adding signal-handling test

tests/server/test_server.py

@@ -0,0 +1,35 @@
+import signal
+
+from pytest_mock import MockerFixture
+
+import pydase
+
+
+def test_signal_handling(mocker: MockerFixture):
+    # Mock os._exit and signal.signal
+    mock_exit = mocker.patch("os._exit")
+    mock_signal = mocker.patch("signal.signal")
+
+    class MyService(pydase.DataService):
+        pass
+
+    # Instantiate your server object
+    server = pydase.Server(MyService())
+
+    # Call the method to install signal handlers
+    server.install_signal_handlers()
+
+    # Check if the signal handlers were registered correctly
+    assert mock_signal.call_args_list == [
+        mocker.call(signal.SIGINT, server.handle_exit),
+        mocker.call(signal.SIGTERM, server.handle_exit),
+    ]
+
+    # Simulate receiving a SIGINT signal for the first time
+    server.handle_exit(signal.SIGINT, None)
+    assert server.should_exit  # assuming should_exit is public
+    mock_exit.assert_not_called()
+
+    # Simulate receiving a SIGINT signal for the second time
+    server.handle_exit(signal.SIGINT, None)
+    mock_exit.assert_called_once_with(1)