assertEquals("image", newType.type());
    assertEquals("yams", newType.subtype());
  }

  public void testCreateTextType() {
    MediaType newType = MediaType.createTextType("yams");
    assertEquals("text", newType.type());
    assertEquals("yams", newType.subtype());
  }

  public void testCreateVideoType() {
    MediaType newType = MediaType.createVideoType("yams");

  }

  /**
   * Creates a media type with the "text" type and the given subtype.
   *
   * @throws IllegalArgumentException if subtype is invalid
   */
  static MediaType createTextType(String subtype) {
    return create(TEXT_TYPE, subtype);
  }

  /**
   * Creates a media type with the "video" type and the given subtype.
   *