public String toString() {
        return string;
    }
@Test
    public void testBasics() {
        assertEquals("application/octet-stream",
                new MediaType("application", "octet-stream").toString());

        assertEquals("text/plain", new MediaType("text", "plain").toString());

        Map<String, String> parameters = new HashMap<>();
        assertEquals("text/plain", new MediaType("text", "plain", parameters).toString());

        parameters.put("charset", "UTF-8");
        assertEquals("text/plain; charset=UTF-8",
                new MediaType("text", "plain", parameters).toString());

        parameters.put("x-eol-style", "crlf");
        assertEquals("text/plain; charset=UTF-8; x-eol-style=crlf",
                new MediaType("text", "plain", parameters).toString());
    }