Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases now! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Test-Driven Development with Java

You're reading from   Test-Driven Development with Java Create higher-quality software by writing tests first with SOLID and hexagonal architecture

Arrow left icon
Product type Paperback
Published in Jan 2023
Publisher Packt
ISBN-13 9781803236230
Length 348 pages
Edition 1st Edition
Languages
Arrow right icon
Author (1):
Arrow left icon
Alan Mellor Alan Mellor
Author Profile Icon Alan Mellor
Alan Mellor
Arrow right icon
View More author details
Toc

Table of Contents (21) Chapters Close

Preface 1. Part 1: How We Got to TDD
2. Chapter 1: Building the Case for TDD FREE CHAPTER 3. Chapter 2: Using TDD to Create Good Code 4. Chapter 3: Dispelling Common Myths about TDD 5. Part 2: TDD Techniques
6. Chapter 4: Building an Application Using TDD 7. Chapter 5: Writing Our First Test 8. Chapter 6: Following the Rhythms of TDD 9. Chapter 7: Driving Design – TDD and SOLID 10. Chapter 8: Test Doubles – Stubs and Mocks 11. Chapter 9: Hexagonal Architecture –Decoupling External Systems 12. Chapter 10: FIRST Tests and the Test Pyramid 13. Chapter 11: Exploring TDD with Quality Assurance 14. Chapter 12: Test First, Test Later, Test Never 15. Part 3: Real-World TDD
16. Chapter 13: Driving the Domain Layer 17. Chapter 14: Driving the Database Layer 18. Chapter 15: Driving the Web Layer 19. Index 20. Other Books You May Enjoy

Summary

In this chapter, we’ve looked at how to solve the problem of testing problematic collaborators. We have learned how to use stand-in objects for collaborators called test doubles. We’ve learned that this gives us simple control over what those collaborators do inside our test code.

Two kinds of test double are especially useful to us: the stub and the mock. Stubs return data. Mocks verify that methods were called. We’ve learned how to use the Mockito library to create stubs and mocks for us.

We’ve used AssertJ to verify the SUT behaved correctly under the various conditions of our test doubles. We’ve learned how to test error conditions that throw exceptions.

These techniques have expanded our toolkit for writing tests.

In the next chapter, we are going to cover a very useful system design technique that allows us to get most of our code under FIRST unit test, and at the same time avoid the problems of testing collaborations with...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime