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Testing patterns for FastAPI with pytest-asyncio, httpx AsyncClient, fixtures, and test data factories. Use when writing tests, setting up test infrastructure, or improving coverage in a FastAPI project.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
Generate complete service-level Terraform infrastructure with modules, environments, and CI/CD. Use when adding Terraform to a new service or bootstrapping infrastructure from scratch.
Audit JS/TS projects against NPM Security Guidelines covering project setup, dependency hygiene, CI/CD pipeline, Dependabot, and incident response. Use when reviewing package.json or lockfiles, adding or upgrading npm dependencies, setting up CI security gates, hardening a new repo, or responding to a compromised package.
Creates FastAPI endpoints with layered architecture (Router → Service → Repository). Use when creating new API endpoints, CRUD operations, or scaffolding a new domain module in a FastAPI project.
Python/FastAPI coding standards including async patterns, Pydantic v2, SQLAlchemy 2.0, and project structure. Use when writing Python code, reviewing FastAPI projects, or learning FastAPI conventions.
Investigate a monitoring alert end-to-end. Pulls metrics, logs, traces, and recent code changes to identify root cause. Works with any monitoring MCP.
Create a structured on-call log by pulling alerts from monitoring and writing a summary to your team's wiki. Requires a monitoring MCP (recommended: Datadog) and a wiki MCP (Confluence or Notion).
SOC 職業分類に基づく
| name | python-testing-strategies |
| description | Testing patterns for FastAPI with pytest-asyncio, httpx AsyncClient, fixtures, and test data factories. Use when writing tests, setting up test infrastructure, or improving coverage in a FastAPI project. |
| allowed_tools | ["Read","Write","Edit","Glob","Grep","Bash"] |
Set asyncio_mode = "auto" in pyproject.toml to auto-detect async tests without markers. (The default "strict" mode also works if you mark tests with @pytest.mark.asyncio.)
See examples.md for the complete conftest.py and pyproject.toml setup.
Use httpx.AsyncClient + ASGITransport — never TestClient for async tests.
See examples.md for client fixture setup.
async def test_create_item(): # Happy path
async def test_create_item_missing_name(): # Validation
async def test_get_item_not_found(): # 404
async def test_get_item_soft_deleted(): # Soft delete
Use simple factory functions with sensible defaults. Override only what the test cares about.
See examples.md for factory patterns.
pytest # All tests
pytest tests/test_items.py # One file
pytest -k "test_create" # By name pattern
pytest --tb=short -q # Quiet output
Missing asyncio_mode = "auto" silently breaks everything. Tests appear to pass (0 collected) or hang indefinitely. Add [tool.pytest.ini_options] asyncio_mode = "auto" to pyproject.toml before writing any async test. This is the #1 cause of "my tests don't run."
TestClient and AsyncClient are not interchangeable. TestClient (from Starlette) is synchronous — it blocks. AsyncClient (from httpx) is async — it uses the event loop. If your app uses async def routes with await, you must use AsyncClient with ASGITransport. Using TestClient may hide async bugs because it runs synchronously.
Database state leaks between tests without proper cleanup. Each test needs a clean database. Use an autouse=True fixture that creates/drops tables, or truncate between tests. Without this, test order matters and random failures appear in CI.
response.json() returns snake_case from FastAPI by default. If your Pydantic models use alias_generator, the JSON keys may differ from your Python field names. Always assert against the actual JSON keys, not the Python attribute names.
Forgetting to await in async tests gives confusing errors. If you see <coroutine object ...> in test output instead of actual data, you forgot an await. Every client.get(), client.post(), etc. must be awaited.