public function testApiToString_EncodesProtocol()
{
$method = 'GET';
$uri = '/index.html';
$headers = ['Cache-Control' => 'no-cache, must-revalidate, max-age=0', 'Connection' => 'keep-alive', 'Content-Encoding' => 'gzip', 'Content-Type' => 'text/html; charset=iso-8859-2', 'Date' => 'Tue, 23 Aug 2016 18:27:12 GMT'];
$body = 'text message';
$vers = '1.1';
$req = $this->createRequest($method, $uri, $headers, $body, $vers);
$expected = sprintf("%s %s HTTP/%s\r\n%s\r\n%s", $method, $uri, $vers, $this->callProtectedMethod($req, 'encodeHeaders', [$headers]), $body);
$this->assertSame($expected, (string) $req);
}