What is the Coupling Pitfall and how to Avoid it?
How to avoid constant tests maintenance and regressions in your code? In this article, we will talk about a new term “the Coupling Pitfall”, what harm it is doing to your code, and a way to fix it.
Understanding Unit Tests in Javascript: 5 Frameworks
When it comes to testing, checking a single function is different from testing a complete application at once. It helps to understand the flaws in any units of the application and allows the developers to take appropriate steps.
How unit
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How we employed the new ECMAScript Module Support in typescript
What is the new standard to serve both an ECMAScript Module (ESM) as well as Commonjs in the same package? How to use it? And how to make Jest and Playwright to work with it?
When developing an npm package, …
6 Lessons Learned from Using Playwright for UI Tests
Here are 6 practical lessons learned from a production incident, ui-test coverage (using playwright) and code review.
Today we had a small incident in production – one of my teammates found out a feature in one of our component doesn’t …
5 lessons learned when I TDD an algorithm in JavaScript
How to develop an algorithm using TDD? In this article we will implement the Diamond-Square algorithm using TDD. This article was inspired by Uncle Bob’s blog post TDD Lesson – Terrain Generation.
Well, one of the things I did during …
How to test HTML5 canvas with jest?
In this short article you will learn what you need to install in order to prepare a test environment for canvas operations with jest. After finishing the article, you will be ready for some canvas testing action!
In the past …
How to create a workspace coverage report in nrwl/nx monorepo?
This is going to be a short one. I’m using nrwl/nx a LOT. I’m also testing a LOT. Lately I needed to add a coverage report to one of my nrwl/nx repositories. The coverage tool I was using needed the …
Musings about tests as documentation
This post originated from a non-english post on Linkedin. Here’s a translation of the original post:
Yes, it’s very important to me that the systems I develop are covered by tests.
In this approach I trust that external libraries that
Debug Jest in a NRWL/nx project with webstorm
Lately I’ve started a to migrate our 5 y/o code base into a NRWL/nx monorepo. I’d might write the process of choosing NRWL/nx as our tech of choice in a different post (write in the comments or message me …