### Question:
LotteryTicketId { @Override public boolean equals(Object o) { if (this == o) { return true; } if (o == null || getClass() != o.getClass()) { return false; } var that = (LotteryTicketId) o; return id == that.id; } LotteryTicketId();  LotteryTicketId(int id); int getId(); @Override String toString(); @Override boolean equals(Object o); @Override int hashCode();  }### Answer:
@Test void testEquals() { var ticketId1 = new LotteryTicketId(); var ticketId2 = new LotteryTicketId(); var ticketId3 = new LotteryTicketId(); assertNotEquals(ticketId1, ticketId2); assertNotEquals(ticketId2, ticketId3); var ticketId4 = new LotteryTicketId(ticketId1.getId()); assertEquals(ticketId1, ticketId4); }