JUnit 5 – Parameterized Tests

JUnit 5 is pretty impressive, particularly when you look under the covers, at the extension model and the architecture. But…

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Mocking Spring Security Context for Unit Testing

Today, while writing unit test case for one of the Java method which looks like below: public ApplicationUser getApplicationUser() { ApplicationUser…

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Boosting test performance with TestContainers

In my previous post on testing, I described how to use TestContainers to provide realistic test environments for database tests.…

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Single Statement Unit Tests

Many articles and books have already been written about unit testing patterns and anti-patterns. I want to add one more…

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Importance of given-when-then in unit tests and TDD

Recently, I’ve been writing rather about more advanced concepts related to automatic testing (mostly related to Spock). However, conducting my…

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Automated Tests for Asynchronous Processes

It’s been a while since I’ve worked on a server-side application that had asynchronous behaviour that wasn’t already an event-driven…

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Every project is test driven in the end

Let me give you the punch-line and then explain myself: As soon as testing starts every “project” becomes a test…

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Never trust a passing test

One of the lessons when practising TDD is to never trust a passing test. If you haven’t seen the test…

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Expected Exception Rule and Mocking Static Methods – JUnit

Today I was asked to consume a RESTful service so I started implementing it following Robert Cecil Martin’s rules for…

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