Crate nullable_utils

This crate provides helpers for working with Nullables as described by James Shore in Testing without Mocks.

Macros

• nullable_wrapper
  Create a wrapper enum for switching (internal) implementations efficiently.

Structs

• OutputListener
  Listener implements the emitter side of the [Output Tracking pattern].
• OutputTracker
  Tracker implements the receiver side of the [Output Tracking pattern].

Enums

• NulledResponses
  NulledResponses helps with implementing Configurable Responses for Nullable types.