public virtual TResult VisitCompositeProduct(ImmutableCompositeProduct product) =>
AggregateInterimResults(
// Calculate current product
this.VisitProduct(product),
// Aggregate values of parts
product.Parts.Aggregate(default(TResult), (interimResult, p) =>
AggregateInterimResults(interimResult, this.VisitPart(p))));
public void TestProductCreation()
{
// Create an immutable product
var ip = new ImmutableProduct(Guid.NewGuid(), "Test", 1M);
Assert.IsNotNull(ip);
// Create an immutable composite product. Note that both parts
// refer to the same product. Therefore the ImmutableProduct
// object has to be reused.
var icp = new ImmutableCompositeProduct(
Guid.NewGuid(), "Test", 1M,
new[] {
new Part() { ComponentProductID = ip.ProductID, Amount = 5 },
new Part() { ComponentProductID = ip.ProductID, Amount = 10 }
},
new[] { ip });
Assert.IsNotNull(ip);
Assert.AreSame(ip, icp.Parts[0].Part);
Assert.AreSame(icp.Parts[0].Part, icp.Parts[1].Part);
// Create an immutable composite product. Note that the part
// list as already immutable. Therefore it has to be reused
// and must not be copied.
var iplist = ImmutableList<ImmutablePart>.Empty
.Add(new ImmutablePart(ip.ProductID, 5, new[] { ip }));
icp = new ImmutableCompositeProduct(
Guid.NewGuid(), "Test", 1M, iplist, new[] { ip });
Assert.AreSame(icp.Parts, iplist);
// Create an immutable composite product. Note that the part
// inside the part list is already immutable. Therefore it has
// to be reused and must not be copied.
icp = new ImmutableCompositeProduct(
Guid.NewGuid(), "Test", 1M, new[] { iplist[0] }, new[] { ip });
Assert.AreSame(icp.Parts[0], iplist[0]);
}