Individual skill
tdd
Guided test-driven development workflow for .NET 10 using xUnit v3, WebApplicationFactory, Testcontainers, and Verify snapshots. Follows the strict red-green-refactor cycle. Use when: "TDD", "test-driven", "let's TDD this", "red green refactor", "write the test first", or when building a feature with clear acceptance criteria.
skills/tdd/SKILL.md
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# /tdd -- Red-Green-Refactor for .NET
## What
Guides a strict test-driven development cycle for .NET features. Instead of
writing implementation first and bolting on tests after, this command flips the
order: write a failing test that defines the desired behavior, implement the
minimum code to make it pass, then refactor with confidence.
Every cycle uses the .NET testing stack:
- **xUnit v3** -- Test framework with `[Fact]` and `[Theory]`
- **WebApplicationFactory** -- Integration tests against the real HTTP pipeline
- **Testcontainers** -- Real databases (PostgreSQL, SQL Server) in tests
- **Verify** -- Snapshot testing for complex response structures