Create .NET 10 integration tests with WebApplicationFactory and Testcontainers.
npx skills add https://github.com/shahdanish/vibepos --skill testing-shahdanish
Please help me install this Agent Skill. Skill: testing Source: https://github.com/shahdanish/vibepos/tree/main/skills/testing Command: npx skills add https://github.com/shahdanish/vibepos --skill testing-shahdanish
This Skill helps you avoid fragile, low-value testing by giving a high-signal strategy for .NET 10 that validates behavior end-to-end with real databases.
Load this skill when you set up your test infrastructure and then write your first WebApplicationFactory integration test using AAA with Testcontainers-backed persistence.
High-intent search queries and answers about installing and using this skill.
Real database integration testing in .NET 10 uses Testcontainers to provision PostgreSQL or SQL Server databases dynamically, replacing in-memory databases to expose genuine SQL, constraint, and transaction issues during test runs.
Testing .NET API endpoints through the full HTTP pipeline is best achieved using WebApplicationFactory, which validates routing, binding, business logic, and persistence end-to-end without mocking the internal application infrastructure.
Snapshot testing with xUnit v3 uses the Verify framework to capture and compare serialized output, preventing brittle assertions by simplifying the verification of complex object states and API responses through baseline file comparisons.
Time-dependent logic in .NET 10 integration tests is handled using FakeTimeProvider, a deterministic clock implementation that allows precise control over time progression to validate timeouts and scheduled tasks reliably.
In-memory databases are insufficient for high-confidence xUnit v3 integration testing. Testcontainers is required to provision real PostgreSQL or SQL Server instances, catching actual SQL, constraint, and transaction issues that in-memory providers miss.
The AAA pattern should be used for all .NET 10 integration tests to structure test logic into Arrange, Act, and Assert phases, ensuring deterministic and robust test design when validating behavior through WebApplicationFactory.
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