Add tests for enrollment deactivation under various modes.

A bug with the creation of inactive honor enrollment modes was caught and fixed along the way.

XCOM-388

common/djangoapps/enrollment/tests/test_views.py

@@ -526,24 +526,34 @@ class EnrollmentTest(EnrollmentTestMixin, ModuleStoreTestCase, APITestCase):
         self.assertTrue(is_active)
         self.assertEqual(course_mode, CourseMode.HONOR)
 
-    def test_deactivate_enrollment(self):
+    @ddt.data(
+        ((CourseMode.HONOR, ), CourseMode.HONOR),
+        ((CourseMode.HONOR, CourseMode.VERIFIED), CourseMode.HONOR),
+        ((CourseMode.HONOR, CourseMode.VERIFIED), CourseMode.VERIFIED),
+        ((CourseMode.PROFESSIONAL, ), CourseMode.PROFESSIONAL),
+        ((CourseMode.NO_ID_PROFESSIONAL_MODE, ), CourseMode.NO_ID_PROFESSIONAL_MODE),
+        ((CourseMode.VERIFIED, CourseMode.CREDIT_MODE), CourseMode.VERIFIED),
+        ((CourseMode.VERIFIED, CourseMode.CREDIT_MODE), CourseMode.CREDIT_MODE),
+    )
+    @ddt.unpack
+    def test_deactivate_enrollment(self, configured_modes, selected_mode):
         """With the right API key, deactivate (i.e., unenroll from) an existing enrollment."""
-        # Create an honor and verified mode for a course. This allows an update.
-        for mode in [CourseMode.HONOR, CourseMode.VERIFIED]:
+        # Configure a set of modes for the course.
+        for mode in configured_modes:
             CourseModeFactory.create(
                 course_id=self.course.id,
                 mode_slug=mode,
                 mode_display_name=mode,
             )
 
-        # Create a 'verified' enrollment
-        self.assert_enrollment_status(as_server=True, mode=CourseMode.VERIFIED)
+        # Create an enrollment with the selected mode.
+        self.assert_enrollment_status(as_server=True, mode=selected_mode)
 
-        # Check that the enrollment is 'verified' and active.
+        # Check that the enrollment has the correct mode and is active.
         self.assertTrue(CourseEnrollment.is_enrolled(self.user, self.course.id))
         course_mode, is_active = CourseEnrollment.enrollment_mode_for_user(self.user, self.course.id)
         self.assertTrue(is_active)
-        self.assertEqual(course_mode, CourseMode.VERIFIED)
+        self.assertEqual(course_mode, selected_mode)
 
         # Verify that a non-Boolean enrollment status is treated as invalid.
         self.assert_enrollment_status(
@@ -554,10 +564,19 @@ class EnrollmentTest(EnrollmentTestMixin, ModuleStoreTestCase, APITestCase):
         )
 
         # Verify that the enrollment has been deactivated, and that the mode is unchanged.
-        self.assert_enrollment_activation(False)
+        self.assert_enrollment_activation(False, selected_mode)
 
         # Verify that enrollment deactivation is idempotent.
-        self.assert_enrollment_activation(False)
+        self.assert_enrollment_activation(False, selected_mode)
+
+        # Verify that omitting the mode returns 400 for course configurations
+        # in which the default (honor) mode doesn't exist.
+        expected_status = status.HTTP_200_OK if CourseMode.HONOR in configured_modes else status.HTTP_400_BAD_REQUEST
+        self.assert_enrollment_status(
+            as_server=True,
+            is_active=False,
+            expected_status=expected_status,
+        )
 
     def test_change_mode_from_user(self):
         """Users should not be able to alter the enrollment mode on an enrollment. """

common/djangoapps/enrollment/views.py

@@ -425,7 +425,7 @@ class EnrollmentListView(APIView, ApiKeyPermissionMixIn):
                 response = api.update_enrollment(username, unicode(course_id), mode=mode, is_active=is_active)
             else:
                 # Will reactivate inactive enrollments.
-                response = api.add_enrollment(username, unicode(course_id), mode=mode)
+                response = api.add_enrollment(username, unicode(course_id), mode=mode, is_active=is_active)
 
             email_opt_in = request.DATA.get('email_opt_in', None)
             if email_opt_in is not None: