Skip to Content
xUnit Test Patterns: Refactoring Test Code
book

xUnit Test Patterns: Refactoring Test Code

by Gerard Meszaros
May 2007
Intermediate to advanced
944 pages
22h 7m
English
Addison-Wesley Professional
Content preview from xUnit Test Patterns: Refactoring Test Code

Chapter 26Design-for-Testability Patterns

Patterns in This Chapter

Dependency Injection 678

Dependency Lookup 686

Humble Object 695

Test Hook 709

Dependency Injection

How do we design the SUT so that we can replace its dependencies at runtime?

The client provides the depended-on object to the SUT.

image

Almost every piece of code depends on some other classes, objects, modules, or procedures. To unit-test a piece of code properly, we would like to isolate the code from its dependencies. This isolation is difficult to achieve if those dependencies are hard-coded in the form of literal classnames.

Dependency Injection is a way to allow the normal coupling ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Unit Testing Principles, Practices, and Patterns

Unit Testing Principles, Practices, and Patterns

Vladimir Khorikov
Clean Code Fundamentals

Clean Code Fundamentals

Robert C. Martin
Design Patterns: Elements of Reusable Object-Oriented Software

Design Patterns: Elements of Reusable Object-Oriented Software

Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides

Publisher Resources

ISBN: 9780131495050Purchase book