expire test

main.dart

void main() async {
  final now = DateTime.parse("2022-07-09 12:02:00");
  final expirationTime1 = DateTime.parse("2022-07-09 12:03:00");
  final expirationTime2 = DateTime.parse("2022-07-09 12:01:00");
  final n = now.add(const Duration(minutes: -2)); // 2min前
  final n2 = now.add(const Duration(minutes: 2)); // 2min前(修正版)
  if (n.isBefore(expirationTime1)) {
    print("not expired1");
  } else {
    print("expired1");
  }
  if (n.isBefore(expirationTime2)) {
    print("not expired2");
  } else {
    print("expired2");
  }
  if (n2.isBefore(expirationTime1)) {
    print("not expired3");
  } else {
    print("expired3");
  }
  if (n2.isBefore(expirationTime2)) {
    print("not expired4");
  } else {
    print("expired4");
  }
}