TUnit Testing Best Practices
Write C# unit tests with the TUnit framework, including data-driven tests, following its conventions.
- Repository
- github/awesome-copilot
- Stars
- 40,703
- Licence
- MIT
- Files
- 1 file
What it does
When installed, the agent follows a set of guidelines for writing C# unit tests using TUnit, a testing framework for .NET. It shows how to structure test projects and classes, use TUnit attributes for standard and data-driven tests, write asynchronous fluent assertions, and migrate existing xUnit tests to TUnit. The skill is a written guide the agent reads; it does not run anything on its own.
Great for
- C# developers on .NET 8 or later starting a new TUnit test project
- Teams migrating test suites from xUnit to TUnit
- Developers who want help writing data-driven tests with [Arguments] or [MethodData]
Skip it if
- Projects that use xUnit, NUnit or MSTest and do not plan to switch, since the guidance is specific to TUnit (no reason to change frameworks just for this skill)
- Non-C# codebases, because the content only covers the .NET ecosystem
Try asking
- “Convert these xUnit tests in my OrderService.Tests project to TUnit”
- “Write data-driven TUnit tests for my PriceCalculator class using [Arguments]”
- “Set up a TUnit test project for my .NET 8 web API and explain the lifecycle hooks I should use”
Install in 3 steps
- 1
Download the skill
The ZIP contains the 1 original files, the MIT licence and an attribution note.
csharp-tunit.zip - 2
Add it to your agent
Claude Code (all projects)
mkdir -p ~/.claude/skills && unzip csharp-tunit.zip -d ~/.claude/skills/Claude Code / Agent SDK (this project only)
mkdir -p .claude/skills && unzip csharp-tunit.zip -d .claude/skills/Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.
- 3
Ask for the task
No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.
Get better results
- Name the class or method you want tested so the agent can match test class names to the code under test.
- Ask the agent to run dotnet test afterwards to confirm the generated tests actually pass.
- Check the generated code against the official TUnit documentation, since the skill's guidance is brief and version details may change.
What's inside
- SKILL.md
Redistributed unmodified from github/awesome-copilot under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.