private Period(
TwoThousandsCommonEraYear startYear,
TwoThousandsCommonEraYear endYear)
{
EndYear = endYear;
StartYear = startYear;
}
public void Can_Be_Created_From_Integer_Year(
int year)
{
TwoThousandsCommonEraYear
.FromYearAsNumber(year)
.Should()
.NotBeNull();
}
public void Has_Expected_AsTwoDigitString_Property(
string twoDigitYear)
{
TwoThousandsCommonEraYear
.ParseTwoDigitYear(twoDigitYear)
.AsTwoDigitString
.Should()
.Be(twoDigitYear);
}
public void Parses_Correctly_From_Two_Digit_Year(
string twoDigitYear,
int expectedParsedYear)
{
TwoThousandsCommonEraYear
.ParseTwoDigitYear(twoDigitYear)
.AsInt
.Should()
.Be(expectedParsedYear);
}
public void Throws_Exception_When_Trying_To_Create_From_Invalid_Integer_Year(
int invalidYear)
{
Assert
.That(
() => TwoThousandsCommonEraYear.FromYearAsNumber(invalidYear),
Throws
.Exception
.TypeOf <ArgumentException>());
}
public void Throws_ArgumentException_When_Asked_To_Parse_Invalid_Two_Digit_Year(
string invalidTwoDigitYear)
{
Assert
.That(
() => TwoThousandsCommonEraYear.ParseTwoDigitYear(invalidTwoDigitYear),
Throws
.Exception
.TypeOf <ArgumentException>());
}
public static Period FromInstantInPeriod(DateTime instantInPeriod)
{
var endYear =
instantInPeriod.Month < 4
? instantInPeriod.Year - 1
: instantInPeriod.Year;
return(new Period(
startYear: TwoThousandsCommonEraYear.FromYearAsNumber(endYear - 1),
endYear: TwoThousandsCommonEraYear.FromYearAsNumber(endYear)));
}
public void Is_Equatable_With_Another_TwoThousandsCommonEraYear(
string left,
string right,
bool expectedEqual)
{
var leftYear =
TwoThousandsCommonEraYear
.ParseTwoDigitYear(left);
var rightYear =
TwoThousandsCommonEraYear
.ParseTwoDigitYear(right);
leftYear
.Equals(rightYear)
.Should()
.Be(expectedEqual);
}
public static Period ParsePeriodString(string periodString)
{
if (string.IsNullOrWhiteSpace(periodString))
{
throw new ArgumentException($"{periodString} cannot be parsed; should be 4 chars e.g. 1516 to represent period 2015/2016", nameof(periodString));
}
if (periodString.Length != 4)
{
throw new ArgumentException($"{periodString} cannot be parsed; should be 4 chars e.g. 1516 to represent period 2015/2016", nameof(periodString));
}
return(new Period(
startYear:
TwoThousandsCommonEraYear
.ParseTwoDigitYear(periodString.Substring(0, 2)),
endYear:
TwoThousandsCommonEraYear
.ParseTwoDigitYear(periodString.Substring(2, 2))));
}
