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Autorentext

James Bender is Vice President of Technology for Improving Enterprises. He is a Microsoft MVP, working on everything from small, single-user applications to Enterprise-scale, multi-user systems. Jeff McWherter is a Partner and Director of Development at Gravity Works Design and Development. In 2010 Jeff was awarded with the Microsoft MVP for the third consecutive year.

Klappentext

Start working with test driven development processes to build better applications If you want to write robust software that is simple to implement and maintain, you need to use Test Driven Development (TDD). This hands-on guide shows you how, providing invaluable insight for creating effective TDD processes. With the help of source code and examples featured in C#, the authors walk you through the TDD methodology and show you how to apply it to a real-world application. You'll explore the application as it's built from scratch and follow each step involved in development, including problems that arise and the solutions to apply. Within no time, you'll be designing your own successful TDD processes.

Professional Test Driven Development with C#:

• Describes common software problems and provides refactoring practices that resolve them

• Shows patterns that can be used to test WPF and Silverlight applications

• Helps you ensure that when a defect is fixed it stays fixed without causing unexpected side effects

• Shows how to structure your MVC application for testability

• Shares the easy steps that can be taken to test WCF services

• Explains how to run integration tests to ensure that everything works as planned

• Uncovers best practices for writing good tests that are readable and maintainable

Wrox Professional guides are planned and written by working programmers to meet the real-world needs of programmers, developers, and IT professionals. Focused and relevant, they address the issues technology professionals face every day. They provide examples, practical solutions, and expert education in new technologies, all designed to help programmers do a better job.

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Zusammenfassung
Hands-on guidance to creating great test-driven development practice Test-driven development (TDD) practice helps developers recognize a well-designed application, and encourages writing a test before writing the functionality that needs to be implemented.

Inhalt

INTRODUCTION xxv

PART I: GETTING STARTED

CHAPTER 1: THE ROAD TO TEST-DRIVEN DEVELOPMENT 3

The Classical Approach to Software Development 4

A Brief History of Software Engineering 4

From Waterfall to Iterative and Incremental 5

A Quick Introduction to Agile Methodologies 6

A Brief History of Agile Methodologies 6

The Principles and Practices of Test-Driven Development 7

The Concepts Behind TDD 8

TDD as a Design Methodology 8

TDD as a Development Practice 8

The Benefi ts of TDD 9

A Quick Example of the TDD Approach 10

Summary 17

CHAPTER 2: AN INTRODUCTION TO UNIT TESTING 19

What Is a Unit Test? 19

Unit Test Definition 20

What Is Not a Unit Test? 20

Other Types of Tests 22

A Brief Look at NUnit 24

What Is a Unit Test Framework? 24

The Basics of NUnit 25

Decoupling with Mock Objects 28

Why Mocking Is Important 28

Dummy, Fake, Stub, and Mock 29

Best and Worst Practices 35

A Brief Look at Moq 36

What Does a Mocking Framework Do? 36

A Bit About Moq 36

Moq Basics 36

Summary 40

CHAPTER 3: A QUICK REVIEW OF REFACTORING 41

Why Refactor? 42

A Project's Lifecycle 42

Maintainability 43

Code Metrics 43

Clean Code Principles 45

OOP Principles 45

Encapsulation 45

Inheritance 46

Polymorphism 48

The SOLID Principles 49

The Single Responsibility Principle 50

The Open/Close Principle 50

The Liskov Substitution Principle 51

The Interface Segregation Principle 51

The Dependency Inversion Principle 52

Code Smells 52

What Is a Code Smell? 52

Duplicate Code and Similar Classes 53

Big Classes and Big Methods 54

Comments 55

Bad Names 56

Feature Envy 57

Too Much If/Switch 58

Try/Catch Bloat 59

Typical Refactoring 60

Extract Classes or Interfaces 60

Extract Methods 62

Rename Variables, Fields, Methods, and Classes 66

Encapsulate Fields 67

Replace Conditional with Polymorphism 68

Allow Type Inference 71

Summary 71

CHAPTER 4: TEST-DRIVEN DEVELOPMENT: LET THE TESTS BE YOUR GUIDE 73

It Starts with the Test 74

Red, Green, Refactor 76

The Three Phases of TDD 77

The Red Phase 77

The Green Phase 78

The Refactoring Phase 79

Starting Again 79

A Refactoring Example 79

The First Feature 80

Making the First Test Pass 83

The Second Feature 83

Refactoring the Unit Tests 85

The Third Feature 87

Refactoring the Business Code 88

Correcting Refactoring Defects 91

The Fourth Feature 93

Summary 94

CHAPTER 5: MOCKING EXTERNAL RESOURCES 97

The Dependency Injection Pattern 98

Working with a Dependency Injection Framework 99

Abstracting the Data Access Layer 108

Moving the Database Concerns Out of the Business Code 108

Isolating Data with the Repository Pattern 108

Injecting the Repository 109

Mocking the Repository 112

Summary 113

PART II: PUTTING BASICS INTO ACTION

CHAPTER 6: STARTING THE SAMPLE APPLICATION 117

Defi ning the Project 118

Developing the Project Overview 118

Defi ning the Target Environment 119

Choosing the Application Technology 120

Defi ning the User Stories 120

Collecting the Stories 120

Defi ning the Product Backlog 122

The Agile Development Process 123

Estimating 124

Working in Iterations 124

Communication Within Your Team 126

Iteration Zero: Your First Iteration 127

Testing in Iteration Zero 127

Ending an Iteration 128

Creating the Project 129

Choosing the Frameworks 129

Defi ning the Project Structure 131

Organizing Project Folders 131

Creating the Visual Studio Solution 132

Summary 134

CHAPTER 7: IMPLEMENTING THE FIRST USER STORY 137

The First Test 138

Choosing the First Test 138

Naming the Test 139

Writing the Test 140

Implementing the Functionality 148

Writing the Simplest Thing That Could Possibly Work 148

Running the Passing Test 157

Writing the Next Test 158

Improving the Code by Refactoring 165

Triangulation of Tests 166

Summary 166

CHAPTER 8: INTEGRATION TESTING 169

Integrate Early; Integrate Often 170

Writing Integration Tests 171

How to Manage the Database 171

How to Write Integration Tests 172

Reviewing the ItemTypeRepository 173

Adding Ninject for Dependency Injection 174

Creating the Fluent NHibernate Confi guration 177

Creating the Fluent NHibernate Mapping 179

Creating the Integration Test 183

End-to-End Integration Tests 191

Keeping Various Types of Tests Apart 191

When and How to Run Integration Tests 191

Summary 192

PART III: TDD SCENARIOS

CHAPTER 9: TDD ON THE WEB 197

ASP.NET Web Forms 197

Web Form Organization 198

ASPX Files 198

Code-Behind Files 198

Implementing Test-Driven Development with MVP and Web Forms 199

Working with the ASP.NET MVC 210

MVC 101 211

Microsoft ASP.NET MVC 3.0 212

Creating an ASP.NET MVC Project 212

Creating Your First Test 213

Making Yo…