dotnet-testing-advanced-testcontainers-database

You can run integration tests against real databases by using .NET Testcontainers to automatically provision and tear down isolated SQL Server or PostgreSQL Docker containers during your test runs. This validates database-specific behaviors realistically.

Yes, Testcontainers works with both EF Core and Dapper data layers. It provisions containerized SQL Server and PostgreSQL instances, enabling end-to-end validation of transactions, concurrency, and specific database features through container connection strings.

To reduce container startup time for database integration tests, implement a shared collection fixture pattern. This provisions a single container instance across multiple test classes, significantly improving overall test performance and execution speed.

You can manage database schemas and seed data for repeatable Testcontainers tests by externalizing SQL scripts. The Skill supports loading these external scripts to define the schema and seed initial data when the containerized database is provisioned.

Yes, Docker Desktop is required to run Testcontainers database tests. Your environment must have Docker Desktop actively running to provision and manage the SQL Server or PostgreSQL containers needed for validating your .NET data access layers.

The best way to test transactions and concurrency in .NET data access layers is using Testcontainers to spawn real MSSQL or PostgreSQL databases. This enables testing actual database features in isolated containers rather than relying on in-memory mocks.