xUnit - How to assert that a method throws an exception - 2022
A year ago I made a post on the absence of the DoesNotThrow assertion in xUnit. In this post I show how you can assert if »
The Arrange, Act and Assert structure for unit tests
The Triple A (AAA) abbreviation: Arrange, Act and Assert is a way to structure your unit tests into 3 sections: * Arrange: Assign variables, setup stubs, mocks »
C# - how to inject, mock or stub DateTime for unit tests
In this post I will demonstrate how you can stub the DateTime [https://docs.microsoft.com/en-us/dotnet/api/system.datetime?view=netcore-3.1] struct in »
xUnit - How to check if a call does not throw an exception
If you are moving from NUnit to xUnit, you will likely encounter the absence of the DoesNotThrow method in xUnit. At first I believed this did »
What is a unit test?
In this post I describe what units tests are all about. It seems to me that in the last many years, the focus has drifted away »
Mocks vs stubs, the pros and cons of frameworks vs implementations
I will go right to the point here. In the title I have used the term "stub" in its broad sense. What I really »
C# - How to mock a HttpClient dependency for tests - updated 2023
In this post I will go through how you can mock the HttpClient class in C#. This is often needed as almost everything we develop these »
Deciding on what values to use for (unit) test cases
Often when writing tests one value can be as good as any other value. Such as if you need to apply a number within a range »
Levels of automated tests in software development and programming - when to use what?
In this post I will describe some automated testing techniques. Testing is done to assure quality in our systems. But what is quality? Quality is that »
Why do we use mocking for unit tests? and the use of test-doubles - Updated 2022
In order to understand how and why we use mocks for tests we need to understand different types of test doubles (implementations used for testing) and »