test: add dupe testing

edx_exams/apps/core/management/commands/test/test_bulk_add_course_staff.py

@@ -5,7 +5,7 @@
 from django.test import TestCase
 
 from edx_exams.apps.core.models import CourseStaffRole, User
-from edx_exams.apps.core.test_utils.factories import UserFactory
+from edx_exams.apps.core.test_utils.factories import CourseStaffRoleFactory, UserFactory
 
 
 class TestBulkAddCourseStaff(TestCase):
@@ -130,3 +130,32 @@ def test_dupe_user_csv(self):
             call_command(self.command, f'--csv_path={csv.name}')
             self._assert_user_and_role(username, email, self.course_role, self.course_id)
             self._assert_user_and_role(username, email, self.course_role, course_id_2)
+
+    def test_existing_course_staff_csv(self):
+        """ Assert that the course staff role are correctly created given already existing course staff roles in csv """
+        course_existing = 'course-v1:edx+test+f24'
+        CourseStaffRoleFactory.create(
+            user=self.user,
+            course_id=course_existing,
+            role=self.course_role,
+        )
+        lines = [f'{self.user.username},{self.user.email},{self.course_role},{course_existing}\n']
+        with NamedTemporaryFile() as csv:
+            csv = self._write_test_csv(csv, lines)
+            call_command(self.command, f'--csv_path={csv.name}')
+            self._assert_user_and_role(self.user.username, self.user.email, self.course_role, course_existing)
+
+    def test_dupe_course_staff_csv(self):
+        """ Assert that the course staff role are correctly created given dupe course staff roles in csv """
+        course_existing = 'course-v1:edx+test+f24'
+        CourseStaffRoleFactory.create(
+            user=self.user,
+            course_id=course_existing,
+            role=self.course_role,
+        )
+        lines = [f'{self.user.username},{self.user.email},{self.course_role},{course_existing}\n',
+                 f'{self.user.username},{self.user.email},{self.course_role},{course_existing}\n']
+        with NamedTemporaryFile() as csv:
+            csv = self._write_test_csv(csv, lines)
+            call_command(self.command, f'--csv_path={csv.name}')
+            self._assert_user_and_role(self.user.username, self.user.email, self.course_role, course_existing)