Create a 3rd explicit shard for unit tests.

More accurately, this creates a 4th shard because the
last shard is always the default.

lms/djangoapps/instructor_task/tests/test_api.py

@@ -2,6 +2,7 @@
 Test for LMS instructor background task queue management
 """
 from mock import patch, Mock, MagicMock
+from nose.plugins.attrib import attr
 from bulk_email.models import CourseEmail, SEND_TO_ALL
 from courseware.tests.factories import UserFactory
 from xmodule.modulestore.exceptions import ItemNotFoundError
@@ -82,6 +83,7 @@ class InstructorTaskReportTest(InstructorTaskTestCase):
         self.assertEquals(set(task_ids), set())
 
 
+@attr('shard_3')
 class InstructorTaskModuleSubmitTest(InstructorTaskModuleTestCase):
     """Tests API methods that involve the submission of module-based background tasks."""
 
@@ -172,6 +174,7 @@ class InstructorTaskModuleSubmitTest(InstructorTaskModuleTestCase):
         self._test_submit_task(submit_delete_problem_state_for_all_students)
 
 
+@attr('shard_3')
 @patch('bulk_email.models.html_to_text', Mock(return_value='Mocking CourseEmail.text_message', autospec=True))
 class InstructorTaskCourseSubmitTest(TestReportMixin, InstructorTaskCourseTestCase):
     """Tests API methods that involve the submission of course-based background tasks."""

lms/djangoapps/instructor_task/tests/test_integration.py

@@ -8,6 +8,7 @@ paths actually work.
 import json
 import logging
 from mock import patch
+from nose.plugins.attrib import attr
 import textwrap
 
 from celery.states import SUCCESS, FAILURE
@@ -63,6 +64,7 @@ class TestIntegrationTask(InstructorTaskModuleTestCase):
         self.assertEqual(status['message'], expected_message)
 
 
+@attr('shard_3')
 class TestRescoringTask(TestIntegrationTask):
     """
     Integration-style tests for rescoring problems in a background task.

lms/djangoapps/instructor_task/tests/test_tasks.py

@@ -9,6 +9,7 @@ import json
 from uuid import uuid4
 
 from mock import Mock, MagicMock, patch
+from nose.plugins.attrib import attr
 
 from celery.states import SUCCESS, FAILURE
 from django.utils.translation import ugettext_noop
@@ -213,6 +214,7 @@ class TestInstructorTasks(InstructorTaskModuleTestCase):
         self.assertEquals(output['traceback'][-3:], "...")
 
 
+@attr('shard_3')
 class TestRescoreInstructorTask(TestInstructorTasks):
     """Tests problem-rescoring instructor task."""
 
@@ -315,6 +317,7 @@ class TestRescoreInstructorTask(TestInstructorTasks):
         self.assertGreater(output.get('duration_ms'), 0)
 
 
+@attr('shard_3')
 class TestResetAttemptsInstructorTask(TestInstructorTasks):
     """Tests instructor task that resets problem attempts."""
 
@@ -413,6 +416,7 @@ class TestResetAttemptsInstructorTask(TestInstructorTasks):
         self._test_reset_with_student(True)
 
 
+@attr('shard_3')
 class TestDeleteStateInstructorTask(TestInstructorTasks):
     """Tests instructor task that deletes problem state."""
 

lms/djangoapps/instructor_task/tests/test_tasks_helper.py

@@ -16,6 +16,7 @@ import urllib
 import ddt
 from freezegun import freeze_time
 from mock import Mock, patch
+from nose.plugins.attrib import attr
 import tempfile
 from openedx.core.djangoapps.course_groups import cohorts
 import unicodecsv
@@ -666,6 +667,7 @@ class TestProblemGradeReport(TestReportMixin, InstructorTaskModuleTestCase):
         ])
 
 
+@attr('shard_3')
 class TestProblemReportSplitTestContent(TestReportMixin, TestConditionalContent, InstructorTaskModuleTestCase):
     """
     Test the problem report on a course that has split tests.
@@ -1674,6 +1676,7 @@ class TestGradeReportEnrollmentAndCertificateInfo(TestReportMixin, InstructorTas
         self._verify_csv_data(user.username, expected_output)
 
 
+@attr('shard_3')
 @ddt.ddt
 @override_settings(CERT_QUEUE='test-queue')
 class TestCertificateGeneration(InstructorTaskModuleTestCase):