merge: testing → main (reconcile 2-week divergence)

tests/bus/test_worker.py

@@ -0,0 +1,68 @@
+"""Tests for :func:`decnet.bus.worker.bus_worker` lifecycle + heartbeat."""
+from __future__ import annotations
+
+import asyncio
+import pathlib
+
+import pytest
+
+from decnet.bus import topics
+from decnet.bus.unix_client import UnixSocketBus
+from decnet.bus.worker import bus_worker
+
+
+class TestBusWorker:
+    async def test_worker_serves_and_heartbeats(
+        self, tmp_path: pathlib.Path,
+    ) -> None:
+        sock = tmp_path / "bus.sock"
+        task = asyncio.create_task(
+            bus_worker(sock, group=None, heartbeat_interval=1),
+        )
+        # Wait for the socket to exist.
+        for _ in range(40):
+            if sock.exists():
+                break
+            await asyncio.sleep(0.05)
+        assert sock.exists(), "bus worker did not create socket"
+
+        client = UnixSocketBus(sock, client_name="hb-watcher")
+        await client.connect()
+        sub = client.subscribe(topics.system(topics.SYSTEM_BUS_HEALTH))
+        try:
+            async with sub:
+                async with asyncio.timeout(3.0):
+                    async for event in sub:
+                        assert event.topic == "system.bus.health"
+                        assert "pid" in event.payload
+                        break
+        finally:
+            await client.close()
+            task.cancel()
+            try:
+                await task
+            except asyncio.CancelledError:
+                pass
+
+    async def test_worker_creates_home_fallback_parent(
+        self, tmp_path: pathlib.Path, monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        # Point Path.home() at tmp_path so the "auto-mkdir ~/.decnet" branch
+        # activates without touching the real home directory.
+        monkeypatch.setattr(pathlib.Path, "home", classmethod(lambda cls: tmp_path))
+        sock = tmp_path / ".decnet" / "bus.sock"
+        task = asyncio.create_task(
+            bus_worker(sock, group=None, heartbeat_interval=60),
+        )
+        try:
+            for _ in range(40):
+                if sock.exists():
+                    break
+                await asyncio.sleep(0.05)
+            assert sock.exists()
+        finally:
+            task.cancel()
+            try:
+                await task
+            except asyncio.CancelledError:
+                pass