Add transitiontime to hue scene service (#45785)

tests/components/hue/test_bridge.py

@@ -192,6 +192,41 @@ async def test_hue_activate_scene(hass, mock_api):
     assert mock_api.mock_requests[2]["path"] == "groups/group_1/action"
 
 
+async def test_hue_activate_scene_transition(hass, mock_api):
+    """Test successful hue_activate_scene with transition."""
+    config_entry = config_entries.ConfigEntry(
+        1,
+        hue.DOMAIN,
+        "Mock Title",
+        {"host": "mock-host", "username": "mock-username"},
+        "test",
+        config_entries.CONN_CLASS_LOCAL_POLL,
+        system_options={},
+        options={CONF_ALLOW_HUE_GROUPS: True, CONF_ALLOW_UNREACHABLE: False},
+    )
+    hue_bridge = bridge.HueBridge(hass, config_entry)
+
+    mock_api.mock_group_responses.append(GROUP_RESPONSE)
+    mock_api.mock_scene_responses.append(SCENE_RESPONSE)
+
+    with patch("aiohue.Bridge", return_value=mock_api), patch.object(
+        hass.config_entries, "async_forward_entry_setup"
+    ):
+        assert await hue_bridge.async_setup() is True
+
+    assert hue_bridge.api is mock_api
+
+    call = Mock()
+    call.data = {"group_name": "Group 1", "scene_name": "Cozy dinner", "transition": 30}
+    with patch("aiohue.Bridge", return_value=mock_api):
+        assert await hue_bridge.hue_activate_scene(call) is None
+
+    assert len(mock_api.mock_requests) == 3
+    assert mock_api.mock_requests[2]["json"]["scene"] == "scene_1"
+    assert mock_api.mock_requests[2]["json"]["transitiontime"] == 30
+    assert mock_api.mock_requests[2]["path"] == "groups/group_1/action"
+
+
 async def test_hue_activate_scene_group_not_found(hass, mock_api):
     """Test failed hue_activate_scene due to missing group."""
     config_entry = config_entries.ConfigEntry(