public function testAuthentication()
{
$response = $this->execute([Middleware::DigestAuthentication([])->realm('My realm')->nonce('xxx')]);
$this->assertSame(401, $response->getStatusCode());
$this->assertSame('Digest realm="My realm",qop="auth",nonce="xxx",opaque="' . md5('My realm') . '"', $response->getHeaderLine('WWW-Authenticate'));
}
