Today Microsoft announced .NET MAUI – a successor of Xamarin.Forms. Besides well known MVVM, .NET MAUI will use MVU (Model-Vue-Update) pattern. At first glance, the code will be much more readable (shorter) and closer to functional programming. Next milestone is single project for all types platforms. Right now, you need to have separate for iOS, …
Category: CSharp
SpecFlow – BDD in C# – induction
BDD – this acronym stand for Behavior Driven Development. This methology has been built using concepts of TDD (Test Driven Development) and DDD (Domain Driven Design). This type of tests is often done as integration tests (UI tests or API). One of the most popular libraries is SpecFlow. I was using this solution for Xamarin, …
Security Code Scan – open source vulnerability patterns detector
Security Code Scan is open source (LGPL v3.0) vulnerability patterns detector for C# (including .NET Core) and VB.NET. It has two installation modes: either as VS extension or as nuget package (SecurityCodeScan). Instead of writing about types of attacks which it can detect – let’s demo it. As a test application, I created API application …
Fluent Assertions in unit tests
As a continouation of the article about unit test frameworks I would like to introduce Fluent Assertions. This framework simplifies testing by BDD style syntax. Let’s start from basic assertion. As you noticed, first is going the result, then the keyword (or rather extension method) Should() and at the end the condition (so in case …
.NET unit test frameworks comparison
In .NET we have 3 dominant unit test frameworks: MS Test (v2) NUnit (3.x) xUnit (2.x) First one comes with Visual Studio, two other requires additional components installation. Initialize First difference we will find in initialization approach. In MS Test there several initialization available (by attributes): AssemblyInitialize, ClassInitialize and TestInitialize. The disadvantage is that initialization …
Install .NET Core on Debian Linux
Microsoft prepared quite good instruction how to install dotnet runtime on Linux. I’ve been interested in Debian distro. So I went pretty smooth through the first part of the manual (system setup). However installing dotnet I had constinously an error that package cannot be found. First comment: the package name has been changed and it …
AWS Cognito – Identity Pool usage in .NET Core
Some time ago I had to implement authorization and authentication for REST (.NET Core 2.1, the latest stable nuget package version is 2.1.3) web service using JWT tokens (bearer) using AWS Cognito Identity Pools. It was pretty hard to find the updated tutorials or materials (even on AWS most of the data is about old …
JetBrains research – The State of Developer Ecosystem in 2018
JetBrains just published they current research on the state of developer ecosystem. Key facts are: Java and JavaScript are still on top (recruiters: do not mess these technologies!). Also very popular are: SQL, Python, PHP, C#, C++. It seems like Kotlin and Rust are getting more popular. That was surprised me was statistics on employment: …
Refit as HTTP client
This post is dedicated to my colleague – Łukasz (his blog in Polish). Today I would like to introduce Refit library (GitHub repo). It is described as The automatic type-safe REST library for .NET Core, Xamarin and .NET. In Refit the interface with methods mapped to API actions is declared. I will use HNapi (Hacker …
Xamarin Live Player
Today I started playing with Xamarin Live Player. This tool allows to see the Xamarin.Forms live on device while you designing UI. It has beta version available on Test Flight. You need to register to get access to it. Unfortunately first experience was bad. I was waiting for a longer while to get information from …