csharp-testing

To write unit tests for C# services using xUnit, you structure tests using the Arrange-Act-Assert pattern and FluentAssertions for readable syntax, while organizing test code with data builders to ensure high quality and maintainable testing workflows.

The best way to set up ASP.NET Core integration tests is using WebApplicationFactory alongside Testcontainers, which allows you to validate infrastructure dependencies and application behavior through structured, real environment testing workflows.

Yes, you can use NSubstitute for mocking dependencies in .NET testing by implementing modern mocking patterns. This approach adheres to behavioral testing principles and helps isolate system components during unit test execution.

xUnit testing works with Testcontainers to validate real infrastructure during integration testing. This combination standardizes C# workflows by testing against actual dependencies rather than mocked interfaces, ensuring reliable infrastructure validation.

Common anti-patterns to avoid when organizing .NET tests include poor test structure and neglecting data builders. Adhering to behavioral testing principles and structured organization prevents unreliable C# codebases and maintains high code quality.