public void MonthHelperTestNullValues(int?calendarYear, int?calendarMonth)
{
var monthYearHelper = new MonthYearHelper();
var getDate = monthYearHelper.GetFirstOfCalendarMonthDateTime(calendarYear, calendarMonth);
getDate.Should().Be(1.January(0001));
}
public void MonthHelperTestValidYearMonth(int?calendarYear, int?calendarMonth)
{
var monthYearHelper = new MonthYearHelper();
var getDate = monthYearHelper.GetFirstOfCalendarMonthDateTime(calendarYear, calendarMonth);
getDate.Should().Be(1.February(2020).At(23, 59, 59));
}