feat: implement slot_error_boundary decorator and add unit tests for session and device controllers

src/pygui/backend/controllers/device_controller.py

@@ -12,6 +12,7 @@ from PySide6.QtCore import Property, QObject, Qt, Signal, Slot
 from pygui.backend.controllers.session_controller import SessionController
 from pygui.backend.data.local_settings import LocalSettings
 from pygui.backend.models.data_model import TemperatureTableModel
+from pygui.backend.utils import slot_error_boundary
 from pygui.backend.visualization.graph_view import GraphView
 from pygui.serialcomm.data_parser import (
     convert_to_temperatures,
@@ -116,6 +117,7 @@ class DeviceController(QObject):
         return self._save_data_dir
 
     @Slot(str)
+    @slot_error_boundary
     def setSaveDataDir(self, path: str) -> None:
         """Set the directory for saving parsed CSV data files."""
         self._save_data_dir = path
@@ -128,6 +130,7 @@ class DeviceController(QObject):
         return self._selected_port
 
     @Slot(str)
+    @slot_error_boundary
     def setSelectedPort(self, port: str) -> None:
         """Set the active serial port from the port selector."""
         self._selected_port = port
@@ -170,6 +173,7 @@ class DeviceController(QObject):
         return self._graph_view
 
     @Slot(result=object)
+    @slot_error_boundary
     def getChartData(self) -> dict[str, Any]:
         """Extract chart-ready data from the current model.
 
@@ -208,6 +212,7 @@ class DeviceController(QObject):
         self.activityLogUpdated.emit("\n".join(self._activity_log))
 
     @Slot()
+    @slot_error_boundary
     def clearActivityLog(self) -> None:
         """Clear the activity log."""
         self._activity_log.clear()
@@ -215,6 +220,7 @@ class DeviceController(QObject):
         self._save_status()
 
     @Slot()
+    @slot_error_boundary
     def clearSession(self) -> None:
         """Clear the current session state, allowing a clean detect."""
         self._connection_status = "Disconnected"
@@ -242,6 +248,7 @@ class DeviceController(QObject):
     # ---- Public Slots ----
 
     @Slot()
+    @slot_error_boundary
     def refreshPorts(self) -> None:
         """Scan for available serial ports and emit updated list."""
         ports = self._service.enumerate_ports()
@@ -251,6 +258,7 @@ class DeviceController(QObject):
         self._save_status()
 
     @Slot()
+    @slot_error_boundary
     def detectWafer(self) -> None:
         """Scan all serial ports for a wafer (runs in background thread).
 
@@ -280,6 +288,7 @@ class DeviceController(QObject):
         self._detectFinished.emit(port, info)
 
     @Slot(object, object)
+    @slot_error_boundary
     def _handle_detect_finished(
         self, port: Optional[str], info: Optional[WaferInfo]
     ) -> None:
@@ -304,6 +313,7 @@ class DeviceController(QObject):
         self._set_operation_progress(False)
 
     @Slot()
+    @slot_error_boundary
     def readMemoryAsync(self) -> None:
         """Read wafer memory in a background thread.
 
@@ -346,6 +356,7 @@ class DeviceController(QObject):
         self._readFinished.emit(port, family_code, data)
 
     @Slot(str, str, object)
+    @slot_error_boundary
     def _handle_read_finished(
         self, port: str, family_code: str, data: Optional[bytes]
     ) -> None:
@@ -367,6 +378,7 @@ class DeviceController(QObject):
         self._save_status()
 
     @Slot(str)
+    @slot_error_boundary
     def eraseMemory(self, port: str) -> None:
         """Send p1 erase command."""
         self._set_operation_progress(True)
@@ -385,6 +397,7 @@ class DeviceController(QObject):
         self._set_operation_progress(False)
 
     @Slot(str)
+    @slot_error_boundary
     def readDebug(self, port: str) -> None:
         """Read both D1 (sensor) and F1 (debug/cold-junction) data.
 
@@ -428,6 +441,7 @@ class DeviceController(QObject):
         self._set_operation_progress(False)
 
     @Slot(str, str)
+    @slot_error_boundary
     def parseAndSaveData(self, family_code: str = "", port: str = "") -> None:
         """Parse raw bytes into temperatures and save to CSV.