Name: Test-Driven Database Development: Unlocking Agility
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Author: Max Guernsey
ISBN: 9780321784124

Test-Driven Database Development: Unlocking Agility (häftad)

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Format: Häftad (Paperback)
Språk: Engelska
Antal sidor: 352
Utgivningsdatum: 2013-03-13
Upplaga: 1
Förlag: ADDISON-WESLEY
Illustrationer: illustrations
Dimensioner: 231 x 175 x 23 mm
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Antal komponenter: 1
ISBN: 9780321784124

The practice of Test-Driven Development (TDD) has helped thousands of software developers improve quality, agility, productivity, and speed. In Test-Driven Database Development, Max Guernsey, III shows how to adapt TDD to achieve the same powerful benefits in database design and development.

Guernsey first explains why TDD offers so much potential to database practitioners, and how to overcome obstacles such as the lack of conventional testable classes. Youll learn how to use classes of databases to manage change more effectively; how to define testable database behaviors; how to maximize long-term maintainability by limiting a databases current scope; and how to use emergent design to simplify future expansion.

Building on this foundation, the author guides you through implementing modern TDD processes and database refactoring. He presents practical techniques for improving legacy databases; for deviating from strict TDD when necessary; and for adapting TDD to applications that persist data in file systems, XML, or serialized objects. Guernsey shows how to

Build a simple infrastructure to track and standardize scripts and databases
Define a sustainable TDD process for database design
Safely change a design without losing data
Design new databases that are lighter, leaner, simpler, more testable, and easier to change
Reduce design costs by eliminating duplication
Gradually bring the benefits of TDD, agility, and modern design to legacy databases
Remediate errors that find their way into database designs
Isolate behaviors and avoid unwanted dependencies that cause tests to fail

With this book as a guide, you will learn how to apply the proven practice of TDD to your database needs, and organize and optimize your organizations data for a significant competitive advantage.
Test-Driven Database Development is the newest title in the highly respected NetObjectives Lean-Agile Series.

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Max Guernsey is currently a Managing Member at Hexagon Software LLC. He has fifteen years of experience as a professional software developer. For nearly half that time, he has been blogging, writing, and delivering lectures on the topic of agile and test-driven database development.

Foreword    xvii
Preface    xix
Acknowledgments    xxv
About the Authors    xxvii

Chapter 1 Why, Who, and What    1
Why    1
   Agility Progressively Invades Domains Every Day 2
   Agility Cannot Work Without TDD 2
   TDD in the Database World Is a Challenge 3
Who 3
   TDD and OOP 4
   Applications and Databases 4
What 4
   Databases Are Objects 5
   TDD Works on Classes, Not Objects 5
   We Need Classes of Databases 6
Summary 7

Chapter 2 Establishing a Class of Databases 9
The Classs Role in TDD 9
   A Reliable Instantiation Process 10
   Tests Check Objects 10
Classes in Object-Oriented Programming Languages 11
   Making Classes Is Easy: Just Make New Objects 11
   One Path: Destroy If Necessary 11
Classes of Databases 12
   Two Paths: Create or Change 12
   The Hard Part: Unifying the Two Paths 13
   Real Database Growth 13
   How About Making Every Database Build Like Production Databases? 14
   All DBs Would Follow the Exact Same Path 15
Incremental Build 15
   Document Each Database Change 15
   Identify Current Version 16
   Apply Changes in Order as Needed 16
Implementation 16
   Requirements 16
   Pseudocode Database Instantiation Mechanism 17
   Pseudocode Input 17
Summary 18

Chapter 3 A Little TDD 19
The Test-First Technique 19
   Write the Test 20
   Stub Out Enough to See a Failure 22
   See the Test Pass 22
   Repeat 23
Tests as Specifications 24
   Tests Arent Tests, They Are Specifications 24
   Tests Arent Specifications, They Are Tests 25
   Tests Are Executable Specifications 26
   Incremental Design 27
Building Good Specifications 28
   Specify Behavior, Not Structure 28
   Drive Design In from Without, Not the Other Way Around 29
   Defining the Design Inside Out 30
   Defining the Design Outside In 32
Summary 34

Chapter 4 Safely Changing Design 37
What Is Safe? 38
   Breaking a Contract Is a Little Bad 38
   Losing Data Wi...