public function testDataUrl()
    {
        $f = new Kwf_Assets_Dependency_File_Css(new Kwf_Assets_Dependency_EmptyProviderList(), 'kwf/tests/Kwf/Assets/DependencyCss/dataUrl.css');
        $c = $f->getContentsPacked()->getFileContents();
        $this->assertEquals('body { background-image: url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7); }
body { background-image: url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7); }
body { background-image: url(\'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\'); }
body { background-image: url(\'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\'); }
body { background-image: url("data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"); }
body { background-image: url("data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"); }', trim($c));
    }