personal blog by Michael Krasnov
This post is part of my series on unit testing with Jest in React Native. You can find the introduction here.
In the previous parts, I went through why unit testing is vital and how to test your components using snapshots. While snapshot testing is effective, it fails to test some aspects of the component. Now I would like to talk about more advanced component testing in react native.
read more “Advanced testing in React Native with Jest: Components”This post is part of my series on unit testing with Jest in React Native. You can find the introduction here.
While unit testing your code with Jest, you may come across a time when you have to emulate a certain function. For example, the fetch function that performs HTTP requests, or some hardware-related routines. In such cases, you have to use mocking. Thankfully, jest supports various mocking styles out of the box.
read more “Advanced testing in React Native with Jest: Mocking”React Native allows developers to develop mobile applications easily, and that means testing is more important than ever. You should test the code you write for a number of reasons, most importantly, to ensure that it actually works. In this article, I will explain some principles of unit testing and show you how it is done in React Native.
read more “Testing React Native apps with Jest”With the rise of WebAssembly, the number of things we can do with a browser increased rapidly. One example is Blazor, a new web framework from Microsoft. It allows you to write websites in C# with the full power of .NET.
read more “Run C# in browsers with Blazor”Github ranked Python to be #2 most popular programming language in 2019. It is praised for being concise, easy to learn and use, rich in features. In addition, Python and R are to-go languages for data science applications. Python 3.8 was released in October of 2019 and here are the new exciting features that came with it:
read more “Python 3.8 released: what’s new”Facebook started developing GraphQL in 2012 and released it in 2015. Since 2018, the Linux Foundation is responsible for the project. GraphQL’s purpose is to provide a query language for data fetching and manipulation. It is not exactly SQL, and not REST, either. It is somewhere in between, allowing developers to query, mutate and organize data in an intuitive and safe way.
read more “What exactly is GraphQL?”One of the most important things you should consider when developing a mobile app is how it communicates with external services. Usually, your code sends HTTP requests to do it. In this article, you will learn how to send HTTP requests in Flutter.
read more “Sending HTTP requests in Dart (Flutter)”If I ask you, what browser you are using, you would probably answer Google Chrome. Indeed, its market share as of 2019 is about 70%. But if we take into consideration all Chrome-like browsers (Opera, Edge, Yandex Browser, etc.) it sums up to about 80%. It sounds perfect for web developers: fewer browser engines means less time spent making your website look consistent across browsers. But is it really?
read more “Browser engine diversity or Internet Of Google”Free and open-source software (FOSS) plays a very important part of our lives. It powers most of the websites, 90% of server infrastructure runs on it, even our phones use an open-source kernel under the hood. But how does that work and what can you do to contribute?
read more “Want to contribute to open-source? Start here”In August of 2016, Google published a project on GitHub codenamed Fuchsia (now moved here). Google made no official announcement, but code inspection suggested this was a brand-new operating system. Why does Google take on to develop a new OS instead of perfecting Android? What it means for developers and when should we expect it?
read more “Everything you need to know about Google Fuchsia”
