public void GetLastDayTest() { var my = new MonthYear(1, 2000); var actual = my.GetLastDay(); var expected = new DateTime(2000, 1, 31); Assert.AreEqual(expected, actual); my = new MonthYear(2, 2000); actual = my.GetLastDay(); expected = new DateTime(2000, 2, 29); Assert.AreEqual(expected, actual); }