Master programming syntax, solve interactive challenges & run live code in Syntaxis Explore Arena →
menu_book Course Curriculum (FastAPI) expand_more
Application Basics
FastAPI app uvicorn development server path operation path parameter query parameter request body Pydantic model response model status code response headers
Validation
field constraints optional fields nested models list validation custom validator model validator query constraints path constraints header parameters cookie parameters
Dependencies
Depends basics dependency with parameters class dependency sub-dependencies dependency caching yield dependency database session dependency authentication dependency router dependencies global dependencies
Routing & Responses
APIRouter router prefix router tags JSONResponse RedirectResponse FileResponse StreamingResponse custom response class exception handler HTTPException
Security
OAuth2PasswordBearer OAuth2 password flow JWT creation JWT validation password hashing scopes CORS middleware API key header cookie auth concepts secret configuration
Async & Integration
async endpoint sync endpoint behavior background tasks WebSocket endpoint lifespan context file upload form data external API with httpx async database query task cancellation
Testing
TestClient dependency override async test request validation test auth test WebSocket test mock external API startup lifespan test response schema test error handler test
Production
OpenAPI customization docs URLs logging trusted hosts HTTPS redirect workers health endpoint readiness endpoint database pool deployment checklist
FastAPI / Testing

async test

Learn async test in FastAPI with a dedicated explanation, a topic-specific example, edge guidance, and a mastery check.

12 min read • Advanced
fastapi-063.py
python 
@pytest.mark.anyio
async def test_rates():
    async with AsyncClient(transport=ASGITransport(app=app),base_url="http://test") as client: assert (await client.get("/rates")).status_code==200
What to watch
Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

async test Mastery Check →
← PREVIOUS
dependency override
NEXT →
request validation test