import time

import pytest

pytest.importorskip("playwright")

from playwright.sync_api import expect

from panel.pane import panel
from panel.tests.util import serve_component

pytestmark = pytest.mark.ui


def test_param_defer_load(page):
    def defer_load():
        time.sleep(0.5)
        return 'I render after load!'

    component = panel(defer_load, defer_load=True)

    serve_component(page, component)

    assert page.locator(".pn-loading")

    expect(page.locator(".markdown").locator("div")).to_have_text('I render after load!\n')