public function testMakeCollectionWithInvalidETag()
 {
     $testDest = "/collection/new_collection";
     $backend = new ezcWebdavFileBackend($this->tempDir . 'backend/');
     // Initialize all property directories
     $req = new ezcWebdavPropFindRequest('');
     $req->allProp = true;
     $req->setHeader('Depth', ezcWebdavRequest::DEPTH_INFINITY);
     $req->validateHeaders();
     $backend->propFind($req);
     $eTag = $backend->getProperty('/collection', 'getetag')->etag;
     $req = new ezcWebdavMakeCollectionRequest($testDest);
     $req->setHeader('If-None-Match', array($eTag));
     $req->validateHeaders();
     $res = $backend->makeCollection($req);
     $this->assertEquals(new ezcWebdavErrorResponse(ezcWebdavResponse::STATUS_412, '/collection', 'If-None-Match header check failed.'), $res, 'Expected response does not match real response.', 0, 20);
 }