Function test_inin031_initial_value_set_back

tests/integration/test_integration.py:477–508

(dash_duo)

def test_inin031_initial_value_set_back(dash_duo):
    # Test for regression on the initial value to be able to
    # set back to initial after changing again.
    app = Dash(__name__)

    app.layout = html.Div(
        [
            dcc.Dropdown(
                id="dropdown",
                options=["Toronto", "Montréal", "Vancouver"],
                value="Toronto",
                searchable=False,
            ),
            html.Div(id="output"),
        ]
    )

    @app.callback(Output("output", "children"), [Input("dropdown", "value")])
    def callback(value):
        return f"You have selected {value}"

    dash_duo.start_server(app)

    dash_duo.wait_for_text_to_equal("#output", "You have selected Toronto")

    dash_duo.select_dcc_dropdown("#dropdown", "Vancouver")
    dash_duo.wait_for_text_to_equal("#output", "You have selected Vancouver")

    dash_duo.select_dcc_dropdown("#dropdown", "Toronto")
    dash_duo.wait_for_text_to_equal("#output", "You have selected Toronto")

    assert dash_duo.get_logs() == []