Correctly compute course image location when using mongo modulestore

[LMS-2073]
[STUD-1197]

cms/djangoapps/contentstore/tests/test_utils.py

@@ -2,7 +2,6 @@
 import collections
 import copy
 import mock
-from unittest import expectedFailure
 
 from django.test import TestCase
 from django.test.utils import override_settings
@@ -168,7 +167,6 @@ class CourseImageTestCase(TestCase):
         url = utils.course_image_url(course)
         self.assertEquals(url, '/c4x/edX/999/asset/{0}'.format(course.course_image))
 
-    @expectedFailure
     def test_non_ascii_image_name(self):
         # Verify that non-ascii image names are cleaned
         course = CourseFactory.create(course_image=u'before_\N{SNOWMAN}_after.jpg')

cms/djangoapps/contentstore/utils.py

@@ -191,7 +191,7 @@ def get_lms_link_for_about_page(location):
 
 def course_image_url(course):
     """Returns the image url for the course."""
-    loc = course.location._replace(tag='c4x', category='asset', name=course.course_image)
+    loc = StaticContent.compute_location(course.location.org, course.location.course, course.course_image)
     path = StaticContent.get_url_path_from_location(loc)
     return path