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Ability to write good unit tests is an important feature of any developer. But how to understand that your unit tests are correct? Good unit test is like a good chess game. In our case chessmen are the approaches which we are going to discuss in this post. There is no best chessman in a chess game because everything depends on the positions (and a player). Likewise, in unit testing you don't have to distinguish only one approach. In other words, you should use all approaches together to get the best result. So, if you want to win this game, then welcome under the cut.

10 Tips for Being a Good Tech Lead

Just about the fastest portable 64-bit hash function with decent quality.

This is a translation of the original article by Leonid Yuriev.

Иногда молодые команды разработки охватывает неразбериха.

Это случается в тот момент, когда они ещё не до конца разобрались, что такое эджайл; проджект и продакт спорят, кто из них кто, а задачи каждый ведёт сам по себе. Или все уже всё знают, но планировать спринты не получается — задачи не прорабатываются, демо и ретро проходят нерегулярно.

У нас тоже была похожая история, но мы нашли свой путь.

Это рассказ от команды личного кабинета Яндекс.Кассы, и подробнейшая инструкция для тех, кто хочет улучшить своё планирование.

Как всё было

There are new challenges that force IT companies to look for non-trivial approaches to solve the problems of their customers every year.  And as you know LANIT-Integration is not an exception. Our team has already managed to work with many products, but we never stop discovering new ones.

In this article I would like to provide an overview of backup and recovery software from Chinese vendors and to compare these solutions with domestic ones.

The year 2021 started on such a high note for Qrator Labs: on January 19, our company celebrated its 10th anniversary. Shortly after, in February, our network mitigated quite an impressive 750 Gbps DDoS attack based on old and well known DNS amplification. Furthermore, there is a constant flow of BGP incidents; some are becoming global routing anomalies. We started reporting in our newly made Twitter account for Qrator.Radar.

Nevertheless, with the first quarter of the year being over, we can take a closer look at DDoS attacks statistics and BGP incidents for January - March 2021.

__int128 add1(__int128 a, __int128 b) {
    return b + a;
}

Last October, I made the first demoscene production after an almost two-decades-long break — a demo for PICO-8 fantasy console “PICOCHAK: Attack of Donuts.” This article is “behind the scenes” or PICOCHAK.

A few days ago 0xd34df00d has published the translation of the article, describing the possible information about some function if we use it as a "black box", not trying to read its implementation. Of course, this information is quite different from language to language; in the original article, four cases were considered:

• Python — dynamic typing, almost no information from signature, some hints are gained by the tests;
• C — weak static typing, a little more information;
• Haskell — strong static typing, with pure functions by default, a lot more information;
• Idris — dependent typing, compiler can prove the function correctness.

"Here's C and there's Haskell, and what about Rust?" — this was the first question in the following discussion. The reply is here.