dotnet-testing
Overview
Testing strategy, frameworks, and quality tooling for .NET applications. This consolidated skill spans 13 topic areas. Load the appropriate companion file from references/ based on the routing table below.
Baseline dependency: references/testing-strategy.md defines the unit vs integration vs E2E decision tree and test doubles selection that inform all testing decisions. Load it by default whenever a testing approach needs to be chosen.
Most-shared companion: references/xunit.md covers xUnit v3 framework features used by integration, snapshot, and UI testing companions.
Routing Table
| Topic | Keywords | Description | Companion File |
|---|---|---|---|
| Strategy | unit vs integration vs E2E, test doubles | Unit vs integration vs E2E decision tree, test doubles selection | references/testing-strategy.md |
| xUnit | Facts, Theories, fixtures, parallelism | xUnit v3 Facts, Theories, fixtures, parallelism, IAsyncLifetime | references/xunit.md |
| Integration | WebApplicationFactory, Testcontainers, Aspire | WebApplicationFactory, Testcontainers, Aspire, database fixtures | references/integration-testing.md |
| Snapshot | Verify, scrubbing, API responses | Verify library, scrubbing, custom converters, HTTP response snapshots | references/snapshot-testing.md |
| Playwright | E2E browser, CI caching, trace viewer | Playwright E2E browser automation, CI caching, trace viewer, codegen | references/playwright.md |
| BenchmarkDotNet | microbenchmarks, memory diagnosers | BenchmarkDotNet microbenchmarks, memory diagnosers, baselines | references/benchmarkdotnet.md |
| CI benchmarking | threshold alerts, baseline tracking | CI benchmark regression detection, threshold alerts, baseline tracking | references/ci-benchmarking.md |
| Test quality | Coverlet, Stryker.NET, flaky tests | Coverlet code coverage, Stryker.NET mutation testing, flaky tests | references/test-quality.md |
| Add testing | scaffold xUnit project, coverlet, layout | Scaffold xUnit project, coverlet setup, directory layout | references/add-testing.md |
| Slopwatch | LLM reward hacking detection | Slopwatch CLI for LLM reward hacking detection | references/slopwatch.md |
| AOT WASM | Blazor/Uno WASM AOT, size, lazy loading | Blazor/Uno WASM AOT compilation, size vs speed, lazy loading, Brotli | references/aot-wasm.md |
| UI testing core | page objects, selectors, async waits | Page object model, test selectors, async waits, accessibility testing | references/ui-testing-core.md |
| Aspire testing | DistributedApplicationTestingBuilder, Aspire test host | Aspire test host, service HTTP clients, resource health | references/aspire-testing.md |
Scope
- Test strategy and architecture (unit, integration, E2E)
- xUnit v3 test authoring
- Integration testing (WebApplicationFactory, Testcontainers)
- E2E browser testing (Playwright)
- Snapshot testing (Verify)
- Benchmarking (BenchmarkDotNet, CI gating)
- Quality (coverage, mutation testing)
- Cross-framework UI testing patterns
- Test scaffolding
Out of scope
- UI framework-specific testing (bUnit, Appium) ->
dotnet-ui - CI/CD pipeline configuration ->
dotnet-devops - Performance profiling ->
dotnet-tooling