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Tag: integration-tests

3 posts

2026-08-07 comparison dotnet aspnetcore

WebApplicationFactory vs Testcontainers for ASP.NET Core integration tests

They are not alternatives. WebApplicationFactory boots your app, Testcontainers boots your dependencies. Measured on .NET SDK 10.0.201: a container fixture costs 1.7 s per class against 10 ms for SQLite, and a HasMaxLength(16) violation that Postgres rejects with 22001 is silently accepted by SQLite.

2026-07-26 csharp dotnet dotnet-11

How to write integration tests with WebApplicationFactory<T> in ASP.NET Core 11

A complete guide to WebApplicationFactory<TEntryPoint> in ASP.NET Core 11: making the Program entry point reachable, ConfigureTestServices vs ConfigureWebHost, replacing the EF Core registration through IDbContextOptionsConfiguration, the new ConfigureHostApplicationBuilder hook in .NET 11 preview 6, faking authentication, WebApplicationFactoryClientOptions, and UseKestrel when you need a real port.

2026-05-01 csharp dotnet dotnet-11

How to write integration tests against a real SQL Server with Testcontainers

A complete guide to running ASP.NET Core integration tests against a real SQL Server 2022 using Testcontainers 4.11 and EF Core 11: WebApplicationFactory wiring, IAsyncLifetime, swapping the DbContext registration, applying migrations, parallelism, Ryuk cleanup, and CI gotchas.