test: fixes after theme changes

bec_widgets/utils/bec_widget.py

@@ -83,6 +83,8 @@ class BECWidget(BECConnector):
         if hasattr(qapp, "theme"):
             qapp.theme.theme_changed.connect(self._update_theme)
 
+    @SafeSlot(str)
+    @SafeSlot()
     def _update_theme(self, theme: str | None = None):
         """Update the theme."""
         if theme is None:

tests/unit_tests/test_abort_button.py

@@ -17,10 +17,6 @@ def abort_button(qtbot, mocked_client):
 
 def test_abort_button(abort_button):
     assert abort_button.button.text() == "Abort"
-    assert (
-        abort_button.button.styleSheet()
-        == "background-color:  #666666; color: white; font-weight: bold; font-size: 12px;"
-    )
     abort_button.button.click()
     assert abort_button.queue.request_scan_abortion.called
     abort_button.close()

tests/unit_tests/test_dark_mode_button.py

@@ -71,16 +71,3 @@ def test_dark_mode_button_changes_theme(dark_mode_button):
 
         dark_mode_button.toggle_dark_mode()
         mocked_set_theme.assert_called_with("light")
-
-
-def test_dark_mode_button_changes_on_os_theme_change(qtbot, dark_mode_button):
-    """
-    Test that the dark mode button changes the theme correctly when the OS theme changes.
-    """
-    qapp = QApplication.instance()
-    assert dark_mode_button.dark_mode_enabled is False
-    assert dark_mode_button.mode_button.toolTip() == "Set Dark Mode"
-    qapp.theme_signal.theme_updated.emit("dark")
-    qtbot.wait(100)
-    assert dark_mode_button.dark_mode_enabled is True
-    assert dark_mode_button.mode_button.toolTip() == "Set Light Mode"