src/cobalt/black_box_tests/tests/preload_visibility.py

"""Set a JS timer that expires after exiting preload mode."""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import _env  # pylint: disable=unused-import

from cobalt.black_box_tests import black_box_tests


class PreloadVisibilityTest(black_box_tests.BlackBoxTestCase):

  def test_simple(self):

    url = self.GetURL(file_name='preload_visibility.html')

    with self.CreateCobaltRunner(
        url=url, target_params=['--preload']) as runner:
      runner.WaitForJSTestsSetup()
      self.assertTrue(runner.IsInPreload())
      runner.SendResume()
      self.assertTrue(runner.JSTestsSucceeded())