add exporting of 'about' content as well as adding unit test checks

cms/djangoapps/contentstore/tests/test_contentstore.py

@@ -486,6 +486,9 @@ class ContentStoreToyCourseTest(ModuleStoreTestCase):
         # check for custom_tags
         self.verify_content_existence(module_store, root_dir, location, 'custom_tags', 'custom_tag_template')
 
+        # check for about content
+        self.verify_content_existence(module_store, root_dir, location, 'about', 'about', '.html')
+
         # check for graiding_policy.json
         filesystem = OSFS(root_dir / 'test_export/policies/6.002_Spring_2012')
         self.assertTrue(filesystem.exists('grading_policy.json'))

common/lib/xmodule/xmodule/modulestore/xml_exporter.py

@@ -28,6 +28,9 @@ def export_to_xml(modulestore, contentstore, course_location, root_dir, course_d
     # export the course updates
     export_extra_content(export_fs, modulestore, course_location, 'course_info', 'info', '.html')
 
+    # export the 'about' data (e.g. overview, etc.)
+    export_extra_content(export_fs, modulestore, course_location, 'about', 'about', '.html')
+
     # export the grading policy
     policies_dir = export_fs.makeopendir('policies')
     course_run_policy_dir = policies_dir.makeopendir(course.location.name)