6fb794bc79
* Delete outdated development instructions for Next.js + Tailwind and Python; add comprehensive guidelines for PostgreSQL DBA, Angular, ASP.NET REST APIs, Azure Functions with TypeScript, Bicep, Blazor, CMake with vcpkg, C#, .NET MAUI, GenAIScript, Terraform for Azure, localization, and markdown standards. * Update documentation and prompts for consistency and clarity - Standardized description formatting in various markdown files to use single quotes. - Added error handling utility in update-readme.js for safer file operations. - Improved title extraction logic in update-readme.js to handle frontmatter more robustly. - Updated chat modes section in README to reflect new emoji and sorted chat mode links. - Cleaned up various instruction files for better readability and consistency. - Ensured all markdown files end with a newline for better compatibility with version control. * Remove standardize-frontmatter.js script * Add usage instructions for creating and switching chat modes in README.md * Update README.md generation script to enhance instructions and usage details for custom chat modes * Update README.md and update-readme.js for improved instruction clarity and consistency * Refactor README.md links and update readme script for improved clarity and consistency in instructions * Update README.md and update-readme.js for improved instruction clarity and consistency * Changing from a patch to regen approach for the readme * Bit more cleanup for how to show things in the readme * Adding missing description * Another missing description --------- Co-authored-by: Aaron Powell <me@aaron-powell.com>
73 lines
2.8 KiB
Markdown
73 lines
2.8 KiB
Markdown
---
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mode: 'agent'
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tools: ['changes', 'codebase', 'editFiles', 'problems', 'search']
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description: 'Get best practices for NUnit unit testing, including data-driven tests'
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---
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# NUnit Best Practices
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Your goal is to help me write effective unit tests with NUnit, covering both standard and data-driven testing approaches.
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## Project Setup
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- Use a separate test project with naming convention `[ProjectName].Tests`
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- Reference Microsoft.NET.Test.Sdk, NUnit, and NUnit3TestAdapter packages
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- Create test classes that match the classes being tested (e.g., `CalculatorTests` for `Calculator`)
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- Use .NET SDK test commands: `dotnet test` for running tests
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## Test Structure
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- Apply `[TestFixture]` attribute to test classes
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- Use `[Test]` attribute for test methods
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- Follow the Arrange-Act-Assert (AAA) pattern
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- Name tests using the pattern `MethodName_Scenario_ExpectedBehavior`
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- Use `[SetUp]` and `[TearDown]` for per-test setup and teardown
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- Use `[OneTimeSetUp]` and `[OneTimeTearDown]` for per-class setup and teardown
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- Use `[SetUpFixture]` for assembly-level setup and teardown
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## Standard Tests
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- Keep tests focused on a single behavior
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- Avoid testing multiple behaviors in one test method
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- Use clear assertions that express intent
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- Include only the assertions needed to verify the test case
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- Make tests independent and idempotent (can run in any order)
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- Avoid test interdependencies
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## Data-Driven Tests
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- Use `[TestCase]` for inline test data
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- Use `[TestCaseSource]` for programmatically generated test data
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- Use `[Values]` for simple parameter combinations
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- Use `[ValueSource]` for property or method-based data sources
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- Use `[Random]` for random numeric test values
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- Use `[Range]` for sequential numeric test values
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- Use `[Combinatorial]` or `[Pairwise]` for combining multiple parameters
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## Assertions
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- Use `Assert.That` with constraint model (preferred NUnit style)
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- Use constraints like `Is.EqualTo`, `Is.SameAs`, `Contains.Item`
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- Use `Assert.AreEqual` for simple value equality (classic style)
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- Use `CollectionAssert` for collection comparisons
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- Use `StringAssert` for string-specific assertions
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- Use `Assert.Throws<T>` or `Assert.ThrowsAsync<T>` to test exceptions
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- Use descriptive messages in assertions for clarity on failure
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## Mocking and Isolation
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- Consider using Moq or NSubstitute alongside NUnit
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- Mock dependencies to isolate units under test
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- Use interfaces to facilitate mocking
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- Consider using a DI container for complex test setups
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## Test Organization
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- Group tests by feature or component
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- Use categories with `[Category("CategoryName")]`
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- Use `[Order]` to control test execution order when necessary
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- Use `[Author("DeveloperName")]` to indicate ownership
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- Use `[Description]` to provide additional test information
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- Consider `[Explicit]` for tests that shouldn't run automatically
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- Use `[Ignore("Reason")]` to temporarily skip tests
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