Book Image

Scala Reactive Programming

By : Rambabu Posa
Book Image

Scala Reactive Programming

By: Rambabu Posa

Overview of this book

Reactive programming is a scalable, fast way to build applications, and one that helps us write code that is concise, clear, and readable. It can be used for many purposes such as GUIs, robotics, music, and others, and is central to many concurrent systems. This book will be your guide to getting started with Reactive programming in Scala. You will begin with the fundamental concepts of Reactive programming and gradually move on to working with asynchronous data streams. You will then start building an application using Akka Actors and extend it using the Play framework. You will also learn about reactive stream specifications, event sourcing techniques, and different methods to integrate Akka Streams into the Play Framework. This book will also take you one step forward by showing you the advantages of the Lagom framework while working with reactive microservices. You will also learn to scale applications using multi-node clusters and test, secure, and deploy your microservices to the cloud. By the end of the book, you will have gained the knowledge to build robust and distributed systems with Scala and Akka.
Table of Contents (16 chapters)

Testing Reactive Microservices

In this chapter, you will learn what Test-Driven Development (TDD) is, its importance, and you will learn how to unit test the components of our Scala-based Reactive web applications and Reactive microservices, using popular Scala testing frameworks.

I presume you are new to the TDD approach or know only some basics of TDD. So, initially, we will try to understand the TDD approach and the importance of TDD (unit testing) in developing web applications and microservices.

Unit testing means testing individual components of our application thoroughly. We should test each component separately and should test each and every line of code, to avoid most of the bugs. We have plenty of unit testing frameworks to test Java and Scala-based applications.

In this chapter, we will discuss the following:

  • What is TDD and unit testing?
  • The importance of the TDD...