[tor-bugs] #30341 [Applications/Quality Assurance and Testing]: tbb-testsuite: fix the screenshots test

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#30341: tbb-testsuite: fix the screenshots test
-------------------------------------+-------------------------------------
     Reporter:  boklm                |      Owner:  cypherpunks
         Type:  defect               |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:                       |    Version:
  Applications/Quality Assurance     |
  and Testing                        |   Keywords:  tbb-testsuite,
     Severity:  Normal               |  boklm201904, TorBrowserTeam201904
Actual Points:                       |  Parent ID:  #27105
       Points:                       |   Reviewer:
      Sponsor:                       |
-------------------------------------+-------------------------------------
 The screenshots test is currently failing with the error:
 {{{
 Traceback (most recent call last):
 File "/home/tbb-testsuite/tbb-testsuite/virtualenv-
 marionette-4.3.0/local/lib/python2.7/site-
 packages/marionette_harness-4.3.0-py2.7.egg/marionette_harness/marionette_test/testcases.py",
 line 156, in run
 testMethod()
 File "/home/tbb-testsuite/tbb-
 testsuite/marionette/tor_browser_tests/test_screenshots.py", line 27, in
 test_check_tpo
 marionette.navigate(url)
 File "/home/tbb-testsuite/tbb-testsuite/virtualenv-
 marionette-4.3.0/local/lib/python2.7/site-
 packages/marionette_driver-2.5.0-py2.7.egg/marionette_driver/marionette.py",
 line 1632, in navigate
 self._send_message("get", {"url": url})
 File "/home/tbb-testsuite/tbb-testsuite/virtualenv-
 marionette-4.3.0/local/lib/python2.7/site-
 packages/marionette_driver-2.5.0-py2.7.egg/marionette_driver/decorators.py",
 line 23, in _
 return func(*args, **kwargs)
 File "/home/tbb-testsuite/tbb-testsuite/virtualenv-
 marionette-4.3.0/local/lib/python2.7/site-
 packages/marionette_driver-2.5.0-py2.7.egg/marionette_driver/marionette.py",
 line 740, in _send_message
     self._handle_error(err)
   File "/home/tbb-testsuite/tbb-testsuite/virtualenv-
 marionette-4.3.0/local/lib/python2.7/site-
 packages/marionette_driver-2.5.0-py2.7.egg/marionette_driver/marionette.py",
 line 764, in _handle_error
     raise errors.lookup(error)(message, stacktrace=stacktrace)
 UnknownException: Reached error page:
 about:neterror?e=fileNotFound&u=chrome%3A//torbutton/content/preferences.xul&c=UTF-8&f=regular&d=Die%20Dateien%20unter%20chrome%3A//torbutton/content/preferences.xul%20konnten%20nicht%20gefunden%20werden.
 stacktrace:
         WebDriverError at chrome://marionette/content/error.js:178:5
         UnknownError at chrome://marionette/content/error.js:529:5
 handleReadyState at chrome://marionette/content/listener.js:277:21
 handleEvent at chrome://marionette/content/listener.js:245:9
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30341>
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