v/vlib/time/time_addition_test.v

import time

fn test_add_to_day_in_the_previous_century() {
	a := time.parse_iso8601('1900-01-01')!
	aa := a.add_days(180)
	assert aa.ymmdd() == '1900-06-30'
}

fn test_add_to_day_in_the_past() {
	a := time.parse_iso8601('1990-03-01')!
	aa := a.add_days(180)
	assert aa.ymmdd() == '1990-08-28'
}

fn test_add_to_day_in_the_recent_past() {
	a := time.parse_iso8601('2021-03-01')!
	aa := a.add_days(180)
	assert aa.ymmdd() == '2021-08-28'
}

fn test_add_to_day_in_the_future_1() {
	a := time.parse_iso8601('3000-11-01')!
	aa := a.add_days(180)
	dump(a.debug())
	dump(aa.debug())
	assert aa.ymmdd() == '3001-04-30'
}

fn test_add_to_day_in_the_future_2() {
	a := time.parse_iso8601('3000-12-30')!
	aa := a.add_days(180)
	assert aa.ymmdd() == '3001-06-28'
}