Fix or remove tearDown methods that don't use super.

Update edx-lint to the version that checks if tearDown uses super.

Convert a number of tearDown methods into addCleanup.

Remove some unneeded tearDown methods: no need to call patch.stopall if
none of them were started with patch.start.

cms/djangoapps/contentstore/management/commands/tests/test_export_all_courses.py

@@ -21,6 +21,7 @@ class ExportAllCourses(ModuleStoreTestCase):
         super(ExportAllCourses, self).setUp()
         self.store = modulestore()._get_modulestore_by_type(ModuleStoreEnum.Type.mongo)
         self.temp_dir = mkdtemp()
+        self.addCleanup(shutil.rmtree, self.temp_dir)
         self.first_course = CourseFactory.create(
             org="test", course="course1", display_name="run1", default_store=ModuleStoreEnum.Type.mongo
         )
@@ -47,7 +48,3 @@ class ExportAllCourses(ModuleStoreTestCase):
         self.assertEqual(len(courses), 2)
         self.assertEqual(len(failed_export_courses), 1)
         self.assertEqual(failed_export_courses[0], unicode(second_course_id))
-
-    def tearDown(self):
-        """ Common cleanup. """
-        shutil.rmtree(self.temp_dir)

cms/djangoapps/contentstore/management/commands/tests/test_export_convert_format.py

@@ -19,16 +19,13 @@ class ConvertExportFormat(TestCase):
         super(ConvertExportFormat, self).setUp()
 
         self.temp_dir = mkdtemp()
+        self.addCleanup(shutil.rmtree, self.temp_dir)
         self.data_dir = path(__file__).realpath().parent / 'data'
         self.version0 = self.data_dir / "Version0_drafts.tar.gz"
         self.version1 = self.data_dir / "Version1_drafts.tar.gz"
 
         self.command = Command()
 
-    def tearDown(self):
-        """ Common cleanup. """
-        shutil.rmtree(self.temp_dir)
-
     def test_no_args(self):
         """ Test error condition of no arguments. """
         errstring = "export requires two arguments"

cms/djangoapps/contentstore/tests/test_transcripts_utils.py

@@ -112,8 +112,9 @@ class TestSaveSubsToStore(ModuleStoreTestCase):
         self.subs_id = str(uuid4())
         filename = 'subs_{0}.srt.sjson'.format(self.subs_id)
         self.content_location = StaticContent.compute_location(self.course.id, filename)
+        self.addCleanup(self.clear_subs_content)
 
-        # incorrect  subs
+        # incorrect subs
         self.unjsonable_subs = set([1])  # set can't be serialized
 
         self.unjsonable_subs_id = str(uuid4())
@@ -150,9 +151,6 @@ class TestSaveSubsToStore(ModuleStoreTestCase):
         with self.assertRaises(NotFoundError):
             contentstore().find(self.content_location_unjsonable)
 
-    def tearDown(self):
-        self.clear_subs_content()
-
 
 @override_settings(CONTENTSTORE=TEST_DATA_CONTENTSTORE)
 class TestDownloadYoutubeSubs(ModuleStoreTestCase):

cms/djangoapps/contentstore/views/tests/test_course_index.py

@@ -383,6 +383,8 @@ class TestCourseReIndex(CourseTestCase):
         with open(self.TEST_INDEX_FILENAME, "w+") as index_file:
             json.dump({}, index_file)
 
+        self.addCleanup(os.remove, self.TEST_INDEX_FILENAME)
+
     def test_reindex_course(self):
         """
         Verify that course gets reindexed.
@@ -666,6 +668,3 @@ class TestCourseReIndex(CourseTestCase):
         # Start manual reindex and check error in response
         with self.assertRaises(SearchIndexingError):
             CoursewareSearchIndexer.do_course_reindex(modulestore(), self.course.id)
-
-    def tearDown(self):
-        os.remove(self.TEST_INDEX_FILENAME)

cms/djangoapps/contentstore/views/tests/test_import_export.py

@@ -43,6 +43,7 @@ class ImportTestCase(CourseTestCase):
         super(ImportTestCase, self).setUp()
         self.url = reverse_course_url('import_handler', self.course.id)
         self.content_dir = path(tempfile.mkdtemp())
+        self.addCleanup(shutil.rmtree, self.content_dir)
 
         def touch(name):
             """ Equivalent to shell's 'touch'"""
@@ -74,9 +75,6 @@ class ImportTestCase(CourseTestCase):
 
         self.unsafe_common_dir = path(tempfile.mkdtemp(dir=self.content_dir))
 
