// mars-calendar.el — MarsCalendar uses sol period 88775.244 seconds.
// Two instants exactly one sol apart should differ by 1 in sol number.

fn run_test() -> Int {
    let cal: Calendar = mars_calendar()
    let base: Instant = unix_seconds(0)
    // 88775.244 s * 1e9 nanos = 88775244000000 nanos
    let one_sol_ns: Int = 88775244000000
    let one_sol: Duration = el_duration_from_nanos(one_sol_ns)
    let later: Instant = base + one_sol
    let ct1: CalendarTime = in_calendar(base, cal)
    let ct2: CalendarTime = in_calendar(later, cal)
    let sol1: String = cal_format(ct1, "%sol")
    let sol2: String = cal_format(ct2, "%sol")
    let diff: Int = str_to_int(sol2) - str_to_int(sol1)
    return diff
}

fn main() -> Void {
    println(int_to_str(run_test()))
}