Unit testing our code on the JVM is well catered for with a lot of great tools that are mature and reliable – things tend to just work. Integrated testing, however, is another matter. Any time we face a situation where we need to involve non-JVM elements in our tests, we’re faced with painful environment setup and repeatability issues. Testcontainers aims to make integrated tests a little less unpleasant, through the power of Docker. Databases, Web browsers – in fact anything available as a Docker image – can be made available as a component to use in our tests.
In this talk, we’ll go through the motivations for building Testcontainers, its features, as well as some examples of using it in practice for testing various types of components.