fix(busy-loader): adjust busy loader and tests

tests/unit_tests/test_busy_loader.py

@@ -1,3 +1,4 @@
+import numpy as np
 import pytest
 from qtpy.QtWidgets import QLabel, QVBoxLayout, QWidget
 
@@ -68,6 +69,24 @@ def test_becwidget_set_busy_toggle_and_text(qtbot, widget_idle):
     qtbot.waitUntil(lambda: overlay.isHidden())
 
 
+def test_becwidget_busy_overlay_set_opacity(qtbot, widget_busy):
+    overlay = getattr(widget_busy, "_busy_overlay")
+    qtbot.waitUntil(lambda: overlay.isVisible())
+
+    # Default opacity is 0.7
+    frame = getattr(overlay, "_frame", None)
+    assert frame is not None
+    sheet = frame.styleSheet()
+    _, _, _, a = overlay.scrim_color.getRgb()
+    assert np.isclose(a / 255, 0.35, atol=0.02)
+
+    # Change opacity
+    overlay.set_opacity(0.7)
+    qtbot.waitUntil(lambda: overlay.isVisible())
+    _, _, _, a = overlay.scrim_color.getRgb()
+    assert np.isclose(a / 255, 0.7, atol=0.02)
+
+
 def test_becwidget_overlay_tracks_resize(qtbot, widget_busy):
     overlay = getattr(widget_busy, "_busy_overlay")
     qtbot.waitUntil(lambda: overlay.geometry() == widget_busy.rect())

tests/unit_tests/test_device_manager_view.py

@@ -23,6 +23,7 @@ from bec_widgets.applications.views.device_manager_view.device_manager_dialogs.u
     ValidationSection,
 )
 from bec_widgets.applications.views.device_manager_view.device_manager_display_widget import (
+    CustomBusyWidget,
     DeviceManagerDisplayWidget,
 )
 from bec_widgets.applications.views.device_manager_view.device_manager_view import (
@@ -592,6 +593,14 @@ class TestDeviceManagerView:
             qtbot.waitExposed(widget)
             yield widget
 
+    @pytest.fixture
+    def custom_busy(self, qtbot, mocked_client):
+        """Fixture for the custom busy widget of the DeviceManagerDisplayWidget."""
+        widget = CustomBusyWidget(client=mocked_client)
+        qtbot.addWidget(widget)
+        qtbot.waitExposed(widget)
+        yield widget
+
     @pytest.fixture
     def device_configs(self, device_config: dict):
         """Fixture for multiple device configurations."""