Simon Harrer: Combine State and Behavior (Java by Comparison)

2020-01-13

In this interview, Simon Harrer shows you how code becomes more readable when you do not separate state and behavior.

Read More...

Tim Bourguignon: Mentoring Rocks

2020-01-08

Tim Bourguignon, agile coach and “chief learning officer” at Mathema, talks about one of his favorite topics: Mentoring.

Read More...

Simon Harrer: Name Things Right (Java by Comparison)

2020-01-06

Simon Harrer and I talk about the chapter “Name Things Right” from his book “Java by Comparison”.

Read More...

React TDD 4: TDD a Well-Known Algorithm

2019-12-08

When you already know the algorithm you want to implement, why should you use test-driven development to write it? And how do you test-drive a known algorithm or formula?

Read More...

React TDD 3: Dependency Injection

2019-12-03

Why doesn’t React come with dependency injection? Short answer: Because it doesn’t need it and also because it is not its responsibility.

But how do you isolate your components during testing then? How do you achieve inversion of control for dependencies when you do not have a dependency injection container?

Let’s have a look…

Read More...

Our Employees Should Learn on their Own!

2019-11-25

Some years ago I was talking to the technical lead of a medium-sized company. I told them that I had just taught a 2-day training about the new features of Java 8 to two teams at a very large company.

He said: “I will never understand why those large companies spend money on training something like that. Like, language features! I expect my employees to learn those on their own, out of curiosity!”

Two people sitting in front of a computer, studying

Read More...

React TDD 2: Value and Cost of Tests

2019-11-18

When test-driving a UI, should I test whether the text of the start button is “Start”? What about the CSS class or style of the button? It’s disabled state?

Of all the possible tests I could write, which are the ones that bring value? Which ones would get in my way later if I wrote them?

Read More...

React TDD Part 1: Testing the UI Itself

2019-11-11

Can you test-drive the UI of a web application? And why would you even want to?

With React and some extra tools, testing at least some aspects of the UI is easy. Let’s take a look…

Read More...

React TDD Part 0: All Posts

2019-11-11

Can you do test-driven development with React? Can you test-drive the UI itself? And why would you even want to?

With React and some extra tools, testing at least some aspects of the UI is easy. In this video series, I’ll show you how.

Read More...

Brain Based Training

2019-11-09

Earlier this autumn, I attended the “Training from the Back of the Room (TBR) Certified Practitioner” training and then I also became a certified trainer for TBR. After the “certifed course”, to be allowed to run “TBR Certified Practitioner” trainings, we had to complete some writing assignments.

My first assignment was:

A fellow trainer who is a colleague and friend of yours has asked for your help in designing and delivering a new course. But your friend has no idea how to use brain-based training design and delivery strategies. How would you help your friend get started? What information would you consider crucial for your friend's success and how would you explain this information to him/her?

And here is what I wrote…

Read More...