public function testGetLanguage()
{
$this->assertEquals(null, $this->request->getLanguage());
$uri = new Uri('http://server.loc');
$stream = fopen('php://temp', 'wb+');
$streamObject = new Stream($stream);
$request = new ServerRequest('GET', $uri, $streamObject);
$this->assertEquals('en', $request->getLanguage(array('en', 'uk', 'ru')));
$request2 = $request->withHeader('Accept-Language', 'uk,ru;q=0.8,en-US;q=0.6,en;q=0.4');
$this->assertEquals('uk', $request2->getLanguage());
$request2 = $request->withHeader('Accept-Language', 'uk,ru;q=0.8,en-US;q=0.6,en;q=0.4');
$this->assertEquals('de', $request2->getLanguage(array('de', 'pl')));
$this->assertEquals('en', $request2->getLanguage(array('de', 'pl', 'en')));
}
