public void Test()
{
// The client code creates a builder object, passes it to the
// director and then initiates the construction process. The end
// result is retrieved from the builder object.
var director = new BuildingHouseDirector();
var builder = new HouseBuilder();
director.Builder = builder;
_testOutputHelper.WriteLine("Standard basic product:");
director.BuildSimpleHouse();
_testOutputHelper.WriteLine(builder.BuildHouse().ListParts());
_testOutputHelper.WriteLine("");
_testOutputHelper.WriteLine("Standard full featured product:");
director.BuildFullHouse();
_testOutputHelper.WriteLine(builder.BuildHouse().ListParts());
_testOutputHelper.WriteLine("");
// Remember, the Builder pattern can be used without a Director
// class.
_testOutputHelper.WriteLine("Custom product:");
builder.BuildWalls();
builder.InstallDoor();
_testOutputHelper.WriteLine(builder.BuildHouse().ListParts());
}