old_contents: """
  Test for export all courses.
  """
  import shutil
  from tempfile import mkdtemp
  
  from contentstore.management.commands.export_all_courses import export_courses_to_output_path
  
  from xmodule.modulestore import ModuleStoreEnum
  from xmodule.modulestore.django import modulestore
  from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
  from xmodule.modulestore.tests.factories import CourseFactory
  
  
  class ExportAllCourses(ModuleStoreTestCase):
      """
      Tests exporting all courses.
      """
      def setUp(self):
          """ Common setup. """
          super(ExportAllCourses, self).setUp()
          self.store = modulestore()._get_modulestore_by_type(ModuleStoreEnum.Type.mongo)
          self.temp_dir = mkdtemp()
          self.first_course = CourseFactory.create(org="test", course="course1", display_name="run1")
          self.second_course = CourseFactory.create(org="test", course="course2", display_name="run2")
  
      def test_export_all_courses(self):
          """
          Test exporting good and faulty courses
          """
          # check that both courses exported successfully
          courses, failed_export_courses = export_courses_to_output_path(self.temp_dir)
          self.assertEqual(len(courses), 2)
          self.assertEqual(len(failed_export_courses), 0)
  
          # manually make second course faulty and check that it fails on export
          second_course_id = self.second_course.id
          self.store.collection.update(
              {'_id.org': second_course_id.org, '_id.course': second_course_id.course, '_id.name': second_course_id.run},
              {'$set': {'metadata.tags': 'crash'}}
          )
          courses, failed_export_courses = export_courses_to_output_path(self.temp_dir)
          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)
  
new_contents: """
  Test for export all courses.
  """
  import shutil
  from tempfile import mkdtemp
  
  from contentstore.management.commands.export_all_courses import export_courses_to_output_path
  
  from xmodule.modulestore import ModuleStoreEnum
  from xmodule.modulestore.django import modulestore
  from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
  from xmodule.modulestore.tests.factories import CourseFactory
  
  
  class ExportAllCourses(ModuleStoreTestCase):
      """
      Tests exporting all courses.
      """
      def setUp(self):
          """ Common setup. """
          super(ExportAllCourses, self).setUp()
          self.store = modulestore()._get_modulestore_by_type(ModuleStoreEnum.Type.mongo)
          self.temp_dir = mkdtemp()
          self.first_course = CourseFactory.create(
              org="test", course="course1", display_name="run1", default_store=ModuleStoreEnum.Type.mongo
          )
          self.second_course = CourseFactory.create(
              org="test", course="course2", display_name="run2", default_store=ModuleStoreEnum.Type.mongo
          )
  
      def test_export_all_courses(self):
          """
          Test exporting good and faulty courses
          """
          # check that both courses exported successfully
          courses, failed_export_courses = export_courses_to_output_path(self.temp_dir)
          self.assertEqual(len(courses), 2)
          self.assertEqual(len(failed_export_courses), 0)
  
          # manually make second course faulty and check that it fails on export
          second_course_id = self.second_course.id
          self.store.collection.update(
              {'_id.org': second_course_id.org, '_id.course': second_course_id.course, '_id.name': second_course_id.run},
              {'$set': {'metadata.tags': 'crash'}}
          )
          courses, failed_export_courses = export_courses_to_output_path(self.temp_dir)
          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)
  
subject: Use old mongo store to create courses.