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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from marionette_driver.by import By
from marionette_driver.errors import (
NoSuchElementException,
StaleElementException,
UnsupportedOperationException,
)
from marionette_harness import MarionetteTestCase
class TestShadowDom(MarionetteTestCase):
def setUp(self):
super(TestShadowDom, self).setUp()
self.marionette.set_pref("dom.webcomponents.enabled", True)
self.marionette.navigate(self.marionette.absolute_url("test_shadow_dom.html"))
self.host = self.marionette.find_element(By.ID, "host")
self.marionette.switch_to_shadow_root(self.host)
self.button = self.marionette.find_element(By.ID, "button")
def tearDown(self):
self.marionette.clear_pref("dom.webcomponents.enabled")
super(TestShadowDom, self).tearDown()
def test_chrome_error(self):
with self.marionette.using_context("chrome"):
self.assertRaises(UnsupportedOperationException,
self.marionette.switch_to_shadow_root)
def test_shadow_dom(self):
# Button in shadow root should be actionable
self.button.click()
def test_shadow_dom_after_switch_away_from_shadow_root(self):
# Button in shadow root should be actionable
self.button.click()
self.marionette.switch_to_shadow_root()
# After switching back to top content, button should be stale
self.assertRaises(StaleElementException, self.button.click)
def test_shadow_dom_raises_stale_element_exception_when_button_remove(self):
self.marionette.execute_script(
'document.getElementById("host").shadowRoot.getElementById("button").remove();')
# After removing button from shadow DOM, button should be stale
self.assertRaises(StaleElementException, self.button.click)
def test_shadow_dom_raises_stale_element_exception_when_host_removed(self):
self.marionette.execute_script('document.getElementById("host").remove();')
# After removing shadow DOM host element, button should be stale
self.assertRaises(StaleElementException, self.button.click)
def test_non_existent_shadow_dom(self):
# Jump back to top level content
self.marionette.switch_to_shadow_root()
# When no ShadowRoot is found, switch_to_shadow_root throws NoSuchElementException
self.assertRaises(NoSuchElementException, self.marionette.switch_to_shadow_root,
self.marionette.find_element(By.ID, "empty-host"))
def test_inner_shadow_dom(self):
# Button in shadow root should be actionable
self.button.click()
self.inner_host = self.marionette.find_element(By.ID, "inner-host")
self.marionette.switch_to_shadow_root(self.inner_host)
self.inner_button = self.marionette.find_element(By.ID, "inner-button")
# Nested nutton in nested shadow root should be actionable
self.inner_button.click()
self.marionette.switch_to_shadow_root()
# After jumping back to parent shadow root, button should again be actionable but inner
# button should now be stale
self.button.click()
self.assertRaises(StaleElementException, self.inner_button.click)
self.marionette.switch_to_shadow_root()
# After switching back to top content, both buttons should now be stale
self.assertRaises(StaleElementException, self.button.click)
self.assertRaises(StaleElementException, self.inner_button.click)
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