Writing Effective Unit Tests for Angular Components, Services, and Directives

In this chapter, we’re going to dive into the art of writing effective unit tests for Angular components, services, and directives. We’ll dive into writing unit tests for Angular components, continuing what we started in the previous chapter. Components are the building blocks of Angular applications, and it’s crucial to test them thoroughly. In this chapter, we’ll learn how to set up test environments, create component instances, and test component properties, methods, and event handling. We’ll also explore techniques for testing component models, including DOM manipulation and event simulation.

We’ll also be focusing on unit testing Angular services. Services play an essential role in Angular applications, providing reusable logic and data manipulation. We’ll learn how to create service instances, simulate test service methods, and carry out data manipulation...