diff --git a/tests/lib/Share20/ShareHelperTests.php b/tests/lib/Share20/ShareHelperTests.php
new file mode 100644
index 0000000000..b6c737cf44
--- /dev/null
+++ b/tests/lib/Share20/ShareHelperTests.php
@@ -0,0 +1,94 @@
+<?php
+/**
+ * @copyright 2017, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace Test\Share20;
+
+use OC\Share20\ShareHelper;
+use OCP\Files\Folder;
+use OCP\Files\IRootFolder;
+use OCP\Files\Node;
+use OCP\Files\NotFoundException;
+use Test\TestCase;
+
+class ShareHelperTests extends TestCase {
+
+	/** @var IRootFolder|\PHPUnit_Framework_MockObject_MockObject */
+	private $rootFolder;
+
+	/** @var ShareHelper */
+	private $helper;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->rootFolder = $this->createMock(IRootFolder::class);
+
+		$this->helper = new ShareHelper($this->rootFolder);
+	}
+
+	/**
+	 * uid1 - Exists with valid node
+	 * uid2 - Does not exist
+	 * uid3 - Exists but no valid node
+	 * uid4 - Exists with valid node
+	 */
+	public function testGetPathsForAccessList() {
+		/** @var Folder[]|\PHPUnit_Framework_MockObject_MockObject[] $userFolder */
+		$userFolder = [
+			'uid1' => $this->createMock(Folder::class),
+			'uid3' => $this->createMock(Folder::class),
+			'uid4' => $this->createMock(Folder::class),
+		];
+
+		$this->rootFolder->method('getUserFolder')
+			->willReturnCallback(function($uid) use ($userFolder) {
+				if (isset($userFolder[$uid])) {
+					return $userFolder[$uid];
+				}
+				throw new NotFoundException();
+			});
+
+		/** @var Node|\PHPUnit_Framework_MockObject_MockObject $node */
+		$node = $this->createMock(Node::class);
+		$node->method('getId')
+			->willReturn(42);
+
+		$userFolder['uid1']->method('getById')
+			->with(42)
+			->willReturn([$node]);
+		$userFolder['uid3']->method('getById')
+			->with(42)
+			->willReturn([]);
+		$userFolder['uid4']->method('getById')
+			->with(42)
+			->willReturn([$node]);
+
+		$expects = [
+			'uid1' => [$node],
+			'uid4' => [$node],
+		];
+
+		$result = $this->helper->getPathsForAccessList($node, ['uid1', 'uid2', 'uid3', 'uid4']);
+
+		$this->assertSame($expects, $result);
+	}
+}