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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

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Product type Paperback
Published in Jan 2023
Publisher Packt
ISBN-13 9781803236230
Length 348 pages
Edition 1st Edition
Languages
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Author (1):
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Alan Mellor Alan Mellor
Author Profile Icon Alan Mellor
Alan Mellor
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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

Wordz – integration test for our database

In this section, we’ll review an integration test for our Wordz application to get a feel for what they look like. We’ll cover the details of writing these tests and setting up the test tools in Chapter 14, Driving the Database Layer, and Chapter 15, Driving the Web Layer.

Fetching a word from the database

As part of our earlier design work, we identified that Wordz would need a place to store the candidate words to be guessed. We defined an interface called WordRepository to isolate us from the details of storage. At that iteration, we had only got as far as defining one method on the interface:

public interface WordRepository {
String fetchWordByNumber( int wordNumber );
}

The implementation of this WordRepository interface will access the database and return a word given its wordNumber. We will defer implementing this to Chapter 14, Driving the Database Layer. For now, let’s take an early look at what...

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