Implement PartialOrd for DateTime

[Kijewski]

No description provided.

[x-hgg-x]

Eq cannot be derived and must be implemented manually since it is not applicable to all fields.

[Kijewski]

Eq is more of a marker, having an empty body, but I made the implementation explicit.

[x-hgg-x]

Create a new function used in tests for comparing DateTime objects since the PartialEq implementation has changed :

fn check_equal_date_time(x: &DateTime, y: &DateTime) {
    assert_eq!(x.second, y.second);
    assert_eq!(x.minute, y.minute);
    assert_eq!(x.hour, y.hour);
    assert_eq!(x.month_day, y.month_day);
    assert_eq!(x.month, y.month);
    assert_eq!(x.year, y.year);
    assert_eq!(x.week_day, y.week_day);
    assert_eq!(x.year_day, y.year_day);
    assert_eq!(x.local_time_type, y.local_time_type);
    assert_eq!(x.unix_time, y.unix_time);
}

[Kijewski]

Create a new function used in tests for comparing DateTime objects since the PartialEq implementation has changed

Done.

[x-hgg-x]

A better implementation is to remove the Eq implementation for Datetime and compare only the Unix times for the PartialEq and PartialOrd implementations.

[x-hgg-x]

Closed in c4d7db5.