Import test course instead of using XML-backed course.

lms/djangoapps/django_comment_client/tests/test_models.py

@@ -5,9 +5,11 @@ from django.test.testcases import TestCase
 from nose.plugins.attrib import attr
 from opaque_keys.edx.keys import CourseKey
 
-from xmodule.modulestore.tests.django_utils import TEST_DATA_MIXED_TOY_MODULESTORE
 import django_comment_common.models as models
-from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
+from xmodule.modulestore.tests.django_utils import (
+    TEST_DATA_MIXED_TOY_MODULESTORE, ModuleStoreTestCase
+)
+from xmodule.modulestore.tests.factories import ToyCourseFactory
 
 
 @attr('shard_1')
@@ -23,7 +25,7 @@ class RoleClassTestCase(ModuleStoreTestCase):
         # For course ID, syntax edx/classname/classdate is important
         # because xmodel.course_module.id_to_location looks for a string to split
 
-        self.course_id = CourseKey.from_string("edX/toy/2012_Fall")
+        self.course_id = ToyCourseFactory.create().id
         self.student_role = models.Role.objects.get_or_create(name="Student",
                                                               course_id=self.course_id)[0]
         self.student_role.add_permission("delete_thread")