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      1 # Copyright 2015 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 import time
      6 import utils
      7 
      8 from autotest_lib.client.common_lib import error
      9 from autotest_lib.client.cros.enterprise import enterprise_policy_base
     10 
     11 
     12 class policy_JavaScriptBlockedForUrls(
     13     enterprise_policy_base.EnterprisePolicyTest):
     14     """Test JavaScriptBlockedForUrls policy effect on CrOS look & feel.
     15 
     16     This test verifies the behavior of Chrome OS with a range of valid values
     17     for the JavaScriptBlockedForUrls user policy, covered by four named test
     18     cases: NotSet_Allow, SingleUrl_Block, MultipleUrls_Allow, and
     19     MultipleUrls_Block.
     20 
     21     When the policy value is None (as in test case=NotSet_Allow), then
     22     JavaScript execution be allowed on any page. When the policy value is set
     23     to a single URL pattern (as in test case=SingleUrl_Block), then
     24     JavaScript execution will be blocked on any page that matches that
     25     pattern. When set to multiple URL patterns (as case=MultipleUrls_Allow
     26     and MultipleUrls_Block) then JavaScript execution will be blocked on any
     27     page with an URL that matches any of the listed patterns.
     28 
     29     Two test cases (NotSet_Allow, MultipleUrls_Allow) are designed to allow
     30     JavaScript execution the test page. The other two test cases
     31     (NotSet_Allow, MultipleUrls_Block) are designed to block JavaScript
     32     execution on the test page.
     33 
     34     Note this test has a dependency on the DefaultJavaScriptSetting user
     35     policy, which is tested partially herein and in the test
     36     policy_JavaScriptAllowedForUrls. For this test, we set
     37     DefaultJavaScriptSetting=1. This allows JavaScript execution on all pages
     38     except those with a URL matching a pattern in JavaScriptBlockedForUrls.
     39     In the test policy_JavaScriptAllowedForUrls, we set
     40     DefaultJavaScriptSetting=2. That test blocks JavaScript execution on all
     41     pages except those with an URL matching a pattern in
     42     JavaScriptAllowedForUrls.
     43 
     44     """
     45     version = 1
     46 
     47     def initialize(self, **kwargs):
     48         self._initialize_test_constants()
     49         super(policy_JavaScriptBlockedForUrls, self).initialize(**kwargs)
     50         self.start_webserver()
     51 
     52 
     53     def _initialize_test_constants(self):
     54         """Initialize test-specific constants, some from class constants."""
     55         self.POLICY_NAME = 'JavaScriptBlockedForUrls'
     56         self.TEST_FILE = 'js_test.html'
     57         self.TEST_URL = '%s/%s' % (self.WEB_HOST, self.TEST_FILE)
     58         self.TEST_CASES = {
     59             'NotSet_Allow': None,
     60             'SingleUrl_Block': [self.WEB_HOST],
     61             'MultipleUrls_Allow': ['http://www.bing.com',
     62                                    'https://www.yahoo.com'],
     63             'MultipleUrls_Block': ['http://www.bing.com',
     64                                    self.TEST_URL,
     65                                    'https://www.yahoo.com']
     66         }
     67 
     68         self.STARTUP_URLS = ['chrome://policy', 'chrome://settings']
     69         self.SUPPORTING_POLICIES = {
     70             'DefaultJavaScriptSetting': 1,
     71             'BookmarkBarEnabled': False,
     72             'RestoreOnStartupURLs': self.STARTUP_URLS,
     73             'RestoreOnStartup': 4
     74         }
     75 
     76 
     77     def _can_execute_javascript(self, tab):
     78         """Determine whether JavaScript is allowed to run on the given page.
     79 
     80         @param tab: browser tab containing JavaScript to run.
     81 
     82         """
     83         try:
     84             utils.poll_for_condition(
     85                 lambda: tab.EvaluateJavaScript('jsAllowed', timeout=2),
     86                 exception=error.TestError('Test page is not ready.'))
     87             return True
     88         except:
     89             return False
     90 
     91 
     92     def _test_javascript_blocked_for_urls(self, policy_value):
     93         """Verify CrOS enforces the JavaScriptBlockedForUrls policy.
     94 
     95         When JavaScriptBlockedForUrls is undefined, JavaScript execution shall
     96         be allowed on all pages. When JavaScriptBlockedForUrls contains one or
     97         more URL patterns, JavaScript execution shall be blocked only on the
     98         pages whose URL matches any of the listed patterns.
     99 
    100         Note: This test does not use self.navigate_to_url(), because it can
    101         not depend on methods that evaluate or execute JavaScript.
    102 
    103         @param policy_value: policy value for this case.
    104 
    105         """
    106         tab = self.cr.browser.tabs.New()
    107         tab.Activate()
    108         tab.Navigate(self.TEST_URL)
    109         time.sleep(1)
    110 
    111         utils.poll_for_condition(
    112             lambda: tab.url == self.TEST_URL,
    113             exception=error.TestError('Test page is not ready.'))
    114         javascript_is_allowed = self._can_execute_javascript(tab)
    115 
    116         if policy_value is not None and (self.WEB_HOST in policy_value or
    117                                          self.TEST_URL in policy_value):
    118             # If |WEB_HOST| is in |policy_value|, then JavaScript execution
    119             # should be blocked. If execution is allowed, raise an error.
    120             if javascript_is_allowed:
    121                 raise error.TestFail('JavaScript should be blocked.')
    122         else:
    123             if not javascript_is_allowed:
    124                 raise error.TestFail('JavaScript should be allowed.')
    125         tab.Close()
    126 
    127 
    128     def run_test_case(self, case):
    129         """Setup and run the test configured for the specified test case.
    130 
    131         @param case: Name of the test case to run.
    132 
    133         """
    134         case_value = self.TEST_CASES[case]
    135         self.setup_case(self.POLICY_NAME, case_value, self.SUPPORTING_POLICIES)
    136         self._test_javascript_blocked_for_urls(case_value)
    137