  @Test
  public void joinRoomFail() {

    assertThat(manager.getRooms(), not(hasItem(roomx)));

    exception.expect(RoomException.class);
    exception.expectMessage(containsString("must be created before"));
    userJoinRoom(roomx, userx, pidx, false);

    assertThat(manager.getRooms(), not(hasItem(roomx)));
  }