Book Image

Accelerating Angular Development with Ivy

By : Lars Gyrup Brink Nielsen, Mateus Carniatto, Jacob Andresen
Book Image

Accelerating Angular Development with Ivy

By: Lars Gyrup Brink Nielsen, Mateus Carniatto, Jacob Andresen

Overview of this book

Angular Ivy is the latest rendering engine and compiler introduced in Angular. Ivy helps frontend developers to make their Angular applications faster, better optimized, and more robust. This easy-to-follow guide will help you get to grips with the new features of Angular Ivy and show you how to migrate your Angular apps from View Engine to Ivy. You'll begin by learning about the most popular features of Angular Ivy with the help of simple stand-alone examples and realize its capabilities by working on a real-world application project. You'll then discover strategies to improve your developer workflow through new debugging APIs, testing APIs, and configurations that support higher code quality and productive development features. Throughout the book, you'll explore essential components of Angular, such as Angular Component Dev Kit (CDK), Ahead-of-time (AOT) compilation, and Angular command line interface (CLI). Finally, you'll gain a clear understanding of these components along with Angular Ivy which will help you update your Angular applications with modern features. By the end of this Angular Ivy book, you will learn about the core features of Angular Ivy, discover how to migrate your Angular View Engine application, and find out how to set up a high-quality Angular Ivy project.
Table of Contents (14 chapters)

Enhancing tests with stronger types and new APIs

For many different types of tests, Angular's TestBed API is both necessary and useful. Ivy introduces a strongly typed API for resolving dependencies through the Angular testing module injector, which can be configured using the static TestBed.configureTestingModule method. In this section, we will explore stronger typing in Angular tests.

Let's also look at an integrated component test for an Angular component using a custom Angular Material SVG icon. This can be done using the FakeMatIconRegistry service that was introduced with Angular Ivy.

Resolving strongly typed dependencies with TestBed.inject

TestBed.get always returns a value of the any type. This static deprecated method has not been deprecated as of Angular version 12, but it could be removed in any major version following that. Its replacement is the type-safe TestBed.inject static method.

Let's look at a couple of simple examples to see the immediate...