In this tutorial, we will go through the steps for testing Angular Component by using the Jest framework.
Since Angular is a widely used front-end application development framework, it is the responsibility of each developer to make sure that the components are implemented as per the requirements of the project.
Unit Testing is one of the recommended approaches of guaranteeing the quality of the application.
What is Unit Testing?
Unit testing is an approach of software testing where individual units of the code are tested against the test data. The purpose of unit testing is to validate that each unit of the software performs operations as per expectations. Unit testing involves the lowest cost because each test targets to a limited scope. Unit tests are fast and less time consuming.
Understanding the Angular Testing Object Model
One of the best advantages of using Angular is that it provides the Testing Objects model. Now the question is why is this so important?
The reason behind this is the execution of an Angular application. The Angular application is executed using the NgModule environment configuration. This means that, all components and their dependencies e.g. standard module like FormsModule and other Angular Services, are finally managed by NgModule; so naturally when we try to test the component, we need a similar environment to instantiate component with its dependencies.
