v1.3.0

Added

• [DuckTyped] extension methods: the receiver is duck-typed too, so person.Greet() works for any type fitting the interface. Previously reported with IFITQUACKS004.

• A public property or field of a delegate type satisfies an interface method of the same name, which makes an object literal a test double: Duck.As<IRepository>(new { Find = (Func<int, Order?>)(id => ...) }).

• Duck.Stub<TShape>(value) and Duck.Stub<TShape>() return a test double that forwards the members the value provides and throws DuckStubException for the rest. A member that is present but doesn't fit is still reported with IFITQUACKS001.

• Duck.Merge<TShape>(first, second) (and a three-value overload) builds one interface from several values, taking each member from the first value providing it - a spy or a partial fake without a mocking library.

• Sequences are adapted element by element: IEnumerable<T>, IReadOnlyCollection<T> and IReadOnlyList<T> parameters accept a List<Person> or a Person[] whose elements fit, and Duck.As<IReadOnlyList<INamed>>(people) keeps Count and the indexer.

• Duck.To<TTarget>(value) copies a value into a new one of a concrete type, filling the constructor and the remaining settable members from the members of the same name. Diagnostic IFITQUACKS009.

• Samples: IfItQuacks.Sample.Extensions, IfItQuacks.Sample.Sequences, IfItQuacks.Sample.Testing and IfItQuacks.Sample.Copying.

Fixed

• greeter?.Greet(duck) is intercepted. A conditional access used to fall through to the runtime fallback and throw DuckTypeMismatchException although the call was right there in the project.

• base.Greet(duck) no longer silently calls the overriding method. A base call is not virtual, which neither an interceptor nor the fallback overload can reproduce, so it is reported with the new IFITQUACKS008.

• An argument typed as Person? shares the adapter generated for Person instead of getting a second one whose generated code warned about a possible null dereference.

Changed

• IFITQUACKS007 is titled Duck conversion target must be an interface and names the conversion (Duck.As, Duck.Stub or Duck.Merge) that was called.