Symfony\Component\HttpFoundation\Tests\ResponseTest::testContentTypeCharset PHP Method

    public function testContentTypeCharset()
    {
        $response = new Response();
        $response->headers->set('Content-Type', 'text/css');

        // force fixContentType() to be called
        $response->prepare(new Request());

        $this->assertEquals('text/css; charset=UTF-8', $response->headers->get('Content-Type'));
    }