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diff --git a/tests/lib/files/filesystem.php b/tests/lib/files/filesystem.php
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+++ b/tests/lib/files/filesystem.php
@@ -0,0 +1,110 @@
+<?php
+/**
+ * ownCloud
+ *
+ * @author Robin Appelman
+ * @copyright 2012 Robin Appelman icewind@owncloud.com
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Test\Files;
+
+class Filesystem extends \PHPUnit_Framework_TestCase {
+	/**
+	 * @var array tmpDirs
+	 */
+	private $tmpDirs=array();
+
+	/**
+	 * @return array
+	 */
+	private function getStorageData() {
+		$dir = \OC_Helper::tmpFolder();
+		$this->tmpDirs[] = $dir;
+		return array('datadir' => $dir);
+	}
+
+	public function tearDown() {
+		foreach ($this->tmpDirs as $dir) {
+			\OC_Helper::rmdirr($dir);
+		}
+	}
+
+	public function setUp() {
+		\OC\Files\Filesystem::clearMounts();
+	}
+
+	public function testMount() {
+		\OC\Files\Filesystem::mount('\OC\Files\Storage\Local',self::getStorageData(),'/');
+		$this->assertEquals('/',\OC\Files\Filesystem::getMountPoint('/'));
+		$this->assertEquals('/',\OC\Files\Filesystem::getMountPoint('/some/folder'));
+		list( , $internalPath)=\OC\Files\Filesystem::resolvePath('/');
+		$this->assertEquals('',$internalPath);
+		list( , $internalPath)=\OC\Files\Filesystem::resolvePath('/some/folder');
+		$this->assertEquals('some/folder',$internalPath);
+
+		\OC\Files\Filesystem::mount('\OC\Files\Storage\Local',self::getStorageData(),'/some');
+		$this->assertEquals('/',\OC\Files\Filesystem::getMountPoint('/'));
+		$this->assertEquals('/some/',\OC\Files\Filesystem::getMountPoint('/some/folder'));
+		$this->assertEquals('/some/',\OC\Files\Filesystem::getMountPoint('/some/'));
+		$this->assertEquals('/some/',\OC\Files\Filesystem::getMountPoint('/some'));
+		list( , $internalPath)=\OC\Files\Filesystem::resolvePath('/some/folder');
+		$this->assertEquals('folder',$internalPath);
+	}
+
+	public function testNormalize() {
+		$this->assertEquals('/path', \OC\Files\Filesystem::normalizePath('/path/'));
+		$this->assertEquals('/path/', \OC\Files\Filesystem::normalizePath('/path/', false));
+		$this->assertEquals('/path', \OC\Files\Filesystem::normalizePath('path'));
+		$this->assertEquals('/path', \OC\Files\Filesystem::normalizePath('\path'));
+		$this->assertEquals('/foo/bar', \OC\Files\Filesystem::normalizePath('/foo//bar/'));
+		$this->assertEquals('/foo/bar', \OC\Files\Filesystem::normalizePath('/foo////bar'));
+		if (class_exists('Normalizer')) {
+			$this->assertEquals("/foo/bar\xC3\xBC", \OC\Files\Filesystem::normalizePath("/foo/baru\xCC\x88"));
+		}
+	}
+
+	public function testHooks() {
+		if(\OC\Files\Filesystem::getView()){
+			$user = \OC_User::getUser();
+		}else{
+			$user=uniqid();
+			\OC\Files\Filesystem::init('/'.$user.'/files');
+		}
+		\OC_Hook::clear('OC_Filesystem');
+		\OC_Hook::connect('OC_Filesystem', 'post_write', $this, 'dummyHook');
+
+		\OC\Files\Filesystem::mount('OC\Files\Storage\Temporary', array(), '/');
+
+		$rootView=new \OC\Files\View('');
+		$rootView->mkdir('/'.$user);
+		$rootView->mkdir('/'.$user.'/files');
+
+		\OC\Files\Filesystem::file_put_contents('/foo', 'foo');
+		\OC\Files\Filesystem::mkdir('/bar');
+		\OC\Files\Filesystem::file_put_contents('/bar//foo', 'foo');
+
+		$tmpFile = \OC_Helper::tmpFile();
+		file_put_contents($tmpFile, 'foo');
+		$fh = fopen($tmpFile, 'r');
+		\OC\Files\Filesystem::file_put_contents('/bar//foo', $fh);
+	}
+
+	public function dummyHook($arguments) {
+		$path = $arguments['path'];
+		$this->assertEquals($path, \OC\Files\Filesystem::normalizePath($path)); //the path passed to the hook should already be normalized
+	}
+}