Enforce Arrange-Act-Assert structure and assertion patterns in C# NUnit tests.
npx skills add https://github.com/CloudyWing/ai-dotfiles --skill csharp-nunit-cloudywing
Please help me install this Agent Skill. Skill: csharp-nunit Source: https://github.com/CloudyWing/ai-dotfiles/tree/main/skills/csharp-nunit Command: npx skills add https://github.com/CloudyWing/ai-dotfiles --skill csharp-nunit-cloudywing
Prevents inconsistent, flaky, or hard-to-read C# unit tests by prescribing a clear structure, naming, and assertion practices so test suites are reliable and maintainable.
Create an NUnit test named Calculate_InvalidInput_ThrowsArgumentException that follows Arrange-Act-Assert, uses TestCase for data-driven inputs, mocks dependencies with NSubstitute, and verifies the exception with Assert.Throws.
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Structure async NUnit tests by strictly separating Arrange, Act, and Assert sections without inline block comments. Ensure asynchronous tests return a Task type and use Assert.ThrowsAsync for exception validation to maintain reliable execution.
Use TestCaseSource for complex objects and TestCase for inline data in NUnit tests. For combinatorial scenarios, apply Values or Random attributes to reduce duplication while maintaining strict Arrange-Act-Assert spacing.
NSubstitute isolates dependencies by mocking interactions within the Arrange section of NUnit tests. This ensures tests remain independent and idempotent, allowing them to run in parallel without flaky behavior.
Yes, FluentAssertions can be used instead of Assert.That if preferred by your project. The standard approach also supports CollectionAssert for collections, StringAssert for strings, and Assert.Throws for exceptions.
NUnit test names fail when not matching the UnitOfWork_StateUnderTest_ExpectedBehavior format. Single-case tests must use the [Test] attribute and follow this naming convention to ensure test suites are readable and maintainable.
Yes, NUnit supports parallel execution for idempotent unit tests. By encouraging NSubstitute for mocking and ensuring tests are independent, the test suite remains reliable and maintainable when running in parallel.
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