AddMonths() public method

public AddMonths ( System.DateTime time, int months ) : System.DateTime
time System.DateTime
months int
return System.DateTime
Ejemplo n.º 1
0
        private void VerificationHelper(DateTime value, int addValue)
        {
            System.Globalization.Calendar tc = new TaiwanCalendar();
            DateTime newDate = tc.AddMonths(value, addValue);
            int totalYear = addValue / 12;
            int leftMonth = addValue % 12;
            int day = value.Day;
            int month = value.Month + leftMonth;
            int year = value.Year + totalYear;
            if (month > 12)
            {
                month = month % 12;
                year++;
            }

            if (month < 1)
            {
                year--;
                month = 12 + month;
            }

            int dayInMonth = 0;
            if (IsLeapYear(year))
            {
                dayInMonth = _DAYS_PER_MONTHS_IN_LEAP_YEAR[month];
            }
            else
            {
                dayInMonth = _DAYS_PER_MONTHS_IN_NO_LEAP_YEAR[month];
            }

            day = day > dayInMonth ? dayInMonth : day;
            DateTime desiredDate = new DateTime(year, month, day, value.Hour, value.Minute, value.Second, value.Millisecond);

            Assert.Equal(desiredDate.Year, newDate.Year);
            Assert.Equal(desiredDate.Month, newDate.Month);
            Assert.Equal(desiredDate.Day, newDate.Day);
            Assert.Equal(desiredDate.Hour, newDate.Hour);
            Assert.Equal(desiredDate.Minute, newDate.Minute);
            Assert.Equal(desiredDate.Second, newDate.Second);
            Assert.Equal(desiredDate.Millisecond, newDate.Millisecond);
        }
Ejemplo n.º 2
0
 public void NegTest2()
 {
     System.Globalization.Calendar tc = new TaiwanCalendar();
     DateTime dt = tc.MinSupportedDateTime;
     int addValue = _generator.GetInt32(-55);
     addValue = -addValue;
     Assert.Throws<ArgumentOutOfRangeException>(() =>
     {
         tc.AddMonths(dt, addValue);
     });
 }
Ejemplo n.º 3
0
        public void NegTest4()
        {
            System.Globalization.Calendar tc = new TaiwanCalendar();
            Random rand = new Random(-55);
            int year = rand.Next(tc.MinSupportedDateTime.Year, tc.MaxSupportedDateTime.Year - 1911);
            int month = rand.Next(1, 12);
            int day;
            if (tc.IsLeapYear(year))
            {
                day = rand.Next(1, _DAYS_PER_MONTHS_IN_LEAP_YEAR[month] + 1);
            }
            else
            {
                day = rand.Next(1, _DAYS_PER_MONTHS_IN_NO_LEAP_YEAR[month] + 1);
            }

            DateTime dt = new DateTime(year, month, day);
            int addValue = rand.Next(120000, Int32.MaxValue);
            Assert.Throws<ArgumentOutOfRangeException>(() =>
            {
                tc.AddMonths(dt, addValue);
            });
        }
Ejemplo n.º 4
0
        public void NegTest2()
        {
            System.Globalization.Calendar tc = new TaiwanCalendar();
            Random rand = new Random(-55);
            int year = rand.Next(tc.MinSupportedDateTime.Year, tc.MaxSupportedDateTime.Year - 1911);
            int month = rand.Next(1, 12);
            int day;
            if (tc.IsLeapYear(year))
            {
                day = rand.Next(1, 30);
            }
            else
            {
                day = rand.Next(1, 29);
            }

            DateTime dt = tc.ToDateTime(year, month, day, 0, 0, 0, 0);
            int addValue = rand.Next(Int32.MinValue, (tc.MinSupportedDateTime.Year - year) * 12);
            Assert.Throws<ArgumentOutOfRangeException>(() =>
            {
                tc.AddMonths(dt, addValue);
            });
        }