Swift Date往返序列化反序列化后相等性校验失败的问题咨询

我最近在写Swift测试的时候遇到了一个奇怪的问题：明明看起来完全一样的两个Date对象，用#expect直接比较相等性就是不通过。下面是我的测试代码：

import Foundation
import Testing

struct TestGrouping {
    @Test func formattingWorks() async throws {
        let dateFormatter = ISO8601DateFormatter()
        let curDate = Date.now
        let date: Date = dateFormatter.date(
            from: dateFormatter.string(from: curDate))!

        #expect(curDate == date)
    }
}

测试套件返回的结果显示两个日期的打印值完全一致，但校验就是失败了：

߈  Test formattingWorks() started.
ࢄ  Test formattingWorks() recorded an issue at TestFormatting.swift:21:9: Expectation failed: (curDate → 2024-11-03 17:28:27 +0000) == (date → 2024-11-03 17:28:27 +0000)
ࢄ  Test formattingWorks() failed after 0.006 seconds with 1 issue.
ࢄ  Suite TestGrouping failed after 0.006 seconds with 1 issue.
ࢄ  Test run with 1 test failed after 0.006 seconds with 1 issue.

后来我把#expect语句改成了比较时间戳，补上了缺失的括号：

#expect(curDate.timeIntervalSince1970 == date.timeIntervalSince1970)

这时候才发现，这两个Date对象的实际时间戳其实是不一样的：

ࢄ  Test formattingWorks() recorded an issue at TestFormatting.swift:18:9: Expectation failed: (curDate.timeIntervalSince1970 → 1730655168.151483) == (date.timeIntervalSince1970 → 1730655168.0)

我也尝试过给dateFormatter设置时区：dateFormatter.timeZone = TimeZone.current，但问题还是存在。

想请教一下，我该怎么做才能让Date对象在序列化反序列化的往返过程中保持真正的相等呢？

备注：内容来源于stack exchange，提问作者wirrbel