fix(device browser): mocks and utils for tests

bec_widgets/utils/expandable_frame.py

@@ -20,7 +20,9 @@ class ExpandableGroupFrame(QFrame):
     EXPANDED_ICON_NAME: str = "collapse_all"
     COLLAPSED_ICON_NAME: str = "expand_all"
 
-    def __init__(self, title: str, parent: QWidget | None = None, expanded: bool = True) -> None:
+    def __init__(
+        self, title: str, parent: QWidget | None = None, expanded: bool = True, icon: str = ""
+    ) -> None:
         super().__init__(parent=parent)
         self._expanded = expanded
 
@@ -29,13 +31,21 @@ class ExpandableGroupFrame(QFrame):
         self._layout = QVBoxLayout()
         self._layout.setContentsMargins(0, 0, 0, 0)
         self.setLayout(self._layout)
+
         self._title_layout = QHBoxLayout()
         self._layout.addLayout(self._title_layout)
-        self._expansion_button = QToolButton()
-        self._update_icon()
+
         self._title = QLabel(f"<b>{title}</b>")
-        self._title_layout.addWidget(self._expansion_button)
+        self._title_icon = QLabel()
+        self._title_layout.addWidget(self._title_icon)
         self._title_layout.addWidget(self._title)
+        self.icon_name = icon
+
+        self._title_layout.addStretch(1)
+
+        self._expansion_button = QToolButton()
+        self._update_expansion_icon()
+        self._title_layout.addWidget(self._expansion_button, stretch=1)
 
         self._contents = QWidget(self)
         self._layout.addWidget(self._contents)
@@ -50,7 +60,7 @@ class ExpandableGroupFrame(QFrame):
     @SafeSlot()
     def switch_expanded_state(self):
         self.expanded = not self.expanded  # type: ignore
-        self._update_icon()
+        self._update_expansion_icon()
 
     @SafeProperty(bool)
     def expanded(self):  # type: ignore
@@ -62,7 +72,7 @@ class ExpandableGroupFrame(QFrame):
         self._contents.setVisible(expanded)
         self.updateGeometry()
 
-    def _update_icon(self):
+    def _update_expansion_icon(self):
         self._expansion_button.setIcon(
             material_icon(icon_name=self.EXPANDED_ICON_NAME, size=(10, 10), convert_to_pixmap=False)
             if self.expanded
@@ -70,3 +80,21 @@ class ExpandableGroupFrame(QFrame):
                 icon_name=self.COLLAPSED_ICON_NAME, size=(10, 10), convert_to_pixmap=False
             )
         )
+
+    @SafeProperty(str)
+    def icon_name(self):  # type: ignore
+        return self._title_icon_name
+
+    @icon_name.setter
+    def icon_name(self, icon_name: str):
+        self._title_icon_name = icon_name
+        self._set_title_icon(self._title_icon_name)
+
+    def _set_title_icon(self, icon_name: str):
+        if icon_name:
+            self._title_icon.setVisible(True)
+            self._title_icon.setPixmap(
+                material_icon(icon_name=icon_name, size=(20, 20), convert_to_pixmap=True)
+            )
+        else:
+            self._title_icon.setVisible(False)