public void GetSwatchInternetTime()
        {
            var t1 = EssentialsTime.FromUnixTimeSeconds(1605361960);
            var r1 = (int)SwatchUtils.ToDouble(t1);

            var t2 = new DateTime(2020, 11, 14, 13, 52, 40, DateTimeKind.Utc);
            var r2 = (int)SwatchUtils.ToDouble(t2);

            var t3 = new DateTimeOffset(2020, 11, 14, 14, 52, 40, TimeSpan.FromHours(1));
            var r3 = (int)SwatchUtils.ToDouble(t3);

            var t4 = EssentialsTime.FromUnixTimeSeconds(1597646100);
            var r4 = (int)SwatchUtils.ToDouble(t4);

            var t5 = new DateTime(2020, 8, 17, 6, 35, 00, DateTimeKind.Utc);
            var r5 = (int)SwatchUtils.ToDouble(t5);

            var t6 = new DateTimeOffset(2020, 8, 17, 8, 35, 00, TimeSpan.FromHours(2));
            var r6 = (int)SwatchUtils.ToDouble(t6);

            Assert.AreEqual(619, r1, "#1");
            Assert.AreEqual(619, r2, "#2");
            Assert.AreEqual(619, r3, "#3");

            Assert.AreEqual(315, r4, "#1");
            Assert.AreEqual(315, r5, "#2");
            Assert.AreEqual(315, r6, "#3");
        }
        public void ParseSwatchInternetTime()
        {
            // Notice: A bit of the precision is lost in the conversions, so the seconds doesn't match the cases in the test above.

            Assert.AreEqual("07:33:36", SwatchUtils.ToTimeSpan(315).ToString("hh\\:mm\\:ss"), "#1");

            Assert.AreEqual("14:51:21", SwatchUtils.ToTimeSpan(619).ToString("hh\\:mm\\:ss"), "#2");
        }