Merge pull request #16276 from owncloud/dav-quota-root

fix webdav quota check for the root of the dav endpoint

lib/private/connector/sabre/quotaplugin.php

@@ -89,6 +89,9 @@ class QuotaPlugin extends \Sabre\DAV\ServerPlugin {
 				$uri = '/' . $uri;
 			}
 			list($parentUri, $newName) = \Sabre\HTTP\URLUtil::splitPath($uri);
+			if(is_null($parentUri)) {
+				$parentUri = '';
+			}
 			$req = $this->server->httpRequest;
 			if ($req->getHeader('OC-Chunked')) {
 				$info = \OC_FileChunking::decodeName($newName);

tests/lib/connector/sabre/quotaplugin.php

@@ -92,7 +92,10 @@ class Test_OC_Connector_Sabre_QuotaPlugin extends \Test\TestCase {
 	private function buildFileViewMock($quota) {
 		// mock filesysten
 		$view = $this->getMock('\OC\Files\View', array('free_space'), array(), '', false);
-		$view->expects($this->any())->method('free_space')->withAnyParameters()->will($this->returnValue($quota));
+		$view->expects($this->any())
+			->method('free_space')
+			->with($this->identicalTo(''))
+			->will($this->returnValue($quota));
 
 		return $view;
 	}