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

src/pygui/backend/controllers/session_controller.py

@@ -14,6 +14,7 @@ from pygui.backend.models.frame_player import FramePlayer, frames_from_wafer_dat
 from pygui.backend.models.sensor_editor import SensorEditor
 from pygui.backend.models.session_model import SessionModel
 from pygui.backend.models.threshold_classifier import ThresholdConfig
+from pygui.backend.utils import slot_error_boundary
 from pygui.backend.wafer.zwafer_models import Sensor
 from pygui.backend.wafer.zwafer_parser import ZWaferParser
 from pygui.serialcomm.stream_reader import StreamReader
@@ -182,6 +183,7 @@ class SessionController(QObject):
 
     # ---- mode + thresholds ----
     @Slot(str)
+    @slot_error_boundary
     def setMode(self, mode: str) -> None:
         if mode == self._mode:
             return
@@ -191,6 +193,7 @@ class SessionController(QObject):
         self.modeChanged.emit()
 
     @Slot(float, float, bool)
+    @slot_error_boundary
     def setThresholds(self, set_point: float, margin: float, auto: bool) -> None:
         self._model.set_thresholds(ThresholdConfig(set_point, margin, auto))
         if self._last:                     # re-band current frame in place
@@ -198,6 +201,7 @@ class SessionController(QObject):
 
     # ---- review: file load + playback ----
     @Slot(str)
+    @slot_error_boundary
     def loadFile(self, file_path: str) -> None:
         from pathlib import Path
 
@@ -250,30 +254,37 @@ class SessionController(QObject):
         self._emit_current()
 
     @Slot()
+    @slot_error_boundary
     def play(self) -> None:
         self._play_timer.start(self._next_interval_ms())
 
     @Slot()
-    def pause(self) -> None: self._play_timer.stop()
+    @slot_error_boundary
+    def pause(self) -> None:
+        self._play_timer.stop()
 
     @Slot()
+    @slot_error_boundary
     def stop(self) -> None:
         self._play_timer.stop()
         self._player.seek(0)
         self._emit_current()
 
     @Slot(int)
+    @slot_error_boundary
     def step(self, delta: int) -> None:
         self._play_timer.stop()
         self._player.step(delta)
         self._emit_current()
 
     @Slot(int)
+    @slot_error_boundary
     def seek(self, i: int) -> None:
         self._player.seek(i)
         self._emit_current()
 
     @Slot(float)
+    @slot_error_boundary
     def setSpeed(self, x: float) -> None:
         self._speed = max(0.1, x)
         if self._play_timer.isActive():
@@ -325,6 +336,7 @@ class SessionController(QObject):
 
     # ---- live: stream start/stop ----
     @Slot(str, str)
+    @slot_error_boundary
     def startStream(self, port: str, family_code: str = "") -> None:
 
         from pygui.backend.wafer.wafer_layouts import load_layout_for_wafer_id
@@ -389,6 +401,7 @@ class SessionController(QObject):
         self.stateChanged.emit()
 
     @Slot()
+    @slot_error_boundary
     def stopStream(self) -> None:
         self._repaint_timer.stop()
         if self._reader:
@@ -409,6 +422,7 @@ class SessionController(QObject):
         self.stopRecording()
 
     @Slot(object)
+    @slot_error_boundary
     def _on_live_frame(self, frame: Frame) -> None:
         # Main thread (queued). Record raw, process edited; mark dirty for repaint.
         self._last_raw_frame = frame
@@ -428,35 +442,41 @@ class SessionController(QObject):
 
     # ---- recording ----
     @Slot(str, str)
+    @slot_error_boundary
     def startRecording(self, path: str, serial: str = "") -> None:
         self._recorder.start(path, self._sensors, serial)
         self.recordingChanged.emit()
 
     @Slot()
+    @slot_error_boundary
     def stopRecording(self) -> None:
         if self._recorder.is_recording:
             self._recorder.stop()
             self.recordingChanged.emit()
 
     @Slot(int, float)
+    @slot_error_boundary
     def replaceSensor(self, index: int, value: float) -> None:
         """Override sensor `index` to display `value` every frame."""
         self._sensor_editor.set_replacement(index, value)
         self._reprocess_current()
 
     @Slot(int, float)
+    @slot_error_boundary
     def offsetSensor(self, index: int, delta: float) -> None:
         """Shift sensor `index` by `delta` every frame."""
         self._sensor_editor.set_offset(index, delta)
         self._reprocess_current()
 
     @Slot(int)
+    @slot_error_boundary
     def clearSensorEdit(self, index: int) -> None:
         """Remove all overrides for sensor `index`."""
         self._sensor_editor.clear(index)
         self._reprocess_current()
 
     @Slot()
+    @slot_error_boundary
     def clearSensorEdits(self) -> None:
         """Remove all sensor overrides."""
         self._sensor_editor.clear()