Programming: openQA and Microsoft's EEE of JavaScript
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There can never be enough testing
As you may already know (if you don’t, please check these older posts) openQA, the automated testing system used by openSUSE runs daily tests on the latest KDE software from git. It works well and uncovered a number of bugs. However, it only tested X11. With Wayland starting to become usable, and some developers even switching to Wayland full time, it was a notable shortcoming. Until now.
Why would openQA not run on Wayland? The reason lies in the video driver. openQA runs its tests in a virtual machine (KVM) which uses the “cirrus” virtual hardware for video display. This virtualized video card does not expose an interface capable of interfacing with the kernel’s Direct Rendering Manager (DRM), which is required by kwin_wayland, causing a crash. To fix it, “virtio”, which presents a way for the guest OS to properly interface with the host’s hardware, is needed. Virtio can be used to emulate many parts of the VM’s hardware, including the video card. That would mean a working DRM interface, and a working Wayland session!
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TypeScript: Our Type of JavaScript [Ed: Microsoft lock-in]
Every front-end developer has had the frustrating experience of delving backwards through a code base for a bug fix to determine what, exactly, a mysterious var is defined as. Ensuring types between components cuts off these time-consuming issues before they occur. It helps reduce the margin for error and improves readability, allowing the opportunity to create elegant JavaScript with minimal runtime errors. Which brings us to TypeScript—a superset of JavaScript that lets you add in strongly-typed classes to your front-end application.
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Developed by Microsoft, TypeScript is an open-source language and compiler that runs both in the browser (through SystemJS with transpiling on the fly) and on NodeJS. Its intention is to address JavaScript’s shortcomings for large-scale application development.
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