PR #2756's contract — card route always mounted regardless of
adapter.setup() outcome — lived inline in main.py's `# pragma: no cover`
boot sequence. A future refactor that re-coupled the two would have
silently bypassed PR #2756 and shipped the original "stuck booting
forever" UX again, with no pytest catching it.
This change extracts route assembly into workspace/boot_routes.py's
build_routes(card, executor, adapter_error) and pins the contract with
6 integration tests using Starlette's TestClient:
- test_card_route_serves_200_when_adapter_ready: happy path
- test_card_route_serves_200_when_adapter_failed: misconfigured boot,
card still 200, skill stubs survive
- test_jsonrpc_returns_503_when_no_executor: full -32603 envelope with
the adapter_error in error.data
- test_jsonrpc_returns_503_with_generic_when_no_error_string: fallback
reason for the rare case main.py reaches this branch without one
- test_card_route_does_not_depend_on_executor: direct PR #2756
regression guard — both branches MUST mount the card route
- test_executor_present_does_not_mount_not_configured_handler: sanity
that a healthy workspace doesn't return -32603 to every request
Conftest stubs extended with a2a.server.routes / request_handlers
classes so the tests work under the existing a2a-mock infra (pattern
matches the AgentCard/AgentSkill stubs added for PR #2765).
main.py now calls build_routes; the inline if/else is gone. Same
production behaviour, cleaner shape, regression-proof.
Heavy a2a-sdk imports inside build_routes() are lazy (deferred to the
executor-only branch) so tests that only exercise the not-configured
path don't pull DefaultRequestHandler / InMemoryTaskStore.
card_helpers + boot_routes registered in TOP_LEVEL_MODULES (build
drift gate would have caught the missing entry on the wheel-publish
smoke).
All 18 related tests pass (test_boot_routes.py: 6, test_card_helpers.py:
6, test_not_configured_handler.py: 6).
Closes#2761
Pairs with: PR #2756 (decouple agent-card from setup),
PR #2765 (defensive isolation of enrichment + transcript)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
