Working Effectively with Legacy Code

Contents

Foreword by Robert C. Martin

Preface

Introduction

PART I: The Mechanics of Change

Chapter 1: Changing Software

Four Reasons to Change Software

Risky Change

Chapter 2: Working with Feedback

What Is Unit Testing?

Higher-Level Testing

Test Coverings

The Legacy Code Change Algorithm

Chapter 3: Sensing and Separation

Faking Collaborators

Chapter 4: The Seam Model

A Huge Sheet of Text

Seams

Seam Types

Chapter 5: Tools

Automated Refactoring Tools

Mock Objects

Unit-Testing Harnesses

General Test Harnesses

PART II: Changing Software

Chapter 6: I Don’t Have Much Time and I Have to Change It

Sprout Method

Sprout Class

Wrap Method

Wrap Class

Summary

Chapter 7: It Takes Forever to Make a Change

Understanding

Lag Time

Breaking Dependencies

Summary ...