Testcontainers Integration Tests

This one helps you write integration tests using TestContainers for .NET with xUnit, spinning up real databases, Redis, RabbitMQ, and other infrastructure in Docker containers instead of relying on mocks. It covers SQL Server, PostgreSQL, testing actual database migrations, handling container lifecycle with IAsyncLifetime, and using Respawn to reset data between tests without recreating containers. The core argument is solid: mocking a database doesn't catch SQL syntax errors, constraint violations, or real query behavior. You get actual integration confidence at the cost of slightly slower tests, though the patterns here show you how to reuse containers across test classes to keep things fast. Works in CI/CD environments that support Docker.

skills.sh installs: 579
GitHub stars: 1.3K
last updated: Aug 21, 2026

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Install

$ npx -y skills add aaronontheweb/dotnet-skills --skill testcontainers-integration-tests --agent claude-code

Installs into .claude/skills of the current project.

Files

Integration Testing with TestContainers

When to Use This Skill

Use this skill when:

Writing integration tests that need real infrastructure (databases, caches, message queues)
Testing data access layers against actual databases
Verifying message queue integrations
Testing Redis caching behavior
Avoiding mocks for infrastructure components
Ensuring tests work against production-like environments
Testing database migrations and schema changes

Reference Files

database-patterns.md: SQL Server, PostgreSQL, and migration testing examples
infrastructure-patterns.md: Redis, RabbitMQ, multi-container networks, container reuse, and Respawn