public async Task Handler_ReturnsSalesDTOCollection()
{
// Arrange
var startDate = DateTime.Parse("2018-01-01");
var endDate = DateTime.Parse("2021-01-01");
var query = new GetSalesByDateQuery {
StartDate = startDate, EndDate = endDate
};
// Act
var handler = new GetSalesByDateQuery.GetSalesByDateQueryHandler(Context, Mapper);
var result = await handler.Handle(query, CancellationToken.None);
// Assert
(result as List <SaleDTO>).Count.ShouldBeGreaterThanOrEqualTo(4);
result.ShouldBeOfType <List <SaleDTO> >();
result.ShouldNotBeNull();
}
/// <inheritdoc/>
/// <exception cref="ArgumentOutOfRangeException"></exception>
public async Task <SaleStatisticDTO> GetSalesStatistic(TimeUnit timeUnit, DateTime startDate, DateTime endDate)
{
if (endDate <= startDate)
{
throw new ArgumentOutOfRangeException(nameof(endDate));
}
var salesQuery = new GetSalesByDateQuery {
StartDate = startDate, EndDate = endDate
};
var sales = await _mediator.Send(salesQuery);
var saleStatistic = timeUnit switch
{
TimeUnit.Quarter => CalculateQuarterStatistic(sales, startDate, endDate),
TimeUnit.Month => CalculateMonthStatistic(sales, startDate, endDate),
TimeUnit.Week => CalculateWeekStatistic(sales, startDate, endDate),
TimeUnit.Day => CalculateDayStatistic(sales, startDate, endDate),
_ => null,
};
return(saleStatistic);
}