Test your Chirp app the way it actually runs — drive real requests through the ASGI handler, then assert on the fragment, OOB, and SSE responses that come back. Start with the TestClient to make requests without a running server, then reach for the fragment and SSE assertions to check the hypermedia your handlers return.
Test Client
TestClient with async context manager
Make requests against your app without a running server.
Assertions
Fragment, OOB, and SSE assertion helpers
Check the fragments, out-of-band swaps, htmx headers, and SSE wiring your handlers return.
AI route testing
Mock LLM providers for agent and SSE chat tests
Script tool rounds and streamed answers without live API keys.