✅ add test clear data

Author: byron

tests/integration/store/conftest.py

@@ -9,6 +9,7 @@
 
 UUID = "store-test-{}".format(uuid.uuid4().hex)
 
+
 @pytest.fixture(scope="module")
 def store_app():
     app = dash.Dash(__name__)
@@ -30,6 +31,8 @@ def store_app():
         [State("memory", "data")],
     )
     def write_memory(modified_ts, data):
+        if data is None:
+            return ""
         return json.dumps(data)
 
     @app.callback(
@@ -43,7 +46,7 @@ def write_memory(modified_ts, data):
     def on_clear(n_clicks):
         if n_clicks is None:
             raise PreventUpdate
-        return True
+        return True, True, True
 
     @app.callback(
         [

tests/integration/store/test_clear_data.py

@@ -0,0 +1,16 @@
+def test_stcd001_clear_data_on_all_types(store_app, dash_duo):
+
+    dash_duo.start_server(store_app)
+
+    assert dash_duo.wait_for_contains_text("#output", store_app.uuid)
+
+    dash_duo.multiple_click("#btn", 3)
+    assert dash_duo.local_storage == {"n_clicks": 3}
+
+    dash_duo.find_element("#clear-btn").click()
+
+    assert (
+        not dash_duo.find_element("#output").text
+        and not dash_duo.local_storage
+        and not dash_duo.session_storage
+    ), "the clear_data should clear all data in three storage types"