As more and more companies migrate from Java to JavaScript for UI and API testing, I decided to study it too. After all, even this blog is powered by React. One of the features I sometimes used in Java is function overloading, which I thought wasn't possible in JavaScript. However, as I've recently learned, TypeScript adds this functionality. Well, kind of.
When I created raweceek.eu last year, I quickly decided to build it with React due to my familiarity with the library. However, over time I realized that using so much client-side code for such a simple website was silly. It was like using a sledgehammer to crack a nut. Even worse, older systems couldn’t display the page because browsers like IE6 and its predecessors don’t support contemporary JavaScript features. So I decided to change that.
Playwright is a relatively new automation library for browser testing. Despite that, it has already gained some user base, with articles and tutorials regularly appearing on Software Testing Weekly. It comes with many features necessary for UI tests, but crucially, it can also work with API requests made by the web app under test. This allows us to either completely mock responses from a backend server, or alter them - depending on what we want to achieve. In this post, I will show how to do both things in Java.
