Xunit Skill

Generates xUnit.net tests in C#. Covers Fact/Theory, constructor injection, IClassFixture, and FluentAssertions. Use when user mentions "xUnit", "[Fact]", "[Theory]", "Assert.Equal", "C# xUnit". Triggers on: "xUnit", "[Fact]", "[Theory]", "Assert.Equal C#", "xUnit.net".

386 stars 76 forksTesting & QAOfficial

Install

skills CLI (Claude Code, Cursor, Codex and more)
npx skills add LambdaTest/agent-skills --skill xunit-skill
Manual install
git clone --depth 1 https://github.com/LambdaTest/agent-skills.git /tmp/agent-skills
mkdir -p ~/.claude/skills
cp -r /tmp/agent-skills/xunit-skill ~/.claude/skills/xunit-skill

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# xUnit.net Testing Skill

## Core Patterns

### Basic Test

```csharp
using Xunit;

public class CalculatorTests
{
    private readonly Calculator _calc = new();

    [Fact]
    public void Add_TwoPositiveNumbers_ReturnsSum()
    {
        Assert.Equal(5, _calc.Add(2, 3));
    }

    [Fact]
    public void Divide_ByZero_ThrowsException()
    {
        Assert.Throws<DivideByZeroException>(() => _calc.Divide(10, 0));
    }
}
```

### Theory (Parameterized)

```csharp
[Theory]
[InlineData(2, 3, 5)]
[InlineData(-1, 1, 0)]
[InlineData(0, 0, 0)]
public void Add_ReturnsCorrectSum(int a, int b, int expected)
{
    Assert.Equal(expected, _calc.Add(a, b));
}

[Theory]
[MemberData(nameof(GetTestData))]
public void Add_WithMemberData(int a, int b, int expected)
{
    Assert.Equal(expected, _calc.Add(a, b));
}

public static IEnumerable<object[]> GetTestData()
{
    yield return new object[] { 1, 2, 3 };
    yield return new object[] { -1, -1, -2 };
}

[Theory]
[ClassData(typeof(CalculatorTestData))]
public void Add_WithClassData(int a, int b, int expected)
{
    Assert.Equal(expected, _calc.Add(a, b));
}
```

### Assertions
Read the full skill on GitHub

Details

Skill name
xunit-skill
Repository
LambdaTest/agent-skills
Path
xunit-skill/SKILL.md
License
MIT
Repo updated
30 October 2026
Listed in
VoltAgent/awesome-agent-skills

FAQ

What does the Xunit Skill skill do?

Generates xUnit.net tests in C#. Covers Fact/Theory, constructor injection, IClassFixture, and FluentAssertions. Use when user mentions "xUnit", "[Fact]", "[Theory]", "Assert.Equal", "C# xUnit". Triggers on: "xUnit", "[Fact]", "[Theory]", "Assert.Equal C#", "xUnit.net".

How do I install the Xunit Skill skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add LambdaTest/agent-skills --skill xunit-skill. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Xunit Skill popular?

It lives in LambdaTest/agent-skills, which has 386 GitHub stars and 76 forks, and is included in 1 curated skill list.

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