/** Makes sure concrete types are properly initialized. */
  public void testParameters() {
    MediaType mt = MediaType.valueOf("application/atom+xml;type=entry");
    assertEquals("entry", mt.getParameters().getFirstValue("type"));

    mt = MediaType.valueOf("multipart/x-mixed-replace; boundary=\"My boundary\"");
    assertEquals("\"My boundary\"", mt.getParameters().getFirstValue("boundary"));
  }