Write a test for the XML unicode conversion fix.

common/lib/xmodule/xmodule/modulestore/tests/test_xml.py

-from xmodule.modulestore import Location
+from xmodule.course_module import CourseDescriptor
 from xmodule.modulestore.xml import XMLModuleStore
-from xmodule.modulestore.xml_importer import import_from_xml
 
 from .test_modulestore import check_path_to_location
 from . import DATA_DIR
@@ -15,3 +14,16 @@ class TestXMLModuleStore(object):
         print "finished import"
 
         check_path_to_location(modulestore)
+
+    def test_unicode_chars_in_xml_content(self):
+        # edX/full/6.002_Spring_2012 has non-ASCII chars, and during
+        # uniquification of names, would raise a UnicodeError. It no longer does.
+
+        # Load the course, but don't make error modules.  This will succeed,
+        # but will record the errors.
+        modulestore = XMLModuleStore(DATA_DIR, course_dirs=['full'], load_error_modules=False)
+
+        # Look up the errors during load. There should be none.
+        location = CourseDescriptor.id_to_location("edX/full/6.002_Spring_2012")
+        errors = modulestore.get_item_errors(location)
+        assert errors == []