Clean Tests

Clean Test Automation Monthly 1 / 2024

The Clean Test Automation Monthly is a monthly blog post that highlights the best test automation content which I read during the current month. This blog post highlights the best test automation content of January 2024. Read More

Writing Clean Tests - Java 8 to the Rescue

In the previous part of this tutorial we solved some common problems found from “clean” unit tests by using nested configuration. I was very happy with the final test class, but after a while I realized that something was bothering me. The only problem was that I couldn’t figure out what it was. I ignored […] Read more

Writing Clean Tests - Small Is Beautiful

We have learned that "clean" unit tests might not be as clean as we think. We have done our best to make our unit tests as clean as possible. Our tests are formatted properly, use domain-specific language, and avoid excessive mocking. Nevertheless, our unit tests are not clean because: When we make changes to the […] Read more

Writing Clean Tests - Trouble in Paradise

If our code has obvious faults, we are very motivated to improve it. However, at some point we decide that our code is "good enough" and move on. Typically this happens when we think that the benefits of improving our existing code are smaller than the required work. Of course, if we underestimate our return […] Read more

Writing Clean Tests - To Verify Or Not To Verify

When we write unit tests that use mock objects, we follow these steps: Configure the behavior of our mock objects. Invoke the tested method. Verify that the correct methods of our mock objects were invoked. The description of the third step is actually a bit misleading, because often we end up verifying that the correct […] Read more

Writing Clean Tests - Divide and Conquer

A good unit test should fail for only one reason. This means that a proper unit test tests only one logical concept. If we want to write clean tests, we have to identify those logical concepts, and write only one test case per logical concept. This blog post describes how we can identify the logical […] Read more