csharp-xunit

Write unit tests in C# using XUnit with data-driven attributes and mocking strategies.

Updated Dec 28, 2025

Search Tags:#tdd #csharp #unit testing #dotnet #xunit #testing best practices

Ready to run

npx skills add https://github.com/74nu5/Narratum --skill csharp-xunit

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Please help me install this Agent Skill.
Skill: csharp-xunit
Source: https://github.com/74nu5/Narratum/tree/main/.github/skills/csharp-xunit
Command: npx skills add https://github.com/74nu5/Narratum --skill csharp-xunit

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps developers write robust and maintainable unit tests in C# using the XUnit framework, covering standard and data-driven testing techniques.

Core Features & Use Cases

XUnit Fundamentals: Learn about test structure, naming conventions, and the Arrange-Act-Assert pattern.
Data-Driven Testing: Implement tests with varying data inputs using [Theory], [InlineData], [MemberData], and [ClassData].
Assertions & Mocking: Utilize a comprehensive set of assertions and integrate with mocking libraries for isolated testing.
Use Case: Improve the quality and reliability of your .NET applications by ensuring critical code paths are thoroughly tested with best practices.

Quick Start

Use the csharp-xunit skill to learn how to write a data-driven test using [InlineData].

Frequently Asked Questions about csharp-xunit

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

FAQPage Schema

What's the best way to write data-driven unit tests in C# using xUnit?▼

Data-driven unit tests in C# using xUnit are best written using the [Theory] attribute combined with [InlineData], [MemberData], or [ClassData] to feed varying inputs into a single test method. This approach ensures robust and maintainable test execution across multiple scenarios.

How do I organize my xUnit testing projects for maintainable .NET applications?▼

To organize xUnit testing projects for maintainable .NET applications, follow the Arrange-Act-Assert pattern and standard naming conventions. Proper test structure and organization techniques ensure your test suites remain deterministic and easy to manage as your codebase grows.

Can I use mocking strategies with xUnit for isolated C# unit testing?▼

Yes, you can use mocking strategies with xUnit for isolated C# unit testing. The framework allows you to integrate with mocking libraries and utilize a comprehensive set of assertions to verify interactions and isolate critical code paths from external dependencies.

What is the Arrange-Act-Assert pattern in xUnit unit testing?▼

The Arrange-Act-Assert pattern in xUnit unit testing is a standard structure that separates test setup, action execution, and result verification. Following this pattern establishes a clear, maintainable test flow for ensuring critical code paths are thoroughly tested.

When should I use [MemberData] versus [InlineData] for C# xUnit tests?▼

You should use [InlineData] for simple, hardcoded primitive values in C# xUnit tests, whereas [MemberData] is used when you need to pass complex types or generate data dynamically from a class member. Both attributes facilitate effective data-driven testing practices.