import 'package:flutter_test/flutter_test.dart';
import 'package:timezone/data/latest.dart' as tz;
import 'package:smoke_cess_app/services/date_service.dart';
import 'package:timezone/timezone.dart';

void main() {
  tz.initializeTimeZones();
  test('IsSameDay: false', () {
    bool result =
        isSameDay(DateTime.now(), DateTime.now().add(const Duration(days: 1)));
    expect(result, false);
  });
  test('IsSameDay: true', () {
    bool result = isSameDay(DateTime.now(), DateTime.now());
    expect(result, true);
  });
  test('CreateTZDateTimes: all the same days as today in next 6 weeks at 23:59',
      () {
    List<String> selectedDays = [
      weekDays.keys.elementAt(DateTime.now().weekday - 1)
    ];
    List<TZDateTime> expected = [];
    DateTime now = DateTime.now();
    final Duration offset = now.timeZoneOffset;
    final DateTime date =
        DateTime(now.year, now.month, now.day, 23, 59, 0, 0, 0);
    for (int i = 0; i <= trainingTime; i = i + 7) {
      expected.add(
          TZDateTime.local(date.year, date.month, date.day, 23, 59, 0, 0, 0)
              .add(Duration(days: i))
              // subtract offset since TZDateTime uses the UTC Timezone
              .subtract(offset));
    }
    List<TZDateTime> result = createTZDateTimes(selectedDays, 23, 59);
    expect(result, expected);
  });
}