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How to migrate from Jest to node:test
Jest is one of the most populars testing frameworks for JavaScript and Node.js. Originally developed by Facebook, it’s a one-stop-shop with testing, assertions, code coverage… but this implies some critics, like requiring more than 50mb of dependencies. Also, somewhat recently was shown to be maintained mostly by a single person, being that the reason why updates and maintenance was so much slow, so they decided to transfer it to OpenJS foundation. Also there has been several long standing critics about not providing a pure environment, or the fact that Jest parses the code, leading to some complexities when needing to configure transpilation. That has lead to several people looking for alternatives, and having now a built-in test runner in Node.js, I decided to see myself how to migrate to it.
Profiling `npm install` times
When installing Mafalda packets, a problem I’ve suffered several times are install times, specially since I’m using git dependencies. I tried to reduce times by publishing some of the most common packages to npm, so removing need to install and compile development dependencies like Typescript, but still install times were huge for no reason, so I needed some way to measure the install time of each one of the dependencies. This lead out options like UNIX time command or tools like slow-deps, so just by change, I found on StackOverflow a reference to gnomon.
How to use private repositories as npm git dependencies on Github Actions
I’m advocate of automatization, and that includes not only CI/CD pipelines, but also I wanted to do it for documentation publishing. Mafalda is split in a lot of packages (currently more than 30!), so I wanted to have a single place where to publish the documentation of all of them. Github Pages allows to host a website for your organization or username for free (this blog and personal site already makes use of it), and it can also host automatically a website for each repository as sub-paths of your username/organization main website. Problem is, that it only works for open source repositories or for paid plans, and most of the Mafalda SFU repositories are private ones. So since the Mafalda SFU project website is already hosted on Github Pages as a public repository, I decided to store and serve from it all the other repositories documentation as well… doing it in an automated way :-)
WebRTC Bugs and Where to Find Them
Also for the most basic use cases, WebRTC is a complex technology, with lots of moving parts and involved elements and parties working together at the same time, so when a WebRTC connection is not working properly, or directly it can not be created, there’s a series of not-so-obvious usual reasons that can make it fail. We are going to analyze some of the most common ones, and when possible, see how we can fix them or find some alternatives solutions to minimize their impact.
How to (properly) deploy Node.js applications
Recently I’ve been involved in a new Typescript project all of my own where I would end up deploying it on production on a raw AWS machine, so no help from dev friendly PaaSs environments, as I usually prefer to work.
Linting @ Dyte
At Dyte we are now 44 persons, most of them developers, and each one has his own personal code style. This has lead sometimes to huge code conflicts when doing merges that create some annoyances and delays, so we decided to create an unified linting code style for all of Dyte projects (including a Jira ticket too!), just only we have been procrastinating it due to some other priorities. So, after the last merge conflict in a new project just created some days before, we decided to fix that issue once for all. Come and follow us to see how at Dyte we take code quality serious, and how at Dyte we don’t just simply apply a linter to our source code.
Mediasoup prebuilds
At https://github.com/versatica/mediasoup/pull/777 (the lucky number :-D) I’ve
published a PR that allows to create and use prebuild images of mediasoup, not
needing to compile it at install on the target platform. This is done by
compiling the Worker executables in advance for multiple platforms, and bundling
them in the distributed package.
How to use a different email for a group of git repositories
If you have a folder with multiple repositories that you want your commits use a different email account, but keep using your (personal) one for anything else, you can do it in two steps:
Use Ssh For Github Https Urls
Git can be configured to use SSH in place of HTTPS for URLs matching a given
prefix. To use SSH for all GitHub access, add these lines to ~/.gitconfig:
[url "ssh://git@github.com/"]
insteadOf = https://github.com/
How to do proper exceptions handling
An exception happens when something we expected that should happen, didn’t. We can log them, but printing logs everywhere add a lot of noise, so it’s better to throw errors and handle them in upper levels. Also, a thrown error is easy to check and test, but a log message is not, so they are better for unit testing.