assertFalse(PLAIN_TEXT_UTF_8.withParameter("charset", "UTF-16").is(PLAIN_TEXT_UTF_8));
    assertFalse(PLAIN_TEXT_UTF_8.is(PLAIN_TEXT_UTF_8.withParameter("charset", "UTF-16")));
  }

  public void testParse_empty() {
    assertThrows(IllegalArgumentException.class, () -> MediaType.parse(""));
  }

  public void testParse_badInput() {
    assertThrows(IllegalArgumentException.class, () -> MediaType.parse("/"));