public void ReturnsPopularProducts_Successfully()
{
// Arrange
SetupShopperHistory();
// Act
var result = _target.GetProductPopularityAsync().Result.ToList();
// Assert
Assert.IsTrue(result.Single(s => s.ProductName == "testA").PopularityRank == 0);
Assert.IsTrue(result.Single(s => s.ProductName == "testB").PopularityRank == 1);
Assert.IsTrue(result.Single(s => s.ProductName == "testC").PopularityRank == 2);
}
public async Task <IEnumerable <Product> > OrderProductsAsync(IEnumerable <Product> products, SortOption sortOption)
{
switch (sortOption)
{
case SortOption.Low:
return(products.OrderBy(p => p.Price));
case SortOption.High:
return(products.OrderByDescending(p => p.Price));
case SortOption.Ascending:
return(products.OrderBy(p => p.Name));
case SortOption.Descending:
return(products.OrderByDescending(p => p.Name));
case SortOption.Recommended:
var productPopularity = await _popularProductService.GetProductPopularityAsync();
// Fair bit of complexity here
// Order by the product's popularity rank
// If no rank, use int.MaxValue, then by name (for consistency in results with no popularity)
return(products.OrderBy(o => productPopularity.SingleOrDefault(p => p.ProductName == o.Name)?.PopularityRank ?? int.MaxValue).ThenBy(o => o.Name));
case SortOption.None:
default:
break;
}
return(products);
}
