Function test_rdls003_update_title

tests/integration/renderer/test_loading_states.py:183–247

(
    dash_duo, kwargs, expected_update_title, clientside_title
)

    ],
)
def test_rdls003_update_title(
    dash_duo, kwargs, expected_update_title, clientside_title
):
    app = Dash("Dash", **kwargs)
    lock = Lock()

    app.layout = html.Div(
        children=[
            html.H3("Press button see document title updating"),
            html.Div(id="output"),
            html.Button("Update", id="button", n_clicks=0),
            html.Button("Update Page", id="page", n_clicks=0),
            html.Div(id="dummy"),
        ]
    )
    if clientside_title:
        app.clientside_callback(
            """
            function(n_clicks) {
                document.title = 'Page ' + n_clicks;
                return 'Page ' + n_clicks;
            }
            """,
            Output("dummy", "children"),
            [Input("page", "n_clicks")],
        )

    @app.callback(Output("output", "children"), [Input("button", "n_clicks")])
    def update(n):
        with lock:
            return n

    with lock:
        dash_duo.start_server(app)
        # check for update-title during startup
        # the clientside callback isn't blocking so it may update the title
        if not clientside_title:
            until(lambda: dash_duo.driver.title == expected_update_title, timeout=1)

    # check for original title after loading
    until(
        lambda: dash_duo.driver.title == "Page 0" if clientside_title else "Dash",
        timeout=1,
    )

    with lock:
        dash_duo.find_element("#button").click()
        # check for update-title while processing callback
        if clientside_title and not kwargs.get("update_title", True):
            until(lambda: dash_duo.driver.title == "Page 0", timeout=1)
        else:
            until(lambda: dash_duo.driver.title == expected_update_title, timeout=1)

    if clientside_title:
        dash_duo.find_element("#page").click()
        dash_duo.wait_for_text_to_equal("#dummy", "Page 1")
        until(lambda: dash_duo.driver.title == "Page 1", timeout=1)