-    def tearDown(self):
-        shutil.rmtree(self.content_dir)
-
     def test_no_coursexml(self):
         """
         Check that the response for a tar.gz import without a course.xml is

common/lib/xmodule/xmodule/tests/test_export.py

@@ -227,6 +227,7 @@ class ConvertExportFormat(unittest.TestCase):
 
         # Directory for expanding all the test archives
         self.temp_dir = mkdtemp()
+        self.addCleanup(shutil.rmtree, self.temp_dir)
 
         # Directory where new archive will be created
         self.result_dir = path(self.temp_dir) / uuid.uuid4().hex
@@ -284,10 +285,6 @@ class ConvertExportFormat(unittest.TestCase):
             self._no_version = self._expand_archive('NoVersionNumber.tar.gz')
         return self._no_version
 
-    def tearDown(self):
-        """ Common cleanup. """
-        shutil.rmtree(self.temp_dir)
-
     def _expand_archive(self, name):
         """ Expand archive into a directory and return the directory. """
         target = path(self.temp_dir) / uuid.uuid4().hex

common/lib/xmodule/xmodule/tests/test_video.py

@@ -642,6 +642,7 @@ class VideoDescriptorIndexingTestCase(unittest.TestCase):
         """
         Overrides YOUTUBE and CONTENTSTORE settings
         """
+        super(VideoDescriptorIndexingTestCase, self).setUp()
         self.youtube_setting = getattr(settings, "YOUTUBE", None)
         self.contentstore_setting = getattr(settings, "CONTENTSTORE", None)
         settings.YOUTUBE = {

lms/djangoapps/branding/tests/test_models.py

@@ -11,6 +11,7 @@ class BrandingInfoConfigTest(TestCase):
     Test the BrandingInfoConfig model.
     """
     def setUp(self):
+        super(BrandingInfoConfigTest, self).setUp()
         self.configuration_string = """{
             "CN": {
                     "url": "http://www.xuetangx.com",

lms/djangoapps/bulk_email/tests/test_course_optout.py

@@ -18,7 +18,6 @@ from xmodule.modulestore.tests.factories import CourseFactory
 
 @patch('bulk_email.models.html_to_text', Mock(return_value='Mocking CourseEmail.text_message'))
 class TestOptoutCourseEmails(ModuleStoreTestCase):
-
     """
     Test that optouts are referenced in sending course email.
     """
@@ -42,12 +41,6 @@ class TestOptoutCourseEmails(ModuleStoreTestCase):
             'success': True,
         }
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     def navigate_to_email_view(self):
         """Navigate to the instructor dash's email view"""
         # Pull up email view on instructor dashboard

lms/djangoapps/bulk_email/tests/test_email.py

@@ -84,12 +84,6 @@ class EmailSendFromDashboardTestCase(ModuleStoreTestCase):
             'success': True,
         }
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
 
 @patch.dict(settings.FEATURES, {'ENABLE_INSTRUCTOR_EMAIL': True, 'REQUIRE_COURSE_EMAIL_AUTH': False})
 @patch('bulk_email.models.html_to_text', Mock(return_value='Mocking CourseEmail.text_message'))

lms/djangoapps/bulk_email/tests/test_err_handling.py

@@ -58,9 +58,6 @@ class TestEmailErrors(ModuleStoreTestCase):
             'success': True,
         }
 
