Graph test that tests no duplicate id's if no id set

Author: valentijnnieman

test/test_integration.py

@@ -900,6 +900,20 @@ def test_graphs_with_different_figures(self):
 
         self.snapshot('2 graphs with different figures')
 
+    def test_graphs_without_ids(self):
+        app = dash.Dash(__name__)
+        app.layout = html.Div([
+            dcc.Graph(className='graph-no-id-1'),
+            dcc.Graph(className='graph-no-id-2'),
+        ])
+
+        self.startServer(app=app)
+
+        graph_1 = self.wait_for_element_by_css_selector('.graph-no-id-1')
+        graph_2 = self.wait_for_element_by_css_selector('.graph-no-id-2')
+
+        self.assertNotEqual(graph_1.get_attribute('id'), graph_2.get_attribute('id'))
+
     def test_datepickerrange_updatemodes(self):
         app = dash.Dash(__name__)