Testing

Unit testing frameworks, assertion libraries, mocking, and test-driven development methodology.

Pages

• NUnit — NUnit constraint-based assertion model and test framework for .NET
• xUnit — xUnit.net free, open-source, community-focused unit testing tool for .NET
• MSTest — MSTest unit testing framework for Visual Studio

TDD and Supporting Tools

Test-Driven Development methodology: write tests first, then implement to make them pass.

Key properties of a good unit test: atomic, deterministic, repeatable, order-independent, fast, and easy to set up.

Recommended reading:

• Growing Object-Oriented Software, Guided by Tests — Freeman & Pryce (2010)
• Test Driven Development By Example — Kent Beck (2002)

Mocking and assertion libraries:

• MOQ (Moq) — mocking framework for .NET using lambda-based setup and verification
• FluentAssertions — fluent assertion library for expressive, readable test assertions
• Microsoft.AspNetCore.TestHost — integration testing host for ASP.NET Core applications
• OpenCover — open-source code coverage tool for all .NET frameworks

FakeItEasy

FakeItEasy — the easy mocking library for .NET 1.

• Throwing exceptions 2
• MustHaveHappened with A<T>.That.Contains for collection argument matching 3

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Table of contents

• NUnit
• xUnit
• MSTest