-    def tearDown(self):
-        patch.stopall()
-
     @patch('bulk_email.tasks.get_connection', autospec=True)
     @patch('bulk_email.tasks.send_course_email.retry')
     def test_data_err_retry(self, retry, get_conn):

lms/djangoapps/bulk_email/tests/test_forms.py

@@ -23,12 +23,6 @@ class CourseAuthorizationFormTest(ModuleStoreTestCase):
         course_title = u"ẗëṡẗ title ｲ乇丂ｲ ﾶ乇丂丂ﾑg乇 ｷo尺 ﾑﾚﾚ тэѕт мэѕѕаБэ"
         self.course = CourseFactory.create(display_name=course_title)
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     @patch.dict(settings.FEATURES, {'ENABLE_INSTRUCTOR_EMAIL': True, 'REQUIRE_COURSE_EMAIL_AUTH': True})
     def test_authorize_mongo_course(self):
         # Initially course shouldn't be authorized

lms/djangoapps/courseware/tests/test_group_access.py

@@ -176,6 +176,7 @@ class GroupAccessTestCase(ModuleStoreTestCase):
         side-effects in other tests.
         """
         UserPartition.scheme_extensions = None
+        super(GroupAccessTestCase, self).tearDown()
 
     def check_access(self, user, block_location, is_accessible):
         """

lms/djangoapps/courseware/tests/test_video_handlers.py

@@ -154,6 +154,7 @@ class TestVideo(BaseTestXmodule):
 
     def tearDown(self):
         _clear_assets(self.item_descriptor.location)
+        super(TestVideo, self).tearDown()
 
 
 class TestTranscriptAvailableTranslationsDispatch(TestVideo):

lms/djangoapps/dashboard/tests/test_support.py

@@ -45,6 +45,7 @@ class RefundTests(ModuleStoreTestCase):
     def tearDown(self):
         self.course_mode.delete()
         Order.objects.filter(user=self.student).delete()
+        super(RefundTests, self).tearDown()
 
     def _enroll(self, purchase=True):
         # pylint: disable=missing-docstring

lms/djangoapps/django_comment_client/tests.py

@@ -31,15 +31,12 @@ class PermissionsTestCase(TestCase):
         self.moderator.is_staff = True
         self.moderator.save()
         self.student_enrollment = CourseEnrollment.enroll(self.student, self.course_id)
+        self.addCleanup(self.student_enrollment.delete)
         self.moderator_enrollment = CourseEnrollment.enroll(self.moderator, self.course_id)
-
-    def tearDown(self):
-        self.student_enrollment.delete()
-        self.moderator_enrollment.delete()
-
-# Do we need to have this? We shouldn't be deleting students, ever
-#        self.student.delete()
-#        self.moderator.delete()
+        self.addCleanup(self.moderator_enrollment.delete)
+        # Do we need to have this in a cleanup? We shouldn't be deleting students, ever.
+        #   self.student.delete()
+        #   self.moderator.delete()
 
     def testDefaultRoles(self):
         self.assertTrue(self.student_role in self.student.roles.all())

lms/djangoapps/django_comment_client/tests/mock_cs_server/test_mock_cs_server.py

@@ -29,16 +29,13 @@ class MockCommentServiceServerTest(unittest.TestCase):
         self.expected_response = {'username': 'user100', 'external_id': '4'}
         self.server = MockCommentServiceServer(port_num=server_port,
                                                response=self.expected_response)
+        self.addCleanup(self.server.shutdown)
 
         # Start the server in a separate daemon thread
         server_thread = threading.Thread(target=self.server.serve_forever)
         server_thread.daemon = True
         server_thread.start()
 
-    def tearDown(self):
-        # Stop the server, freeing up the port
-        self.server.shutdown()
-
     def test_new_user_request(self):
         """
         Test the mock comment service using an example

