decomposer: generate deliverable files for Define the service contract and project architecture for the FastAPI endpoint monitoring service.; Implement the typed monitor CRUD API and concurrency-safe in-memory state according to the service design.; Implement secure on-demand endpoint checks with status updates, latency measurement, robust error handling, and redacted structured logs.; Add operational API endpoints and environment-driven runtime configuration to the monitoring service.; Create automated tests for the monitoring service.; Package the service with Docker and developer documentation.; Validate the complete project.

tests/conftest.py

@@ -1 +1,36 @@
-# Env var setup that must run before app.config is imported.
+from collections.abc import AsyncIterator, Awaitable, Callable
+
+import httpx
+import pytest
+
+from app.api import create_app
+from app.checker import EndpointChecker
+from app.config import Settings
+
+
+async def public_resolver(_: str, __: int) -> list[str]:
+    return ["93.184.216.34"]
+
+
+@pytest.fixture
+def client_factory() -> Callable[[httpx.AsyncBaseTransport], Awaitable[httpx.AsyncClient]]:
+    async def make(transport: httpx.AsyncBaseTransport) -> httpx.AsyncClient:
+        checker = EndpointChecker(1, 3, resolver=public_resolver, transport=transport)
+        app = create_app(Settings(), checker=checker)
+        return httpx.AsyncClient(
+            transport=httpx.ASGITransport(app=app), base_url="http://test"
+        )
+
+    return make
+
+
+@pytest.fixture
+async def client(
+    client_factory: Callable[[httpx.AsyncBaseTransport], Awaitable[httpx.AsyncClient]],
+) -> AsyncIterator[httpx.AsyncClient]:
+    async def handler(_: httpx.Request) -> httpx.Response:
+        return httpx.Response(200)
+
+    value = await client_factory(httpx.MockTransport(handler))
+    async with value:
+        yield value