fix(rpc_server): pass cli config to server

tests/unit_tests/test_client_utils.py

@@ -3,6 +3,7 @@ from unittest import mock
 import pytest
 
 from bec_widgets.cli.client import BECFigure
+from bec_widgets.cli.client_utils import BECGuiClientMixin, _start_plot_process
 
 from .client_mocks import FakeDevice
 
@@ -27,3 +28,49 @@ def test_rpc_call_accepts_device_as_input(cli_figure):
     fig, mock_rpc_call = cli_figure
     fig.plot(x_name=dev1, y_name=dev2)
     mock_rpc_call.assert_called_with("plot", x_name="samx", y_name="bpm4i")
+
+
+@pytest.mark.parametrize(
+    "config, call_config",
+    [
+        (None, None),
+        ("/path/to/config.yml", "/path/to/config.yml"),
+        ({"key": "value"}, '{"key": "value"}'),
+    ],
+)
+def test_client_utils_start_plot_process(config, call_config):
+    with mock.patch("bec_widgets.cli.client_utils.subprocess.Popen") as mock_popen:
+        _start_plot_process("gui_id", BECFigure, config)
+        command = ["bec-gui-server", "--id", "gui_id", "--gui_class", "BECFigure"]
+        if call_config:
+            command.extend(["--config", call_config])
+        mock_popen.assert_called_once_with(
+            command,
+            text=True,
+            start_new_session=True,
+            stdout=mock.ANY,
+            stderr=mock.ANY,
+            env=mock.ANY,
+        )
+
+
+def test_client_utils_passes_client_config_to_server(bec_dispatcher):
+    """
+    Test that the client config is passed to the server. This ensures that
+    changes to the client config (either through config files or plugins) are
+    reflected in the server.
+    """
+    mixin = BECGuiClientMixin()
+    mixin._client = bec_dispatcher.client
+    mixin._gui_id = "gui_id"
+    mixin.gui_is_alive = mock.MagicMock()
+    mixin.gui_is_alive.side_effect = [True]
+
+    with mock.patch("bec_widgets.cli.client_utils._start_plot_process") as mock_start_plot:
+        with mock.patch.object(mixin, "_start_update_script") as mock_start_update:
+            mock_start_plot.return_value = [mock.MagicMock(), mock.MagicMock()]
+            mixin.show()
+            mock_start_plot.assert_called_once_with(
+                "gui_id", BECGuiClientMixin, mixin._client._service_config.config
+            )
+            mock_start_update.assert_called_once()