Conditional import of adblocker.

tools/android/loading/content_classification_lens_unittest.py

 # Copyright 2016 The Chromium 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 copy
 import unittest
 
 from content_classification_lens import (ContentClassificationLens,
                                          _RulesMatcher)
 from request_track import (Request, TimingFromDict)
 import test_utils
 
 
 class ContentClassificationLensTestCase(unittest.TestCase):
   _REQUEST = Request.FromJsonDict({'url': 'http://bla.com',
                                    'request_id': '1234.1',
                                    'frame_id': '123.1',
                                    'initiator': {'type': 'other'},
                                    'timestamp': 2,
                                    'timing': TimingFromDict({})})
   _MAIN_FRAME_ID = '123.1'
   _PAGE_EVENTS = [{'method': 'Page.frameStartedLoading',
                    'frame_id': _MAIN_FRAME_ID},
                   {'method': 'Page.frameAttached',
                    'frame_id': '123.13', 'parent_frame_id': _MAIN_FRAME_ID}]
   _RULES = ['bla.com']
 
+  def testNoRules(self):
+    trace = test_utils.LoadingTraceFromEvents(
+        [self._REQUEST], self._PAGE_EVENTS)
+    lens = ContentClassificationLens(trace, [], [])
+    self.assertFalse(lens.IsAdRequest(self._REQUEST))
+    self.assertFalse(lens.IsTrackingRequest(self._REQUEST))
+
   def testAdRequest(self):
     trace = test_utils.LoadingTraceFromEvents(
         [self._REQUEST], self._PAGE_EVENTS)
     lens = ContentClassificationLens(trace, self._RULES, [])
     self.assertTrue(lens.IsAdRequest(self._REQUEST))
     self.assertFalse(lens.IsTrackingRequest(self._REQUEST))
 
   def testTrackingRequest(self):
     trace = test_utils.LoadingTraceFromEvents(
         [self._REQUEST], self._PAGE_EVENTS)
@@ skipping 38 matching lines @@
   def testScriptRule(self):
     matcher = _RulesMatcher([self._SCRIPT_RULE], False)
     request = copy.deepcopy(self._SCRIPT_REQUEST)
     request.resource_type = 'Stylesheet'
     self.assertFalse(matcher.Matches(request))
     self.assertTrue(matcher.Matches(self._SCRIPT_REQUEST))
 
 
 if __name__ == '__main__':
   unittest.main()