Add history_graph component to demo (#12681)

homeassistant/components/demo.py

@@ -118,6 +118,17 @@ def async_setup(hass, config):
 
     tasks2 = []
 
+    # Set up history graph
+    tasks2.append(bootstrap.async_setup_component(
+        hass, 'history_graph',
+        {'history_graph': {'switches': {
+            'name': 'Recent Switches',
+            'entities': switches,
+            'hours_to_show': 1,
+            'refresh': 60
+        }}}
+    ))
+
     # Set up scripts
     tasks2.append(bootstrap.async_setup_component(
         hass, 'script',

tests/components/test_demo.py

@@ -10,6 +10,12 @@ from homeassistant.components import demo, device_tracker
 from homeassistant.remote import JSONEncoder
 
 
+@pytest.fixture(autouse=True)
+def mock_history(hass):
+    """Mock history component loaded."""
+    hass.config.components.add('history')
+
+
 @pytest.fixture
 def minimize_demo_platforms(hass):
     """Cleanup demo component for tests."""