Angular testing refers to the process of testing Angular applications to ensure that they behave as expected. It involves testing both the core application logic and user interface components to ensure the app is stable and functional. Angular has a built-in testing framework, but developers often seek out enhanced tools and libraries to simplify and speed up the process. One of the most powerful tools for testing Angular components is Jest. Jest allows you to run unit tests, snapshot tests, and more, with minimal configuration and maximum speed. https://testomat.io/blog/angular-component-testing-with-jest/