dotnet-testing-private-internal-testing

What problem does it solve?

This Skill guides testers and developers in designing and validating tests for private and internal members of .NET projects, emphasizing testability and safe exposure strategies.

Core Features & Use Cases

• InternalsVisibleTo guidance: how to expose internal members to test projects safely using the Meziantou MSBuild approach or other methods.
• Reflection-based testing: techniques to access and test internal/private methods with helper utilities and wrapper methods.
• Design-for-testability: strategies such as strategy pattern refactoring to improve testability of complex logic.
• Use Case: validate internal algorithms in a class library without compromising encapsulation.

Quick Start

• Enable internals visibility to your test projects using InternalsVisibleTo (via AssemblyInfo, csproj, or Meziantou package).
• Use reflection helpers to access private methods in tests.
• Start with a small internal class, write unit tests, and progressively refactor to improve testability.