Book Image

Test-Driven Development with PHP 8

By : Rainier Sarabia
Book Image

Test-Driven Development with PHP 8

By: Rainier Sarabia

Overview of this book

PHP web developers end up building complex enterprise projects without prior experience in test-driven and behavior-driven development which results in software that’s complex and difficult to maintain. This step-by-step guide helps you manage the complexities of large-scale web applications. It takes you through the processes of working on a project, starting from understanding business requirements and translating them into actual maintainable software, to automated deployments. You’ll learn how to break down business requirements into workable and actionable lists using Jira. Using those organized lists of business requirements, you’ll understand how to implement behavior-driven development (BDD) and test-driven development (TDD) to start writing maintainable PHP code. You’ll explore how to use the automated tests to help you stop introducing regressions to an application each time you release code by using continuous integration. By the end of this book, you’ll have learned how to start a PHP project, break down the requirements, build test scenarios and automated tests, and write more testable and maintainable PHP code. By learning these processes, you’ll be able to develop more maintainable, and reliable enterprise PHP applications.
Table of Contents (17 chapters)
Part 1 – Technical Background and Setup
Part 2 – Implementing Test-Driven Development in a PHP Project
Part 3 – Deployment Automation and Monitoring

Polymorphism in OOP

Polymorphism means many shapes or many forms. Polymorphism is achieved through the inheritance of a PHP abstract class, as well as by implementing PHP interfaces.

Polymorphism helps you create a format or a standard for solving a specific problem programmatically, instead of just focusing on a single implementation of a solution.

How do we apply this in PHP and what benefit do we get in using this feature? Let’s take the example codes in the following subsections as an example, starting with a PHP abstract class.

Polymorphism with a PHP abstract class

When using abstract classes in PHP, we can implement polymorphism by using abstract functions. The following example is of a PHP abstract class:


namespace Animals\Polymorphism\AbstractExample;
abstract class AbstractAnimal
    abstract public function makeSound();

Every PHP abstract class ideally should start with the Abstract prefix,...