add unit tests

tests/lib/files/storage/copydirectory.php

+<?php
+/**
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace Test\Files\Storage;
+
+use OC\Files\Storage\Temporary;
+
+class StorageNoRecursiveCopy extends Temporary {
+	public function copy($path1, $path2) {
+		if ($this->is_dir($path1)) {
+			return false;
+		}
+		return copy($this->getSourcePath($path1), $this->getSourcePath($path2));
+	}
+}
+
+class CopyDirectoryStorage extends StorageNoRecursiveCopy {
+	use \OC\Files\Storage\PolyFill\CopyDirectory;
+}
+
+class CopyDirectory extends Storage {
+
+	protected function setUp() {
+		parent::setUp();
+		$this->instance = new CopyDirectoryStorage([]);
+	}
+}
+