Automatic integration tests as part of the development life cycle can save a lot of time and money. Not only when dealing with other service APIs or offering some, also if the application uses a database or other infrastructure services.

We at Consol made a lot of good experience to develop the integration tests as part of the life cycle from the beginning of a project. Therefor the Citrus framework is often a good choice to do it automated.

But there are other frameworks and libraries which can be useful. In this article, we’ll have a look at Testcontainers. By using a sample microservice, we will show how Testcontainers can be used and what chances it provides.

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In a previous article we went through how to build a chat room web application that used REST and STOMP for communicating between the client and server. In this article I use the very same application and show how to write automated integration tests using the open source Citrus integration test framework.

If you haven’t read the first article don’t worry. A quick summary of all the important bits will be shown shortly below. But before I get to that lets talk a little bit about automated integration testing and citrus.

One of the biggest challenges when testing any application is being able to simulate all endpoints.

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