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