
+		$this->assertInstanceOf(UploadHome::class, $node);
+	}
+
+	public function testGetChildForPrincipalThrowsWhenPrincipalDoesNotMatchUser(): void {
+		$this->userSession->method('getUser')->willReturn($this->mockUser('alice'));
+
+		$this->expectException(Forbidden::class);
+
+		$this->collection->getChildForPrincipal(['uri' => 'principals/users/bob']);
+	}
+
+	public function testGetChildForPrincipalThrowsWhenNotLoggedIn(): void {
+		$this->userSession->method('getUser')->willReturn(null);
+
+		$this->expectException(Forbidden::class);
+
+		$this->collection->getChildForPrincipal(['uri' => 'principals/users/alice']);
+	}
+}