Unnecessary Unit Tests

A "Unit" In A Test Is Not The Class Under Test

Hi,

What is actually a “Unit” in a Unit Test?

Dumb question, you might say.

But it’s an interesting one. For many years, like most people who talk about this topic, I believed:

A unit is a class that I want to test.

And maybe you saw it that way too. And you certainly had a few problems with it.

For example, the symptoms of resulting Coupling

What happens when we write a UserServiceTest class? We have - without realizing it - established a semantic coupling between the UserService class and the UserServiceTest.

Marcus Held

Why Is OOP So Popular?

Hi,

Why do we develop object-oriented today and not functionally?

Why are 7 out of 10 of the most popular programming languages object-oriented? And why is there no purely functional language among them?

Source: Stackoverflow Developer Survey 2023

This question was also asked by Richard Feldman in 2019 . And the backgrounds are interesting.

Of course - as always - it’s complicated.

But one aspect I find particularly interesting.

Marcus Held

ChatGPT Killed my Blog

Hi,

My work methods have changed more in the past year than ever before.

A year ago, OpenAI released ChatGPT.

At the time, I thought the technology was cool, but I didn’t realize how much it would impact my work. And that in less than 12 months.

Today, I use AI for so many things:

• I no longer Google questions; I ask ChatGPT
• GitHub Copilot writes code before I even know what I want to write
• My content (including this one) is proofread by ChatGPT
• I have stock images generated by Midjourney
• My recent presentations were created with ChatGPT
• Even the pirate puzzle for the children’s birthday party is generated by ChatGPT

And this list is far from complete.

Marcus Held

@Transaction Around Test

Hi,

My fingers were tingling at the start of Thorben Janssen’s session “The Big Java Persistence Q&A”.

The first question was roughly:

“In the previous talk (something with JPA), it was said that one should annotate every test with @Transactional. This will automatically roll back the data after the test. We’ve had a discussion and can’t agree. What’s your recommendation?”

Thorben’s answer made me nervous. He countered with a question of his own, also paraphrased:

Marcus Held

Kids Treasure Hunt

Hi,

For a treasure hunt for a 5-year-old, I want to write a text. The text should be written by a pirate, describing a riddle where the pirate’s treasure is hidden. It should be hidden in a place where creepy trees are. Can you write the text for me and make it rhyme?

With this prompt, I fed ChatGPT. I had just returned from Berlin from the RabbitMQ Summit .

Marcus Held