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In the previous Spring Boot Testing Tutorial, we have learned how to write unit, slice and integration tests for a Spring Boot application. In this tutorial, you will learn how to configure your Spring Boot application using properties and YAML files for running the application in different environments. Externalizing Spring Boot Application Configuration Any non-trivial application will have some configuration that you would like to make it configurable instead of hard-coding those values in the application code.

In the previous Getting Started with Spring Boot tutorial, we have learned how to create a Spring Boot application and built a simple REST API. In this tutorial, you will learn how to write unit, slice and integration tests for your Spring Boot application. Testing Spring Boot applications We should write Unit Tests to verify the business logic of a particular unit(a class, a method, or a set of classes), and they shouldn’t be talking to any external services like database, queues or other webservices etc.

Introducing Spring Boot Spring Boot is the most popular framework for building applications in the Java world. Spring Boot is an Opinionated and Convention Over Configuration based approach to building Spring framework based applications. Using Spring Boot, you can build different kinds of applications such as monolithic applications, microservices, serverless applications, Batch applications, etc. Let us take a quick look at what are the key features of Spring Boot that make it so popular.

TLDR; I am happy to announce that I am starting the SpringBoot - The Missing Guide video series on my SivaLabs YouTube Channel. This SpringBoot - The Missing Guide video series is for those who need help understanding SpringBoot’s magic. In this series, I will explain the core concepts used in Spring and SpringBoot with practical examples. Also, I will give a deep-dive explanation of SpringBoot’s AutoConfiguration and how to customize the default configuration.

TLDR; I am happy to announce that I am going to create “SpringBoot Tips Video Series” on my SivaLabs YouTube Channel. This “SpringBoot Tips Series” is to help people who are new to SpringBoot to learn how to use SpringBoot with a keen focus on understanding how it works behind the scenes. Longer version I have been working with SpringBoot for several years, and I have written couple of books on it too.