// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart=2.9

import "package:expect/expect.dart";

// Dart test program for DateTime.copyWith.

testCopyWith(
  DateTime original,
  int year,
  int month,
  int day,
  int hour,
  int minute,
  int second,
  int millisecond,
  bool isUtc,
) {
  final result = original.copyWith(
    year: year,
    month: month,
    day: day,
    hour: hour,
    minute: minute,
    second: second,
    millisecond: millisecond,
    isUtc: isUtc,
  );

  final expected = isUtc
      ? DateTime.utc(
          year != null ? year : original.year,
          month != null ? month : original.month,
          day != null ? day : original.day,
          hour != null ? hour : original.hour,
          minute != null ? minute : original.minute,
          second != null ? second : original.second,
          millisecond != null ? millisecond : original.millisecond,
        )
      : DateTime(
          year != null ? year : original.year,
          month != null ? month : original.month,
          day != null ? day : original.day,
          hour != null ? hour : original.hour,
          minute != null ? minute : original.minute,
          second != null ? second : original.second,
          millisecond != null ? millisecond : original.millisecond,
        );

  Expect.equals(expected, result);
}

void main() {
  final epoch = DateTime.utc(1970, 1, 1);
  final dst = DateTime.parse("2015-07-07T12:12:24Z");
  final leap = DateTime.parse("2012-02-28T12:12:24");

  for (var year in [null, -100, 1917, 2012]) {
    for (var month in [null, -1, 1, 2, 12, 14]) {
      for (var day in [null, -1, 1, 28, 29, 30, 31, 32]) {
        for (var hour in [null, -1, 0, 23, 25]) {
          for (var minute in [null, -1, 1, 59, 61]) {
            for (var second in [null, -1, 1, 59, 61]) {
              for (var millisecond in [null, -1, 1, 999, 1001]) {
                for (var isUtc in [false, true]) {
                  for (var base in [epoch, dst, leap]) {
                    testCopyWith(
                      base,
                      year,
                      month,
                      day,
                      hour,
                      minute,
                      second,
                      millisecond,
                      isUtc,
                    );
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}