refactor(bec-progressbar): add private method for bec_progressbar, udate client file

bec_widgets/cli/client.py

@@ -470,6 +470,12 @@ class BECProgressBar(RPCBase):
         >>> progressbar.label_template = "$value / $percentage %"
         """
 
+    @rpc_call
+    def _get_label(self) -> str:
+        """
+        Return the label text. mostly used for testing rpc.
+        """
+
 
 class BECQueue(RPCBase):
     """Widget to display the BEC queue."""

bec_widgets/widgets/progress/bec_progressbar/bec_progressbar.py

@@ -21,6 +21,7 @@ class BECProgressBar(BECWidget, QWidget):
         "set_minimum",
         "label_template",
         "label_template.setter",
+        "_get_label",
     ]
     ICON_NAME = "page_control"
 
@@ -235,6 +236,10 @@ class BECProgressBar(BECWidget, QWidget):
             (value - self._user_minimum) / (self._user_maximum - self._user_minimum) * self._maximum
         )
 
+    def _get_label(self) -> str:
+        """Return the label text. mostly used for testing rpc."""
+        return self.center_label.text()
+
 
 if __name__ == "__main__":  # pragma: no cover
     app = QApplication(sys.argv)