test(examples-chat): fix no_fixture_match for contact-form welcome chip#451
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`lifecycle.spec.ts:61` ('selecting a welcome suggestion submits and clears
welcome state') clicks the 'Demo: render a contact form' welcome chip,
which sends the full chip value as the LLM prompt:
'Show me a contact form with fields for name, email address, subject,
and a multi-line message, plus a Send button.'
No fixture matched this prompt, so the test's fire-and-forget click left
4 'No fixture matched' / 'Background run failed' tracebacks in the
langgraph backend log every CI run since the chip was added. The test
itself passed because it didn't await the assistant response.
Add a fixture matching the substring 'contact form' (aimock's
userMessage match is includes-based) that returns a render_a2ui_surface
tool call building the contact form spec the prompt asked for. Verified
locally: lifecycle:61 now logs 'Background run succeeded' instead of
the 404 cascade.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Eliminates the recurring `No fixture matched` / `Background run failed` cascade in the langgraph backend log during every `examples/chat — e2e` CI run.
Root cause: `lifecycle.spec.ts:61` ('selecting a welcome suggestion submits and clears welcome state') clicks the 'Demo: render a contact form' welcome chip, which sends the full chip value as the LLM prompt:
No fixture matched this prompt. The test passed (it doesn't await the assistant response), but the langgraph backend kept retrying and emitting 404 tracebacks into the log on every run.
Fix
Add a fixture matching the substring `'contact form'` (aimock's `userMessage` matching is includes-based) that returns a `render_a2ui_surface` tool call building the requested contact-form spec (name / email / subject / message + Send button) — modeled directly on the existing `a2ui-surface.json` (feedback form).
Why a fixture instead of changing the test
Test plan
🤖 Generated with Claude Code