Book Image

Hands-On Reactive Programming in Spring 5

By : Oleh Dokuka, Igor Lozynskyi
Book Image

Hands-On Reactive Programming in Spring 5

By: Oleh Dokuka, Igor Lozynskyi

Overview of this book

These days, businesses need a new type of system that can remain responsive at all times. This is achievable with reactive programming; however, the development of these kinds of systems is a complex task, requiring a deep understanding of the domain. In order to develop highly responsive systems, the developers of the Spring Framework came up with Project Reactor. Hands-On Reactive Programming in Spring 5 begins with the fundamentals of Spring Reactive programming. You’ll explore the endless possibilities of building efficient reactive systems with the Spring 5 Framework along with other tools such as WebFlux and Spring Boot. Further on, you’ll study reactive programming techniques and apply them to databases and cross-server communication. You will advance your skills in scaling up Spring Cloud Streams and run independent, high-performant reactive microservices. By the end of the book, you will be able to put your skills to use and get on board with the reactive revolution in Spring 5.1!
Table of Contents (12 chapters)

Testing WebFlux

In this section, we are going to cover additions that were introduced for the verification of WebFlux-based applications. Here, we will focus on checking the modules' compatibility, application integrity, exposed communication protocols, external APIs, and client libraries. So it is not about simple unit tests anymore, but more about the component and integration testing.

Testing Controllers with WebTestClient 

Imagine that we test a Payment service. In this scenario, suppose that the Payment service supports the GET and POST methods for the /payments endpoint. The first HTTP call is responsible for retrieving the list of executed payments for the current user...