.NET testing

Created by CodeCraft LLC

Write, advise on, and review .NET tests

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by Jace (@jamick)v1.2.0 · updated 2026-10-16Report copyright infringement

Description

Write, advise on, and review .NET tests — choosing and following the framework (xUnit, NUnit, MSTest), test structure and naming, assertions (built-in, Shouldly, AwesomeAssertions; FluentAssertions licensing), mocking with NSubstitute/Moq and when not to mock, ASP.NET Core integration tests with WebApplicationFactory, real databases with Testcontainers instead of EF InMemory, time via TimeProvider/FakeTimeProvider, snapshot testing with Verify, coverage, parallelization, and running in CI. Use whenever a test project (.Tests.csproj) exists, the user asks to add or fix C# tests, test an API or EF Core code, or set up .NET testing in CI.

#testing#dotnet

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Changelog

v1.2.0Oct 16, 2026Latest

Added

references/xunit-moq-patterns.md: worked xUnit and Moq examples (Theory data, Moq setup and verification, AutoFixture, EF Core test options) - merged from the former csharp-unit-testing skill.

v1.1.0Oct 3, 2026

Changed

Checked against the official documentation (October 2026).
Added support dates: .NET 8 and .NET 9 end of support November 10, 2026; .NET 10 LTS until November 14, 2028; .NET 11 ships November 2026.
Added native Microsoft.Testing.Platform support in dotnet test from the .NET 10 SDK.

v1.0.1Oct 3, 2026

Changed

Added a trademark notice to the README.

v1.0.0Oct 2, 2026

Added

First release.