Introduction to IoC Container

IoC Container이규원 (gyuwon@live.com)

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Contents

• IoC• IoC Container• Test• Demo

IOC

IoC

IoC

• Inversion of Control

Library

User Code LibraryLibrary Library

Framework

Framework User CodeUser Code User Code

IoC Container

Services

Component Service

Loose Coupling

Component ServiceIService

Reus

abili

ty

Test

abili

ty

Dependency Injection

Component

Service

Injector

IService<<create>>

Service Locator

Component

Service

Locator

IService<<create>>

Dependency Inversion

Low-Level PackageHigh-Level Package

Component ServiceIService

IService

Test

Software Testing

• Automate,• automate,• automate,• and• automate!

TDD(Test-Driven Development)

Write a test

Fails

Write production codeSucceeds

Clean up

DDD(Domain-Driven Design)

• f : x -> y• DDD : Domain -> Software

BDD(Behavior-Driven Development)

Write a specification

Fails

Write production codeSucceeds

Clean up

Dom

ain

Testability

Test

Component ServiceIService

Fragile or Non-testable

Test Double

IService IoC Container

I’m testable!

DemoContact Manager

Architecture

Contact Manager Service

ASP.NET Web API

OWIN Self Host

Entity Framework

SQL Server

Get Action Method Unit Tests - 1

• Specification?

Repository Pattern

• IRepository

Get Action Method Unit Tests - 2

• Moq• Fluent Assertions

Dependency Injection

• Ninject

Post Action Method Unit Tests

• Add• SaveChanges• Exception Expected