Fault Injection with Byteman and JUnit

The time when our applications lived in isolation have passed long-long ago. Nowadays applications are a very complicated beasts talking…

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Running JUnit Tests Repeatedly Without Loops

Recently I came across a problem where I had to write tests for a method that calculates randomly distributed values…

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JUnit: Naming Individual Test Cases in a Parameterized Test

A couple of years ago I wrote about JUnit Parameterized Tests. One of the things I didn’t like about them…

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JUnit and EasyMock cooperation

Developers always need to take care about code which they produced. They should be ensured that code works properly after…

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Testing Expected Exceptions with JUnit Rules

This post shows how to test for expected exceptions using JUnit. Let’s start with the following class that we wish…

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Don’t rely on unit tests alone

When you are building a complex system, barely testing components in isolation is not enough. It’s crucial, but not enough.…

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Hamcrest Containing Matchers

The Hamcrest 1.3 Javadoc documentation for the Matchers class adds more documentation for several of that class’s methods than were…

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JUnit test method ordering

Junit until version 4.10 uses the order of test methods in a test class as returned by the reflection API…

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Using Builder Pattern in JUnit tests

This is not intended to be a heavily technical post. The goal of this post is to give you some…

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