test: count num of mysql queries

Author: BryanttV

cms/djangoapps/contentstore/tests/test_course_listing.py

@@ -317,6 +317,10 @@ def test_course_listing_org_permissions(self, role):
         self.assertEqual(len(list(courses_list)), 2)
         self.assertTrue(all(isinstance(course, CourseOverview) for course in courses_list))
 
+        # Now count the db queries for staff
+        with self.assertNumQueries(2):
+            list(_accessible_courses_summary_iter(self.request))
+
     @ddt.data(OrgStaffRole(), OrgInstructorRole())
     def test_course_listing_org_permissions_exception(self, role):
         """