AddTicks not work correctly

add ticks not work correctly in this simple : https://deck.net/d8843f388823586dca2a2b94bbbd6af1 Expected Result 2019-12-01T00:00:00.0000000 2019-11-30T23:59:59.9990000 2019-11-30T23:59:59.9990000 Actual Result 2019-12-01T00:00:00.0000000 2019-12-01T00:00:00.0000000 2019-11-30T23:59:59.9990000 i think to fix this problem its to replace: https://github.com/theolivenbaum/h5/blob/d9c8a733e6b55584c3bd37b1f461ae9378882550/H5/H5/shared/System/DateTime.cs#L454 with is : return new DateTime((ulong)(ticks + value)); or with this: return new DateTime((long)(ticks + value));

[hardhub]

@theolivenbaum I think you can use create$2 version inside AddTicks. Please use the following code (and I will not fork the repo for the moment).

addTicks: function (d, v) {
                v = System.Int64.is64Bit(v) ? v : System.Int64(v);

                var ticks = this.getTicks(d).add(v);
                var kind = d.kind;

                if (ticks.lt(this.TicksPerDay)) {
                    d = new Date(0);
                    d.setMilliseconds(d.getMilliseconds() + this.$getTzOffset(d).div(10000).toNumber());
                    d.setFullYear(1);
                } else {
                    d = new Date(ticks.sub(this.$getMinOffset()).div(10000).toNumber());

                    if (kind !== 1) {
                        d.setTime(d.getTime() + (d.getTimezoneOffset() * 60000));
                    }
                }

                d.kind = (kind !== undefined) ? kind : 0;
                d.ticks = ticks;

                return d;
            },

I have adjusted it a bit for needs of AddTicks. And it shows more correct result.

2019-12-01T00:00:00.0000000
2019-11-30T23:59:59.9990000
2019-11-30T23:59:59.9990000

Of course it is not 999 9999, but at least the behaviour is equal to other DateTime logic and bug is solved.

[theolivenbaum]

Looks good, I’ll add over the weekend when I’ve some time, thanks!