Unit Testing in .NET Core with NUnit and xUnit

Writing reliable code is the cornerstone of professional software development, yet many developers struggle to structure their tests effectively. This text-based course helps you bridge the gap between writing code and verifying its behavior with confidence. You will transition from writing manual tests to designing structured, automated test suites that run seamlessly in modern .NET environments. Through clear written explanations and practical code snippets, you will learn to isolate dependencies, handle asynchronous operations, and write assertions that make your code resilient to regression. What you'll learn: • Learn the core principles of unit testing, test-driven development (TDD), and the test lifecycle. • Master NUnit and xUnit frameworks to write expressive, reusable, and parameterised test cases. • Apply mocking patterns using modern isolation tools to decouple your code from databases and external APIs. • Understand how to test asynchronous methods, handle exceptions, and manage test state. • Practice writing assertions using fluent syntax to make your test failures readable and actionable. • Configure test runs and review code coverage reports using the .NET command-line interface. The course begins with foundational testing terminology and the basic anatomy of a unit test before guiding you step-by-step through assertions, dependency mocking, and test organization. This course is designed for beginner .NET developers who want to establish solid testing habits, requiring no prior testing experience. Start reading today to build bulletproof .NET applications with clean, automated test suites.