lms/djangoapps/instructor/tests/test_api.py

@@ -602,12 +602,6 @@ class TestInstructorAPIEnrollment(ModuleStoreTestCase, LoginEnrollmentTestCase):
         # (comment because pylint C0103(invalid-name))
         # self.maxDiff = None
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     def test_missing_params(self):
         """ Test missing all query parameters. """
         url = reverse('students_update_enrollment', kwargs={'course_id': self.course.id.to_deprecated_string()})
@@ -2725,12 +2719,6 @@ class TestInstructorAPITaskLists(ModuleStoreTestCase, LoginEnrollmentTestCase):
         self.tasks = [self.FakeTask(mock_factory.mock_get_task_completion_info) for _ in xrange(7)]
         self.tasks[-1].make_invalid_output()
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     @patch.object(instructor_task.api, 'get_running_instructor_tasks')
     def test_list_instructor_tasks_running(self, act):
         """ Test list of all running tasks. """
@@ -2830,12 +2818,6 @@ class TestInstructorEmailContentList(ModuleStoreTestCase, LoginEnrollmentTestCas
         self.emails = {}
         self.emails_info = {}
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     def setup_fake_email_info(self, num_emails, with_failures=False):
         """ Initialize the specified number of fake emails """
         for email_id in range(num_emails):
@@ -3783,10 +3765,7 @@ class TestBulkCohorting(ModuleStoreTestCase):
         self.staff_user = StaffFactory(course_key=self.course.id)
         self.non_staff_user = UserFactory.create()
         self.tempdir = tempfile.mkdtemp()
-
-    def tearDown(self):
-        if os.path.exists(self.tempdir):
-            shutil.rmtree(self.tempdir)
+        self.addCleanup(shutil.rmtree, self.tempdir)
 
     def call_add_users_to_cohorts(self, csv_data, suffix='.csv', method='POST'):
         """

lms/djangoapps/instructor/tests/test_ecommerce.py

@@ -4,7 +4,6 @@ Unit tests for Ecommerce feature flag in new instructor dashboard.
 
 import datetime
 
-from mock import patch
 import pytz
 
 from django.core.urlresolvers import reverse
@@ -38,12 +37,6 @@ class TestECommerceDashboardViews(ModuleStoreTestCase):
         self.e_commerce_link = '<a href="" data-section="e-commerce">E-Commerce</a>'
         CourseFinanceAdminRole(self.course.id).add_users(self.instructor)
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     def test_pass_e_commerce_tab_in_instructor_dashboard(self):
         """
         Test Pass E-commerce Tab is in the Instructor Dashboard

lms/djangoapps/instructor/tests/test_email.py

@@ -33,12 +33,6 @@ class TestNewInstructorDashboardEmailViewMongoBacked(ModuleStoreTestCase):
         # URL for email view
         self.email_link = '<a href="" data-section="send_email">Email</a>'
 
-    def tearDown(self):
-        """
-        Undo all patches.
-        """
-        patch.stopall()
-
     # In order for bulk email to work, we must have both the ENABLE_INSTRUCTOR_EMAIL_FLAG
     # set to True and for the course to be Mongo-backed.
     # The flag is enabled and the course is Mongo-backed (should work)

lms/djangoapps/shoppingcart/tests/test_models.py

@@ -926,6 +926,7 @@ class InvoiceHistoryTest(TestCase):
     }
 
     def setUp(self):
+        super(InvoiceHistoryTest, self).setUp()
         invoice_data = copy.copy(self.INVOICE_INFO)
         invoice_data.update(self.CONTACT_INFO)
         self.invoice = Invoice.objects.create(total_amount="123.45", **invoice_data)

requirements/edx/github.txt

@@ -39,7 +39,7 @@ git+https://github.com/mitocw/django-cas.git@60a5b8e5a62e63e0d5d224a87f0b489201a
 -e git+https://github.com/pmitros/RecommenderXBlock.git@9b07e807c89ba5761827d0387177f71aa57ef056#egg=recommender-xblock
 -e git+https://github.com/edx/edx-milestones.git@547f2250ee49e73ce8d7ff4e78ecf1b049892510#egg=edx-milestones
 -e git+https://github.com/edx/edx-search.git@264bb3317f98e9cb22b932aa11b89d0651fd741c#egg=edx-search
-git+https://github.com/edx/edx-lint.git@c592557ecee8f2f1ef14ad984e1353f41aba0b47#egg=edx_lint==0.2
+git+https://github.com/edx/edx-lint.git@8bf82a32ecb8598c415413df66f5232ab8d974e9#egg=edx_lint==0.2.1
 -e git+https://github.com/edx/xblock-utils.git@17e247d66fabb53f0453515b093a030ee345a1b0#egg=xblock-utils
 -e git+https://github.com/edx-solutions/xblock-google-drive.git@138e6fa0bf3a2013e904a085b9fed77dab7f3f21#egg=xblock-google-drive