public void SimplifedDate_AddMonths_ShouldReturnCorrectDate()
{
// Arrange
var date = new SimplifiedDate(2017, 12);
var anotherDate = new SimplifiedDate(2015, 8);
// Act
var date1 = date.AddMonths(1);
var date2 = date.AddMonths(0);
var date3 = date.AddMonths(-1);
var date4 = date.SubtractMonths(1);
var date5 = date.SubtractMonths(-1);
var months1 = date.GetDateDifferenceInMonths(anotherDate);
var months2 = anotherDate.GetDateDifferenceInMonths(date);
// Assert
Assert.AreEqual(1, date1.Month);
Assert.AreEqual(2018, date1.Year);
Assert.AreEqual(12, date2.Month);
Assert.AreEqual(2017, date2.Year);
Assert.AreEqual(11, date3.Month);
Assert.AreEqual(2017, date3.Year);
Assert.AreEqual(11, date4.Month);
Assert.AreEqual(2017, date4.Year);
Assert.AreEqual(1, date5.Month);
Assert.AreEqual(2018, date5.Year);
Assert.AreEqual(28, months1);
Assert.AreEqual(-28, months2);
}
public void SimplifiedDate_UsingMidFebruary_ShouldRoundCorrectlyForLeapYears()
{
// Arrange + Act
var leapYearDate = new SimplifiedDate(new System.DateTime(2016, 2, 15), MonthRounding.MonthNearest);
var nonLeapYearDate = new SimplifiedDate(new System.DateTime(2017, 2, 15), MonthRounding.MonthNearest);
// Assert
Assert.AreEqual(2, leapYearDate.Month); // 29 days, so the 15th rounds down
Assert.AreEqual(3, nonLeapYearDate.Month); // 28 days, so 15th rounds up
}
public void SimplifiedDate_AddMonths_ShouldNotChangeObject()
{
// Arrange
var date = new SimplifiedDate(new System.DateTime(2017, 12, 31), MonthRounding.MonthLast);
var expectedDate = new SimplifiedDate(new System.DateTime(2017, 12, 31), MonthRounding.MonthLast);
// Act
date.AddMonths(1);
// Assert - enumerate the public properties
Assert.AreEqual(expectedDate.Year, date.Year);
Assert.AreEqual(expectedDate.Month, date.Month);
}
public void SimplifiedDate_AddMonths_ShouldReturnCorrectNewObject()
{
// Arrange
var date = new SimplifiedDate(new System.DateTime(2017, 12, 31), MonthRounding.MonthLast);
var expectedDate = new SimplifiedDate(new System.DateTime(2018, 1, 31), MonthRounding.MonthLast);
// Act
var newDate = date.AddMonths(1);
// Assert
Assert.AreEqual(expectedDate.Month, newDate.Month);
Assert.AreEqual(expectedDate.Year, newDate.Year);
}
public void SimplifiedDate_UsingEndOfMonthValues_ShouldReturnCorrectRounding()
{
// Arrange
var lateMonthDate = new System.DateTime(2017, 12, 31);
// Act
var dateMonthLast = new SimplifiedDate(lateMonthDate, MonthRounding.MonthLast);
var dateMonthNearest = new SimplifiedDate(lateMonthDate, MonthRounding.MonthNearest);
// Assert
// Take start of month
Assert.AreEqual(2017, dateMonthLast.Year);
Assert.AreEqual(12, dateMonthLast.Month);
// Round up
Assert.AreEqual(2018, dateMonthNearest.Year);
Assert.AreEqual(1, dateMonthNearest.Month);
}
