fix: monitor.py replots last scan after changing config with new signals; config_dialog.py checks if the new config is valid with BEC

tests/test_config_dialog.py

@@ -1,4 +1,6 @@
 import os
+from unittest.mock import MagicMock
+
 import yaml
 
 import pytest
@@ -15,9 +17,73 @@ def load_test_config(config_name):
     return config
 
 
+class FakeDevice:
+    """Fake minimal positioner class for testing."""
+
+    def __init__(self, name, enabled=True):
+        self.name = name
+        self.enabled = enabled
+        self.signals = {self.name: {"value": 1.0}}
+        self.description = {self.name: {"source": self.name}}
+
+    def __contains__(self, item):
+        return item == self.name
+
+    @property
+    def _hints(self):
+        return [self.name]
+
+    def set_value(self, fake_value: float = 1.0) -> None:
+        """
+        Setup fake value for device readout
+        Args:
+            fake_value(float): Desired fake value
+        """
+        self.signals[self.name]["value"] = fake_value
+
+    def describe(self) -> dict:
+        """
+        Get the description of the device
+        Returns:
+            dict: Description of the device
+        """
+        return self.description
+
+
+def get_mocked_device(device_name: str):
+    """
+    Helper function to mock the devices
+    Args:
+        device_name(str): Name of the device to mock
+    """
+    return FakeDevice(name=device_name, enabled=True)
+
+
 @pytest.fixture(scope="function")
-def config_dialog(qtbot):
-    widget = ConfigDialog()
+def mocked_client():
+    # Create a dictionary of mocked devices
+    device_names = ["samx", "gauss_bpm", "gauss_adc1", "gauss_adc2", "gauss_adc3", "bpm4i"]
+    mocked_devices = {name: get_mocked_device(name) for name in device_names}
+
+    # Create a MagicMock object
+    client = MagicMock()
+
+    # Mock the device_manager.devices attribute
+    client.device_manager.devices = MagicMock()
+    client.device_manager.devices.__getitem__.side_effect = lambda x: mocked_devices.get(x)
+    client.device_manager.devices.__contains__.side_effect = lambda x: x in mocked_devices
+
+    # Set each device as an attribute of the mock
+    for name, device in mocked_devices.items():
+        setattr(client.device_manager.devices, name, device)
+
+    return client
+
+
+@pytest.fixture(scope="function")
+def config_dialog(qtbot, mocked_client):
+    client = mocked_client
+    widget = ConfigDialog(client=client)
     qtbot.addWidget(widget)
     qtbot.waitExposed(widget)
     yield widget