add api do not return webcam list test

tests/test_camera.py

@@ -114,7 +114,7 @@ async def test_setup_thumbnail_camera(hass, get_data):
     assert entry is not None
 
 
-async def test_hardcoded_camera(hass, get_default_api_response):
+async def test_hardcoded_camera_empty_list(hass, get_default_api_response):
     """Test hardcoded camera"""
     get_default_api_response["webcams"] = []
 
@@ -129,6 +129,21 @@ async def test_hardcoded_camera(hass, get_default_api_response):
     assert entry is not None
 
 
+async def test_hardcoded_camera_API_error(hass, get_default_api_response):
+    """Test hardcoded camera"""
+    get_default_api_response["webcams"] = None
+
+    config_entry = MockConfigEntry(domain=DOMAIN, data=MOCK_CONFIG, entry_id="test")
+    config_entry.add_to_hass(hass)
+    assert await async_setup_entry(hass, config_entry)
+    await hass.async_block_till_done()
+
+    entity_registry = er.async_get(hass)
+    entry = entity_registry.async_get("camera.mainsail_webcam")
+
+    assert entry is not None
+
+
 async def test_thumbnail_camera_image(
     hass, aioclient_mock, get_data, _moonraker_default_mock
 ):