Fix UnicodeError with anonymous student IDs

common/djangoapps/student/tests/tests.py

+# -*- coding: utf-8 -*-
 """
 This file demonstrates writing tests using the unittest module. These will pass
 when you run "manage.py test".
@@ -736,3 +737,11 @@ class AnonymousLookupTable(TestCase):
         real_user = user_by_anonymous_id(anonymous_id)
         self.assertEqual(self.user, real_user)
         self.assertEqual(anonymous_id, anonymous_id_for_user(self.user, self.course.id, save=False))
+
+    def test_roundtrip_with_unicode_course_id(self):
+        course2 = CourseFactory.create(org=self.COURSE_ORG, display_name=u"Omega Course Ω", number=self.COURSE_SLUG)
+        CourseEnrollment.enroll(self.user, course2.id)
+        anonymous_id = anonymous_id_for_user(self.user, course2.id)
+        real_user = user_by_anonymous_id(anonymous_id)
+        self.assertEqual(self.user, real_user)
+        self.assertEqual(anonymous_id, anonymous_id_for_user(self.user, course2.id, save=False))