Book Image

Building Applications with Spring 5 and Kotlin

By : Miloš Vasić
Book Image

Building Applications with Spring 5 and Kotlin

By: Miloš Vasić

Overview of this book

Kotlin is being used widely by developers because of its light weight, built-in null safety, and functional and reactive programming aspects. Kotlin shares the same pragmatic, innovative and opinionated mindset as Spring, so they work well together. Spring when combined with Kotlin helps you to reach a new level of productivity. This combination has helped developers to create Functional Applications using both the tools together. This book will teach you how to take advantage of these developments and build robust, scalable and reactive applications with ease. In this book, you will begin with an introduction to Spring and its setup with Kotlin. You will then dive into assessing the design considerations of your application. Then you will learn to use Spring (with Spring Boot) along with Kotlin to build a robust backend in a microservice architecture with a REST based collaboration, and leverage Project Reactor in your application. You’ll then learn how to integrate Spring Data and Spring Cloud to manage configurations for database interaction and cloud deployment. You’ll also learn to use Spring Security to beef up security of your application before testing it with the JUnit framework and then deploying it on a cloud platform like AWS.
Table of Contents (12 chapters)

Testing Spring REST applications

In this section, we will continue towards test implementation and will be testing Spring-specific topics. First of all, we will specify the SprintRunner class, which is going to be used as the test runner for our tests:

package com.journaler 
 
import org.junit.After 
import org.junit.Before 
import org.junit.Test 
import org.junit.runner.RunWith 
import org.springframework.test.context.junit4.SpringRunner 
 
@RunWith(SpringRunner::class) 
class NoteTest { 
    ... 
} 

By annotating @RunWith(SpringRunner::class), we specified that SpringRunner will be used for test running and will be initializing TestContextManager to provide Spring testing functionality to standard tests. Let's run the test once more. Observe the output in the following screenshot:

As you can see, Spring Framework is being used to support the test we just run.

As we already...