Expanded integration coverage and enforced test categories.

tests/integration/cli/test_systemd_notify.py

@@ -0,0 +1,89 @@
+# Copyright 2026 Logan Fick
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Integration tests for systemd notification socket behavior."""
+
+import logging
+import os
+import socket
+import sys
+from typing import TYPE_CHECKING
+
+import pytest
+
+from crabstero.cli import _sd_notify
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
+pytestmark = pytest.mark.skipif(
+    os.name != "posix" or not hasattr(socket, "AF_UNIX"),
+    reason="systemd notification sockets require Unix-domain socket support",
+)
+
+
+class TestSystemdNotifySocket:
+    """Systemd notification helper behavior against real Unix-domain sockets."""
+
+    def test_sd_notify_sends_datagram(
+        self,
+        tmp_path: Path,
+        monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        """_sd_notify sends the payload to NOTIFY_SOCKET."""
+        socket_path = tmp_path / "notify.sock"
+
+        with socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM) as server:
+            server.bind(str(socket_path))
+            server.settimeout(1)
+            monkeypatch.setenv("NOTIFY_SOCKET", str(socket_path))
+
+            _sd_notify("READY=1")
+
+            assert server.recv(1024) == b"READY=1"
+
+    def test_sd_notify_ignores_socket_errors(
+        self,
+        tmp_path: Path,
+        monkeypatch: pytest.MonkeyPatch,
+        caplog: pytest.LogCaptureFixture,
+    ) -> None:
+        """_sd_notify logs and suppresses notification socket send failures."""
+        monkeypatch.setenv("NOTIFY_SOCKET", str(tmp_path / "missing.sock"))
+
+        with caplog.at_level(logging.DEBUG, logger="crabstero"):
+            _sd_notify("READY=1")
+
+        assert "Could not send systemd notification" in caplog.text
+
+    @pytest.mark.skipif(
+        sys.platform != "linux",
+        reason="abstract Unix sockets are Linux-specific",
+    )
+    def test_sd_notify_sends_to_abstract_socket(
+        self,
+        monkeypatch: pytest.MonkeyPatch,
+    ) -> None:
+        """@-prefixed NOTIFY_SOCKET values target Linux abstract sockets."""
+        socket_name = f"crabstero-notify-{os.getpid()}"
+
+        with socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM) as server:
+            server.bind(f"\0{socket_name}")
+            server.settimeout(1)
+            monkeypatch.setenv("NOTIFY_SOCKET", f"@{socket_name}")
+
+            _sd_notify("READY=1")
+
+            assert server.recv(1024) == b"READY=1"