NUnit

NUnit is an open-source unit testing framework for .NET languages, primarily used for writing and running automated tests in C#, F#, and VB.NET. It provides attributes, assertions, and test runners to help developers create reliable, repeatable tests for their code. As a key part of the .NET testing ecosystem, it supports test-driven development (TDD) and behavior-driven development (BDD) practices.

Also known as: NUnit Framework, NUnit 3, NUnit Test Framework, NUnit Runner, NUnit Console

Why learn NUnit?

Developers should learn NUnit when building .NET applications to ensure code quality, catch bugs early, and facilitate refactoring by automating unit tests. It is essential for projects following TDD or BDD methodologies, as it integrates seamlessly with Visual Studio and CI/CD pipelines like Azure DevOps or Jenkins. Use cases include testing business logic, APIs, and libraries in enterprise or open-source .NET projects.

Learning Resources

• docs: NUnit Documentation
• course: Getting Started with NUnit - Pluralsight Course
• video: NUnit Tutorial for Beginners - YouTube
• tutorial: Unit Testing in C# with NUnit - Microsoft Learn
• book: The Art of Unit Testing with Examples in C# (Book)