Controller unit tests with custom fixtures

In this recipe, we will set up unit testing on the Controller layer. We will explore the expanded version of the FluentAssertions library, FluentAssertions.AspNetCore.Mvc, which will allow us to assert against HTTP results and not only internal method logic. We will provide dependencies to the controller via AutoNSubstitute. Also, we will create a custom fixture to provide a consistent environment for our controller tests.

Getting ready

The starter project for this recipe can be found here: https://github.com/PacktPublishing/ASP.NET-9-Web-API-Cookbook/tree/main/start/chapter07/UnitTestsController.

You can also continue from the preceding recipe.

How to do it…

1. First, let’s import the expanded FluentAssertions package for testing the controller’s action methods. Make sure you add this only in the Unit.Tests project.

Important note

FluentAssertions.AspNetCore.Mvc cannot coexist with the standard...