public void GetTimeSlotStartDateShouldReturnCorrectStartDate1()
{
// Arrange
const int timeSlot = 0;
var expected = new DateTime(2018, 1, 1, 0, 0, 0);
// Act
var dateTime = _converter.GetTimeSlotStartDate(timeSlot);
// Assert
dateTime.ShouldBe(expected);
}
private (DateTime, DateTime) GetTimeSlotFrame(int timeSlot)
{
return(_converter.GetTimeSlotStartDate(timeSlot),
_converter.GetTimeSlotStartDate(timeSlot + 1));
}
public async Task <ApiPriceModel[]> Handle(AggregateRequest request, CancellationToken cancellationToken)
{
var startDate = request.StartDate.Parse();
var endDate = request.EndDate.Parse();
var isPortfolioEmpty = string.IsNullOrEmpty(request.Portfolio);
if (isPortfolioEmpty)
{
throw new ArgumentNullException(nameof(request.Portfolio));
}
if (request.ResultPoints <= 0)
{
throw new ArgumentOutOfRangeException(nameof(request.ResultPoints),
request.ResultPoints, "Provide positive value");
}
if (endDate < startDate)
{
throw new ArgumentOutOfRangeException(nameof(request.EndDate),
request.EndDate, $"Provide end date after {request.StartDate}");
}
var startTimeSlot = _converter.DateTimeToTimeSlot(startDate);
var endTimeSlot = _converter.DateTimeToTimeSlot(endDate);
var timeSlotsCount = endTimeSlot - startTimeSlot + 1;
if (timeSlotsCount < request.ResultPoints)
{
throw new ArgumentException("Time slots between start and end date less than " +
"result points requested." +
$"Time slots - {timeSlotsCount}, " +
$"Result points - {request.ResultPoints}");
}
if (timeSlotsCount == 1)
{
throw new ArgumentException("Time interval is too short. " +
"Use instead 'benchmark' endpoint");
}
var frame = timeSlotsCount / request.ResultPoints;
var rest = timeSlotsCount % request.ResultPoints;
var result = new List <ApiPriceModel>();
var leftTimeSlot = startTimeSlot;
for (var i = 0; i < request.ResultPoints; i++)
{
var rightTimeSlot = leftTimeSlot + frame;
if (rest > 0)
{
++rightTimeSlot;
--rest;
}
var benchmarks = new List <decimal>();
for (var j = leftTimeSlot; j < rightTimeSlot; j++)
{
try
{
var benchmark = await _priceModelService.GetBenchmark(j,
portfolio : request.Portfolio);
benchmarks.Add(benchmark.Price);
}
catch (PriceModelAbsentException)
{
// just ignore
}
}
var date = _converter.GetTimeSlotStartDate(rightTimeSlot - 1);
if (!benchmarks.Any())
{
throw new PriceModelAbsentException(date);
}
var priceModel = new ApiPriceModel(date,
benchmarks.Average());
result.Add(priceModel);
leftTimeSlot = rightTimeSlot;
}
return(result.ToArray());
}
