Book Image

Salesforce Lightning Platform Enterprise Architecture - Third Edition

By : Andrew Fawcett
Book Image

Salesforce Lightning Platform Enterprise Architecture - Third Edition

By: Andrew Fawcett

Overview of this book

Salesforce Lightning provides a secure and scalable platform to build, deploy, customize, and upgrade applications. This book will take you through the architecture of building an application on the Lightning platform to help you understand its features and best practices, and ensure that your app keeps up with your customers’ increasing needs as well as the innovations on the platform. This book guides you in working with the popular aPaaS offering from Salesforce, the Lightning Platform. You’ll see how to build and ship enterprise-grade apps that not only leverage the platform's many productivity features, but also prepare your app to harness its extensibility and customization capabilities. You'll even get to grips with advanced application architectural design patterns such as Separation of Concerns, Unit Testing and Dependency Integration. You will learn to use Apex and JavaScript with Lightning Web Components, Platform Events, among others, with the help of a sample app illustrating patterns that will ensure your own applications endure and evolve with the platform. Finally, you will become familiar with using Salesforce DX to develop, publish, and monitor a sample app and experience standard application life cycle processes along with tools such as Jenkins to implement CI/CD. By the end of this book, you will have learned how to develop effective business apps and be ready to explore innovative ways to meet customer demands.
Table of Contents (17 chapters)

Introduction to unit testing with Apex

At this stage, you're probably wondering just how it is technically possible, using code, to substitute or inject (to use the correct term) different compiled code during test execution. To illustrate the various options for dependency injection, let's start with a simple code example. We will explore how unit testing can be applied to Apex Enterprise Patterns later in this chapter.

The following diagram shows the Unified Modeling Language (UML) for a Car class model, which has been designed with SOC in mind. Responsibilities such as the engine, dashboard, and the digital readout display have been separated. This is a pure Apex code example to illustrate how dependencies between classes can be managed with dependency injection (DI):

The following code is for the Car class. It has a dependency on methods from the Dashboard and Engine...