Book Image

Agile Technical Practices Distilled

By : Pedro M. Santos, Marco Consolaro, Alessandro Di Gioia
Book Image

Agile Technical Practices Distilled

By: Pedro M. Santos, Marco Consolaro, Alessandro Di Gioia

Overview of this book

The number of popular technical practices has grown exponentially in the last few years. Learning the common fundamental software development practices can help you become a better programmer. This book uses the term Agile as a wide umbrella and covers Agile principles and practices, as well as most methodologies associated with it. You’ll begin by discovering how driver-navigator, chess clock, and other techniques used in the pair programming approach introduce discipline while writing code. You’ll then learn to safely change the design of your code using refactoring. While learning these techniques, you’ll also explore various best practices to write efficient tests. The concluding chapters of the book delve deep into the SOLID principles - the five design principles that you can use to make your software more understandable, flexible and maintainable. By the end of the book, you will have discovered new ideas for improving your software design skills, the relationship within your team, and the way your business works.
Table of Contents (31 chapters)
Free Chapter
1
Section 1
7
Section 2
13
Section 3
19
Section 4
25
Chapter 21
28
License: CyberDojo

Principles

In the beginning, Test Doubles became popular as an instrument for isolating tests from third-party libraries. Despite that being one of its use cases, and still very useful, it is not the only one and perhaps not the most important.

To attain good object-oriented design, the Test Doubles technique leverages Test-Driven Development by guiding the composition of a coherent, well-encapsulated system of types within a code base. By focusing on behavior instead of data, Test Doubles leads developers to think about object interactions early, identifying the public interfaces first. This focal point switch in the way tests are created is crucial in finding optimal object compositions.

Command-Query Separation

Command-Query Separation or CQS is a principle that states that a software interface abstraction is designed with two types of methods. One method type is known as a Command method, and the other method type is known as a Query method:

Note

Vaughn Vernon, Really...