In the world of Angular applications, testing is key to protect against regressions and validating functionality. With apps becoming more reactive with observables, testing how these independent pieces work becomes more important. Learn how these testing patterns and practices will ease the burden of testing your Angular application. From unit testing presentation components, integration testing with smart components, testing observables, state management, and end-to-end tests, you can use these strategies to make your testing your reactive application easier and to simplify your testing triangle.