public void FilterByBlueAndSmallReturns1()
{
// arrange
var filter = new ProductFilter();
var products = BuildProducts();
// act
var result = filter.ByColorAndSize(products, ProductColor.Blue, ProductSize.Small);
// assert
Assert.That(result.Count(), Is.EqualTo(1));
Assert.That(result, Has.All.Matches<Product>(x => x.Size == ProductSize.Small));
}
