Better, cleaner code-every developer's dream. Test-driven development is how you'll achieve it! From creating a robust test infrastructure to designing methods, classes, and packages that will stand the test of time, this book provides in-depth instructions for revitalizing your programming. Whether you're writing new code or fixing legacy code, you'll learn to select test cases, use test doubles, and generate test data. With information on agile methodology to round out the development process, you'll have all the tools you need!

Highlights:

1. Object-oriented design
2. Refactoring legacy code
3. Test-driven maintenance
4. Test infrastructure
5. Test pyramid
6. Test code design pattern
7. Global test doubles
8. Test class hierarchies
9. Test data classes
10. ABAP Development Tools (ADT)
11. Agile development

Create integration tests, component tests, and more

Klappentext

Better, cleaner code-every developer's dream. Test-driven development is how you'll achieve it! From creating a robust test infrastructure to designing methods, classes, and packages that will stand the test of time, this book provides in-depth instructions for revitalizing your programming. Whether you're writing new code or fixing legacy code, you'll learn to select test cases, use test doubles, and generate test data. With information on agile methodology to round out the development process, you'll have all the tools you need!

Highlights:

1. Object-oriented design
2. Refactoring legacy code
3. Test-driven maintenance
4. Test infrastructure
5. Test pyramid
6. Test code design pattern
7. Global test doubles
8. Test class hierarchies
9. Test data classes
10. ABAP Development Tools (ADT)
11. Agile development

Zusammenfassung

Better, cleaner codeevery developer's dream. Test-driven development is how you'll achieve it! From creating a robust test infrastructure to designing methods, classes, and packages that will stand the test of time, this book provides in-depth instructions for revitalizing your programming. Whether you're writing new code or fixing legacy code, you'll learn to select test cases, use test doubles, and generate test data. With information on agile methodology to round out the development process, you'll have all the tools you need!

Highlights:

1. Object-oriented design
2. Refactoring legacy code
3. Test-driven maintenance
4. Test infrastructure
5. Test pyramid
6. Test code design pattern
7. Global test doubles
8. Test class hierarchies
9. Test data classes
10. ABAP Development Tools (ADT)
11. Agile development

Inhalt
... Foreword ... 23

... Preface ... 25

... Continuous Improvements ... 25

... Agile Methods ... 26

... Target Groups and Prerequisites ... 26

... Structure of the Book ... 27

... Information Boxes ... 30

... Limitations ... 30

... Acknowledgments ... 31

1 ... Introduction ... 33

1.1 ... Sustainability: Development and Maintenance with a Test Infrastructure ... 34

1.2 ... Agility: Practices of Agile Software Engineering ... 39

1.3 ... Efficiency: Compliance with Design Principles ... 40

1.4 ... Effectivity: Communication with Diagrams ... 44

1.5 ... Summary ... 46

PART I ... Building a Test Infrastructure ... 47

2 ... The Sample Application ... 49

2.1 ... Master Data Management ... 50

2.2 ... User Interface ... 52

2.3 ... Backend ... 54

2.4 ... Summary ... 56

3 ... Code-Based Test Improvement ... 57

3.1 ... Introduction to the Test Code ... 57

3.2 ... General Clean Code Principles ... 70

3.3 ... Test-Oriented Clean Code Principles ... 79

3.4 ... Summary ... 86

4 ... Design-Based Test Improvement ... 87

4.1 ... Base Classes of Test Classes ... 87

4.2 ... Usage of Help Classes by Test Classes ... 93

4.3 ... Summary ... 100

5 ... Robust Integration Test ... 103

5.1 ... Improvement Process ... 103

5.2 ... Independence of Test Methods ... 104

5.3 ... Repeatability of Test Methods ... 108

5.4 ... Summary ... 116

6 ... Minimizing Dependencies ... 117

6.1 ... Simplification of Use ... 118

6.2 ... Segregation of Use ... 125

6.3 ... Independence of Creations ... 129

6.4 ... Independence of Extensions ... 135

6.5 ... Summary ... 139

7 ... Isolated Component Test ... 141

7.1 ... Transforming the Integration Test ... 142

7.2 ... Scaling with a Test Language ... 154

7.3 ... Test-Driven Development ... 161

7.4 ... Liskov Substitution Principle ... 165

7.5 ... Summary ... 167

8 ... Redesign with Unit Tests ... 169

8.1 ... Object-Oriented API for Entities ... 171

8.2 ... Highlighting Changes as an Independent Component ... 174

8.3 ... Tests for the Highlight Changes Class ... 182

8.4 ... Summary ... 187

PART II ... Test-Oriented ABAP Design ... 189

9 ... Designing Methods ... 191

9.1 ... Rules for Implementing Methods ... 192

9.2 ... Rules for Method Signatures ... 200

9.3 ... Summary ... 213

10 ... Designing Classes ... 215

10.1 ... Creation of an Object by Its Class ... 216

10.2 ... Creation of an Object by a Factory Class ... 219

10.3 ... Types of Dependencies between Classes ... 222

10.4 ... Interfaces of a Class ... 225

10.5 ... Levels of Abstraction within a Class ... 228

10.6 ... Catalog Design Pattern ... 235

10.7 ... Cohesion ... 237

10.8 ... Summary ... 242

11 ... Designing Packages ... 245

11.1 ... Package Concept ... 245

11.2 ... Product Packages ... 251

11.3 ... Test Packages ... 253

11.4 ... Summary ... 255

12 ... Test Cases ... 257

12.1 ... Test Design ... 257

12.2 ... Test Pyramid ... 261

12.3 ... Test Coverage ... 264

12.4 ... Summary ... 266

13 ... Test Doubles ... 267

13.1 ... Advantages of Test Doubles ... 267

13.2 ... Specifying Test Doubles ... 271

13.3 ... Designing Test Doubles ... 277

13.4 ... Injecting Test Doubles ... 282

13.5 ... Summary ... 296

14 ... Global Test Doubles ... 297

14.1 ... Test Double for a Method ... 298

14.2 ... Test Double for Two Methods ... 303

14.3 ... Method Doubles and Their Combinations ... 309

14.4 ... Globalizing Test Doubles ... 316

14.5 ... Designing Global Test Doubles ... 318

14.6 ... Adapting the Design of Global Test Doubles ... 320

14.7 ... Summary ... 325

15 ... Test Classes ... 327

15.1 ... ABAP Unit Test Framework ... 327

15.2 ... Local Test Classes ... 329

15.3 ... Design Patterns for Test Classes ... 332

15.4 ... Test Class Hierarchies ... 335

15.5 ... Global Test Classes ... 339

15.6 ... Summary ... 342

16 ... Test Data ... 343

16.1 ... Test Data Container ... 343

16.2 ... Test Data Objects ... 352

16.3 ... Summary ... 362

17 ... Test Infrastructures ... 363

17.1 ... Components of Test Infrastructures ... 363

17.2 ... Application Scenarios for a Global Test Infrastructure ... 365

17.3 ... Development Processes Using a Test Infrastructure ... 370

17.4 ... Summary ... 373

PART III ... Agile Development of a New Application ... 375

18 ... Preparation for Test-Driven Development ... 377

18.1 ... Specification of the Sample Application ... 378
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