xunit

Write and organize xUnit tests for C# projects with FluentAssertions and Moq.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/StuartF303/Sorcha --skill xunit
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: xunit
Source: https://github.com/StuartF303/Sorcha/tree/main/.claude/skills/xunit
Command: npx skills add https://github.com/StuartF303/Sorcha --skill xunit

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill assists developers in building and maintaining robust xUnit test suites across multiple C# projects, promoting consistent practices and reliable validation.

Core Features & Use Cases

  • Unit Test Framework: Leverages xUnit to organize and execute tests across modules.
  • Assertion & Mocking Patterns: Encourages FluentAssertions for readable assertions and Moq for mocks.
  • Use Case: A developer adds tests to WalletManager to ensure correct behavior under various scenarios using theories and inline data.

Quick Start

Use the xunit skill to scaffold a basic WalletManagerTests with a [Fact] test verifying a simple CreateAsync operation.

Frequently Asked Questions about xunit

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write unit tests in C# with xUnit?

xUnit is a .NET unit testing framework that organizes tests using [Fact] and [Theory] attributes. Write test methods in a dedicated test project, structure them with the AAA pattern (Arrange, Act, Assert), and execute them across your C# projects to validate behavior.

What's the best way to organize xUnit tests across multiple projects?

Organize xUnit tests by creating a test project for each module, use [Fact] for single cases and [Theory] with inline data for multiple scenarios, and maintain consistent naming conventions. This structure scales across large C# solutions and keeps validation reliable.

Can I use FluentAssertions and Moq with xUnit tests?

Yes, xUnit integrates seamlessly with FluentAssertions for readable, chainable assertions and Moq for creating mocks and stubs. Together they enable expressive test syntax and isolated unit testing across your C# test suites.

Do I need xUnit 2.9.3, or can I use a different version?

The xUnit skill requires xUnit 2.9.3 framework, FluentAssertions, and Moq dependencies in your .NET test project environment. This version ensures compatibility with the patterns and features covered in test organization and theory data handling.

How do I use Theory data in xUnit instead of writing multiple test methods?

xUnit's [Theory] attribute with inline data or data sources lets you run a single test method across multiple input sets. This reduces duplication, improves readability, and validates behavior under various scenarios without repeating test logic.

Why use AAA pattern for structuring xUnit tests?

The AAA pattern (Arrange, Act, Assert) structures each test into setup, execution, and verification phases. This approach clarifies intent, improves maintainability, and makes xUnit tests easier to read, debug, and extend across C# projects.