EDUCATOR-526 Update view cert button to only appear after availability

date has passed

common/djangoapps/student/tests/tests.py

@@ -516,6 +516,7 @@ class DashboardTest(ModuleStoreTestCase):
             expiration_datetime=datetime.now(pytz.UTC) - timedelta(days=1)
         )
 
+        self.course.certificate_available_date = datetime.now(pytz.UTC) - timedelta(days=1)
         CourseEnrollment.enroll(self.user, self.course.id, mode='honor')
 
         self.course.start = datetime.now(pytz.UTC) - timedelta(days=2)

common/lib/xmodule/xmodule/course_metadata_utils.py

@@ -93,7 +93,12 @@ def course_start_date_is_default(start, advertised_start):
     return advertised_start is None and start == DEFAULT_START_DATE
 
 
-def may_certify_for_course(certificates_display_behavior, certificates_show_before_end, has_ended):
+def may_certify_for_course(
+        certificates_display_behavior,
+        certificates_show_before_end,
+        has_ended,
+        certificate_available_date
+):
     """
     Returns whether it is acceptable to show the student a certificate download
     link for a course.
@@ -105,12 +110,24 @@ def may_certify_for_course(certificates_display_behavior, certificates_show_befo
         certificates_show_before_end (bool): whether user can download the
             course's certificates before the course has ended.
         has_ended (bool): Whether the course has ended.
+        certificate_available_date (datetime): the date the certificate is available on for the course.
     """
     show_early = (
         certificates_display_behavior in ('early_with_info', 'early_no_info')
         or certificates_show_before_end
     )
-    return show_early or has_ended
+    past_availability_date = (
+        certificate_available_date
+        and certificate_available_date < datetime.now(utc)
+    )
+
+    if show_early:
+        return True
+    if past_availability_date:
+        return True
+    if (certificate_available_date is None) and has_ended:
+        return True
+    return False
 
 
 def sorting_score(start, advertised_start, announcement):

common/lib/xmodule/xmodule/course_module.py

@@ -1065,7 +1065,8 @@ class CourseDescriptor(CourseFields, SequenceDescriptor, LicenseMixin):
         return course_metadata_utils.may_certify_for_course(
             self.certificates_display_behavior,
             self.certificates_show_before_end,
-            self.has_ended()
+            self.has_ended(),
+            self.certificate_available_date
         )
 
     def has_started(self):

common/lib/xmodule/xmodule/tests/test_course_metadata_utils.py

@@ -161,11 +161,14 @@ class CourseMetadataUtilsTestCase(TestCase):
                 TestScenario((DEFAULT_START_DATE, None), True),
             ]),
             FunctionTest(may_certify_for_course, [
-                TestScenario(('early_with_info', True, True), True),
-                TestScenario(('early_no_info', False, False), True),
-                TestScenario(('end', True, False), True),
-                TestScenario(('end', False, True), True),
-                TestScenario(('end', False, False), False),
+                TestScenario(('early_with_info', True, True, test_datetime), True),
+                TestScenario(('early_no_info', False, False, test_datetime), True),
+                TestScenario(('end', True, False, test_datetime), True),
+                TestScenario(('end', False, True, test_datetime), True),
+                TestScenario(('end', False, False, _NEXT_WEEK), False),
+                TestScenario(('end', False, False, _LAST_WEEK), True),
+                TestScenario(('end', False, False, None), False),
+                TestScenario(('early_with_info', False, False, None), True),
             ]),
         ]