Alexey Golub

Fakes > Mocks! Post: https://tyrrrz.me/blog/fakes-over-mocks Previous HN Discussion on the above post: https://news.ycombinator.com/item?id=24770954 This does require dependency injection (DI), and my hot take is that manual DI > framework magic. Sure it's a little extra code writing, but folks should optimize for reading code, and some of the frameworks out there have a lot of complex concepts for DI (For example dagger is a popular DI framework for JVM, and the dev-guide has a lot of stuff in it, which feels like a lot to learn for what it's providing: https://dagger.dev/dev-guide/, no knock against dagger, I've ran into this with other DI frameworks too!)

> poor test coverage Yet you don't have to hang around here long to be told that "Unit Testing is Overrated": https://tyrrrz.me/blog/unit-testing-is-overrated

My gut reaction to the title was to disagree. Looking at the article, the thing that stands out strongest is this graph: https://tyrrrz.me/static/b606743d039cfb56391c5793d0dda8f2/bb630/Test-c… It shows test cost vs test isolation. I agree with the assumed correlation. My experience though is the real correlation is above the assumed correlation, not below it. My guess is that the author's organization moves part of the cost somewhere else where the author doesn't have to see it. At the start of my career, I was one of those people who had this cost dumped on them so that the devs could ignore it: I was an on-team QA engineer.

Inside the source of the Javascript player (base.js) was a function to transform (update) the value of the video signature (s) parameter. All you had to do was look at base.js and duplicate the string operations used to produce the updated s, whatever they were. No need to use Javascript. yt-dl chose to use Python. Only a minority of videos used this "technological measure". Most videos on YT do not require a continually updated s; the value of s stays the same. 2017: https://tyrrrz.me/blog/reverse-engineering-youtube 2015: https://github.com/bitnol/CipherAPI 2014: https://gist.github.com/kl/9070523 2014: https://api.w3hills.com/ytcipher Regarding the "bookmark" comment, there is no way to "bookmark" any YT download URL because all YT download URLs (not just ones that have a changing signature) include timestamps; as is typical of download URLs on video sites, they have an expiration. Generating URLs that expire is not done as a means of copyright-related "access control"; the purpose has to do with caching.