fix: do not use course's due date when a timed exam has one specified

24199b4 introduced course end date check to allow viewing timed exams after
course end date in self-paced courses. However, this change also means that
the students cannot submit exams once the course due date is in the past.
The exam's due date should have a higher priority, so that the students with
an individual due date extension (set through the Instructor Dashboard) can
still complete an exam in such a case.

CHANGELOG.rst

@@ -14,6 +14,10 @@ Change Log
 Unreleased
 ~~~~~~~~~~
 
+[4.13.0] - 2022-10-26
+~~~~~~~~~~~~~~~~~~~~~
+* Do not use course's due date when a timed exam has one specified
+
 [4.12.2] - 2022-10-19
 ~~~~~~~~~~~~~~~~~~~~~
 * Return external id when requesting exam attempt

edx_proctoring/__init__.py

@@ -3,6 +3,6 @@
 """
 
 # Be sure to update the version number in edx_proctoring/package.json
-__version__ = '4.12.2'
+__version__ = '4.13.0'
 
 default_app_config = 'edx_proctoring.apps.EdxProctoringConfig'  # pylint: disable=invalid-name

edx_proctoring/api.py

@@ -882,11 +882,16 @@ def is_exam_passed_due(exam, user=None):
     Return whether the due date has passed.
     Uses edx_when to lookup the date for the subsection.
     """
+    due_date = get_exam_due_date(exam, user=user)
     return (
-        has_due_date_passed(get_exam_due_date(exam, user=user))
-        # if the exam is timed and passed the course end date, it should also be considered passed due
+        has_due_date_passed(due_date)
+        # If the exam is timed and passed the course end date, it should also be considered passed due, unless
+        # it has a due date set. The exam's due date has a higher priority than the course's end date.
         or (
-            not exam['is_proctored'] and not exam['is_practice_exam'] and has_end_date_passed(exam['course_id'])
+            not due_date
+            and not exam['is_proctored']
+            and not exam['is_practice_exam']
+            and has_end_date_passed(exam['course_id'])
         )
     )
 

edx_proctoring/tests/test_student_view.py

@@ -873,6 +873,33 @@ def test_timed_exam_attempt_with_past_due_datetime(self):
             )
             self.assertIn(self.exam_expired_msg, rendered_response)
 
+    @patch('edx_when.api.get_date_for_block')
+    @patch('edx_when.api.get_dates_for_course')
+    def test_timed_exam_attempt_with_past_course_due_date_and_future_exam_due_date(
+        self, mock_course_dates, mock_exam_due_date
+    ):
+        """
+        When the course due date is in the past, but the exam-specific due date is in the future, students should still
+        be able to start this exam.
+        """
+        current_date = datetime.now(pytz.UTC)
+        course_end_date = current_date - timedelta(days=14)
+        exam_due_date = current_date + timedelta(days=14)
+
+        mock_course_dates.return_value = {('dummy', 'end'): course_end_date}
+        mock_exam_due_date.return_value = exam_due_date
+
+        self._create_exam_with_due_time(due_date=exam_due_date, is_proctored=False)
+
+        with freeze_time(current_date):
+            rendered_response = get_student_view(
+                user_id=self.user_id,
+                course_id=self.course_id,
+                content_id=self.content_id_for_exam_with_due_date,
+                context={},
+            )
+            self.assertIn(self.timed_footer_msg, rendered_response)
+
     @patch.dict('django.conf.settings.PROCTORING_SETTINGS', {'ALLOW_TIMED_OUT_STATE': True})
     def test_get_studentview_timedout(self):
         """

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@edx/edx-proctoring",
   "//": "Note that the version format is slightly different than that of the Python version when using prereleases.",
-  "version": "4.12.2",
+  "version": "4.13.0",
   "main": "edx_proctoring/static/index.js",
   "scripts": {
     "test": "gulp test"