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Spring 5.0 Cookbook

Spring 5.0 Cookbook

By : Sherwin John C. Tragura
3.5 (2)
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Spring 5.0 Cookbook

Spring 5.0 Cookbook

3.5 (2)
By: Sherwin John C. Tragura

Overview of this book

The Spring framework has been the go-to framework for Java developers for quite some time. It enhances modularity, provides more readable code, and enables the developer to focus on developing the application while the underlying framework takes care of transaction APIs, remote APIs, JMX APIs, and JMS APIs. The upcoming version of the Spring Framework has a lot to offer, above and beyond the platform upgrade to Java 9, and this book will show you all you need to know to overcome common to advanced problems you might face. Each recipe will showcase some old and new issues and solutions, right from configuring Spring 5.0 container to testing its components. Most importantly, the book will highlight concurrent processes, asynchronous MVC and reactive programming using Reactor Core APIs. Aside from the core components, this book will also include integration of third-party technologies that are mostly needed in building enterprise applications. By the end of the book, the reader will not only be well versed with the essential concepts of Spring, but will also have mastered its latest features in a solution-oriented manner.
Table of Contents (14 chapters)
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Testing Reactive data transactions


Using the Spring Test framework, Reactive Stream events can be tested using reactor.test.StepVerifier which contains all the expectations and verifications needed to validate whether the output Stream data complies with the expected result or if the event is not properly composed of the appropriate operators.

Getting ready

Open the same ch07 project and create a number of test cases depicting the use of StepVerifier.

How to do it...

Aside from typical @Test execution, Reactive Stream has a dedicated API called StepVerifier, which can be used to verify if its Stream emission is appropriate for a certain requirement. Let us use the following steps to test Reactive Stream operations:

  1. StepVerifier is part of the Reactor Core add-ons so add this dependency to pom.xml:
<dependency> 
    <groupId>io.projectreactor.addons</groupId> 
    <artifactId>reactor-test</artifactId> 
    <version>3.0.7.RELEASE</version> 
     <scope...

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