public function testInvokeMissingAssetFile()
{
$request = ServerRequestFactory::fromGlobals(['REQUEST_URI' => '/assets/nope.js']);
$response = new Response();
$next = function ($req, $res) {
return $res;
};
$res = $this->middleware->__invoke($request, $response, $next);
$this->assertSame($res, $response);
}