How does this handle the Microsoft Testing Platform (MTP)?

It provides the correct command-line syntax and project file configurations for MTP, which differs significantly from the legacy VSTest (dotnet test) syntax.

Why does this skill recommend AwesomeAssertions over FluentAssertions?

As of version 8.x, FluentAssertions requires a commercial license for production use. This skill utilizes AwesomeAssertions, an Apache 2.0 fork that maintains 100% API compatibility.

Can I use this for containerized databases other than PostgreSQL?

While it provides specific patterns for PostgreSQL, RabbitMQ, and Elasticsearch, the fixture patterns are easily adaptable for any container supported by Testcontainers.

Does this skill support the latest .NET versions?

Yes, it includes specific package compatibility matrices and configuration patterns for .NET 8, .NET 9, and .NET 10 Preview.

.NET Testcontainers & xUnit v3 Expert

Name: .NET Testcontainers & xUnit v3 Expert
Author: ANcpLua

byANcpLua

•

Security & Testing

Streamlines .NET integration testing by configuring Testcontainers, xUnit v3, and Moq with modern implementation patterns.

This skill provides expert-level guidance for architecting robust .NET integration test suites using Docker containers and the latest testing frameworks. It specifically addresses complex configuration challenges involving xUnit v3 and the Microsoft Testing Platform (MTP), provides critical package compatibility matrices for .NET 8, 9, and 10, and implements advanced patterns for mocking sealed clients and extracting testable logic from BackgroundServices. It ensures your testing infrastructure is high-performance, maintainable, and license-compliant by leveraging community-driven tools like AwesomeAssertions.

Key Features

01Detailed package compatibility mapping for .NET 8, 9, and 10 (updated Nov 2025)

02License-safe assertion patterns using the AwesomeAssertions Apache 2.0 framework

03Automated configuration for xUnit v3 and Microsoft Testing Platform (MTP) syntax

041 GitHub stars

05Comprehensive Testcontainers setup for PostgreSQL, RabbitMQ, Elasticsearch, and MinIO

06Advanced mocking patterns for sealed external clients and file system abstractions

Use Cases

01Setting up isolated integration test environments with Dockerized databases and message queues

02Migrating legacy VSTest suites to the modern Microsoft Testing Platform with xUnit v3

03Extracting and unit testing business logic from complex .NET BackgroundServices

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ancplua/ancplua-claude-plugins testcontainers-dotnet

For use in Claude.ai and ChatGPT

Download Skill