AI Agent Skills for .NET Testing - Based on 30-Day Testing Challenge (iThome Ironman 2025 Winner)
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to testing .NET Aspire distributed applications, which are programs made of several coordinated services. It covers tests that run the real service setup through an AppHost, the project that describes how those services are arranged.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
Guidance for ASP.NET Core integration tests, which test several web application parts together through HTTP requests and responses.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
Guidance for integration tests that use Testcontainers, a library that starts real services in temporary Docker containers, with databases such as SQL Server, PostgreSQL, or MySQL.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
Guidance for integration tests using Testcontainers with MongoDB, a document database, and Redis, an in-memory key-value database.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide for advanced TUnit testing in .NET. TUnit is a testing framework; the guide covers tests driven by data, dependency injection, integration tests, retries, time limits, and filtering.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to using TUnit, a testing framework for .NET applications. It covers creating tests, moving from xUnit, and running tests with compile-time discovery and ahead-of-time compilation.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
Guidance for ASP.NET Core Web API integration tests, including HTTP endpoints and ProblemDetails, a standard format for describing API errors.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A migration guide for updating .NET projects from xUnit 2.9 to xUnit 3, where xUnit is a framework for running automated tests. It covers renamed packages, required runtimes, breaking changes, upgrade steps, new features, and test-container integration.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide that routes advanced .NET testing questions to the right specialist instructions. It covers API and integration tests, database and other container-based tests, microservices, .NET Aspire, and related testing tools.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide for using AutoFixture, a .NET library that creates test data, with xUnit, a .NET testing framework. It explains attributes such as AutoData, InlineAutoData, and MemberAutoData for supplying values to parameterized tests.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to AutoFixture, a .NET library that creates sample objects and values for tests automatically. It covers creating one object or collections, setting selected properties, and handling circular references.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide for combining AutoFixture and Bogus to create test objects with both automatically filled fields and realistic values such as names, email addresses, and phone numbers. AutoFixture creates anonymous test data, while Bogus generates realistic-looking sample data.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to customizing AutoFixture, a .NET library that creates test objects automatically. It covers custom rules for generated values, validation attributes, and reusable builders.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A .NET testing guide for using AutoFixture and NSubstitute to automatically create test data and substitute versions of dependencies.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to AwesomeAssertions, a .NET library for writing readable checks in automated tests. It covers checks for objects, collections, strings, numbers, exceptions, and asynchronous code.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to Bogus, a .NET library for generating realistic fake data such as names, addresses, phone numbers, emails, and product records. It shows how to define generation rules and create one or many records.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to code coverage, a measurement of which parts of a program run while tests execute. It explains coverage reports, Coverlet, Visual Studio, and VS Code, and notes that a high percentage alone does not prove the tests are good.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A testing guide for comparing complex .NET objects, including nested data structures, selected properties, and objects that refer back to themselves. DTOs are data-transfer objects used to carry data between parts of an application, while entities usually represent stored data.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide for testing .NET code that depends on the current date or time. It uses TimeProvider to supply time and FakeTimeProvider to set, freeze, change, or advance simulated time during tests.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A .NET testing guide for replacing real file and directory operations with an in-memory test file system. `IFileSystem` is the application-facing interface, and `MockFileSystem` supplies the pretend files used by tests.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide for testing FluentValidation validators, which are .NET components that check whether data follows rules before the application accepts it. It covers checking validation errors, messages, asynchronous rules, and rules involving multiple fields.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to using NSubstitute to create test doubles, which are stand-ins for real dependencies such as databases, files, or web services. It explains how to set return values, raise errors, and check whether methods were called.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to testing private and internal members in .NET, including design changes, friend-assembly access, and reflection. Private members are available only inside their class; internal members are limited to the same project.
kevintsengtw/dotnet-testing-agent-skills
Skill Claude CodeCodex
A guide to the Test Data Builder pattern, a way to create test objects from sensible defaults while changing only the fields relevant to each test. It uses readable builder methods such as setting a name or creating an administrator user.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: