This project will be moved soon

Interface Design Workshop

This repository is helping me to keep my examples up-to-date and reachable for everyone who reads my blog or attend my "Interface Design" workshop.

I 'll update this readme as soon as I publish my blog-post.

Step 1

• Demostrate hard-coupling and difficulties to write (unit) test.

Step 2

• Introducing public interfaces
• Implementation of these new interfaces. But, Service1 still uses a "new" keyword for the service2 implementation, which makes no difference with the mocking problem on the test side.

Step 3

• Introducing a "service locator" (Static one, to spare a context for the demo)
• Usage of registration in production and test to mock the dependencies
• Talk about the evil "new" keyword.

Problem with the service locator:

• Only the consumers know the dependencies.
• In order to use the "consumer" we need to know which dependency used by which consumer, so we can register the dependencies to the locator.

Step 4

Introduce Dependency Injection

• Poor Men's

Step 5

Introduce Dependency Injection

• Ninject

Step 6

Examples

• Law of Demeter and Interface-Chain
• Principle of least astonishment
• Single Level of Abstraction and problems
• Interface segragation
• A-cyclic dependencies
• Service Broker and Shearing Layers