public function testInvokeCacheRead()
{
file_put_contents(sys_get_temp_dir() . '/all.css', 'cached data');
$request = ServerRequestFactory::fromGlobals(['REQUEST_URI' => '/assets/all.css']);
$response = new Response();
$next = function ($req, $res) {
return $res;
};
$res = $this->middleware->__invoke($request, $response, $next);
$this->assertNotSame($res, $response, 'Should be a new response');
$this->assertSame(200, $res->getStatusCode(), 'Is 200 on success');
$this->assertSame('application/css', $res->getHeaderLine('Content-Type'));
$this->assertContains('cached data', '' . $res->getBody(), 'Is cached data.');
unlink(sys_get_temp_dir() . '/all.css');
}