Nunit Skill

Generates NUnit 3 tests in C#. Covers Assert.That constraint model, parameterized tests, setup/teardown, and Moq mocking. Use when user mentions "NUnit", "[TestFixture]", "[Test]", "Assert.That", "C# unit test". Triggers on: "NUnit", "[Test]", "Assert.That", "C# test", "NUnit3".

386 stars 76 forksTesting & QAOfficial

Install

skills CLI (Claude Code, Cursor, Codex and more)
npx skills add LambdaTest/agent-skills --skill nunit-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/nunit-skill ~/.claude/skills/nunit-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

# NUnit 3 Testing Skill

## Core Patterns

### Basic Test

```csharp
using NUnit.Framework;

[TestFixture]
public class CalculatorTests
{
    private Calculator _calculator;

    [SetUp]
    public void SetUp() => _calculator = new Calculator();

    [Test]
    public void Add_TwoPositiveNumbers_ReturnsSum()
    {
        Assert.That(_calculator.Add(2, 3), Is.EqualTo(5));
    }

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

    [TearDown]
    public void TearDown() { /* cleanup */ }
}
```

### Constraint Model (Assert.That)

```csharp
Assert.That(actual, Is.EqualTo(expected));
Assert.That(actual, Is.Not.EqualTo(unexpected));
Assert.That(value, Is.GreaterThan(5));
Assert.That(value, Is.InRange(1, 10));
Assert.That(str, Does.Contain("hello"));
Assert.That(str, Does.StartWith("He").IgnoreCase);
Assert.That(collection, Has.Count.EqualTo(3));
Assert.That(collection, Has.Member("item"));
Assert.That(collection, Is.All.GreaterThan(0));
Assert.That(obj, Is.Null);
Assert.That(obj, Is.Not.Null);
Assert.That(obj, Is.InstanceOf<MyClass>());
Assert.That(actual, Is.EqualTo(3.14).Within(0.01));
Assert.That(() => Method(), Throws.TypeOf<ArgumentException>()
    .With.Message.Contains("invalid"));
```

### Parameterized Tests
Read the full skill on GitHub

Details

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

FAQ

What does the Nunit Skill skill do?

Generates NUnit 3 tests in C#. Covers Assert.That constraint model, parameterized tests, setup/teardown, and Moq mocking. Use when user mentions "NUnit", "[TestFixture]", "[Test]", "Assert.That", "C# unit test". Triggers on: "NUnit", "[Test]", "Assert.That", "C# test", "NUnit3".

How do I install the Nunit Skill skill?

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

Is Nunit 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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