Now the fun part. Assuming that we have built a running microservice environment, how can we maintain it? How do we introduce changes without breaking it? How do we test it? We know we can do end to end tests, but these are slow and we need faster feedback. How can we test the microservice… Continue reading Testing microservices
As Junit 5 was released in order to be able to use mocks you need to add the mockito extension. You noticed that ClassRunners are deprecated now in Junit 5, they were replaced with extensions, hence the Mockito Extension. What changes are in Mockito 2? Well one of the most important one is the change… Continue reading Mockito 2
After we have written the code and compile it, the next step is to build and deploy it somewhere. We can go two ways here: build many times the code, deploy it many times build once the code, deploy it many times Build many This is the way many of you are familiar with, as… Continue reading Build once vs build many
What is stubbing? What is verifying? Do we need both? If we look into the java docs for Mockito.when() (stubbing) and Mockito.verify() (verifying behavior) we see something strange that is common to both: Although it is possible to verify a stubbed invocation, usually it's just redundant. Well, we known that the difference between stubs and… Continue reading Are you verifying your stubs?
What has changed? Is it still backwards compatible? Is it hard to migrate? These are some of the questions I want to answer with this post. Junit 5 is a bundle of 3 modules: platform, a platform for developing testing frameworks jupiter, the new programming model and extension model vintage, for running Junit 3 and… Continue reading Junit 5
Theories are less known components of Junit, but lately I used them and thus decided to write about them. They come in handy when you have a situation when you need to test a behavior with multiple input values. Instead of writing tests for each situation you can specify a set of inputs and apply… Continue reading Junit Theories
Let's get to some interesting stuff. How difficult is to test your concurrent code? The answer: very. Still there must be some ways of testing it, right? Well there are things that can help you. One of them is Thread Weaver. How does it work? Using byte-code instrumentation it will run your method that you… Continue reading Testing concurrent code