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# Copyright 2015 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import utils
from autotest_lib.client.common_lib import error
from autotest_lib.client.cros.enterprise import enterprise_policy_base
class policy_ImagesAllowedForUrls(enterprise_policy_base.EnterprisePolicyTest):
"""Test ImagesAllowedForUrls policy effect on CrOS look & feel.
This test verifies the behavior of Chrome OS with a range of valid values
for the ImagesAllowedForUrls user policies. These values are covered by
four test cases, named: NotSet_Block, 1Url_Allow, 2Urls_Block, and
When the policy value is None (as in case=NotSet_Block), then images are
blocked on any page. When the value is set to a single domain (such as
case=1Url_Allow), images are allowed on any page with that domain. When
set to multiple domains (as in case=2Urls_Block or 3Urls_Allow), then
images are allowed on any page with a domain that matches any of the
listed domains.
Two test cases (1Url_Allow, 3Urls_Allow) are designed to allow images
to be shown on the test page. The other two test cases (NotSet_Block,
2Urls_Block) are designed to block images on the test page.
Note this test has a dependency on the DefaultImagesSetting policy, which
is partially tested herein, and by the test policy_ImagesBlockedForUrls.
For this test, we set DefaultImagesSetting=2. This blocks images on all
pages except those with a domain listed in ImagesAllowedForUrls. For the
test policy_ImagesBlockedForUrls, we set DefaultImagesSetting=1. That
allows images to be shown on all pages except those with domains listed in
version = 1
def initialize(self, **kwargs):
"""Initialize this test."""
super(policy_ImagesAllowedForUrls, self).initialize(**kwargs)
def _initialize_test_constants(self):
"""Initialize test-specific constants, some from class constants."""
self.POLICY_NAME = 'ImagesAllowedForUrls'
self.TEST_FILE = 'kittens.html'
self.TEST_URL = '%s/%s' % (self.WEB_HOST, self.TEST_FILE)
self.URL1_DATA = [self.WEB_HOST]
self.URL2_DATA = ['', '']
self.URL3_DATA = ['', self.WEB_HOST,
self.TEST_CASES = {
'NotSet_Block': None,
'1Url_Allow': self.URL1_DATA,
'2Urls_Block': self.URL2_DATA,
'3Urls_Allow': self.URL3_DATA
self.STARTUP_URLS = ['chrome://policy', 'chrome://settings']
'DefaultImagesSetting': 2,
'BookmarkBarEnabled': False,
'RestoreOnStartupURLs': self.STARTUP_URLS,
'RestoreOnStartup': 4
def _wait_for_page_ready(self, tab):
lambda: tab.EvaluateJavaScript('pageReady'),
exception=error.TestError('Test page is not ready.'))
def _is_image_blocked(self, tab):
image_width = tab.EvaluateJavaScript(
return image_width < self.MINIMUM_IMAGE_WIDTH
def _test_images_allowed_for_urls(self, policy_value):
"""Verify CrOS enforces the ImagesAllowedForUrls policy.
When ImagesAllowedForUrls is undefined, images shall be blocked on
all pages. When ImagesAllowedForUrls contains one or more URLs, images
shall be shown only on the pages whose domain matches any of the
listed domains.
@param policy_value: policy value for this case.
tab = self.navigate_to_url(self.TEST_URL)
image_is_blocked = self._is_image_blocked(tab)
# String |WEB_HOST| shall be found in string |policy_value| for test
# cases 1Url_Allow and 3Urls_Allow, but not for NotSet_Block and
# 2Urls_Block.
if policy_value is not None and self.WEB_HOST in policy_value:
if image_is_blocked:
raise error.TestFail('Image should not be blocked.')
if not image_is_blocked:
raise error.TestFail('Image should be blocked.')
def run_once(self, case):
"""Setup and run the test configured for the specified test case.
@param case: Name of the test case to run.
case_value = self.TEST_CASES[case]