Use XBlock services to get translation at runtime

common/lib/xmodule/xmodule/seq_module.py

@@ -165,6 +165,7 @@ class ProctoringFields(object):
 @XBlock.wants('completion')
 @XBlock.needs('user')
 @XBlock.needs('bookmarks')
+@XBlock.needs('i18n')
 class SequenceModule(SequenceFields, ProctoringFields, XModule):
     """
     Layout module which lays out content in a temporal sequence
@@ -238,6 +239,7 @@ class SequenceModule(SequenceFields, ProctoringFields, XModule):
         )
 
     def student_view(self, context):
+        _ = self.runtime.service(self, "i18n").ugettext
         context = context or {}
         self._capture_basic_metrics()
         banner_text = None
@@ -265,6 +267,7 @@ class SequenceModule(SequenceFields, ProctoringFields, XModule):
         a banner_text or the fragment to display depending on whether
         staff is masquerading.
         """
+        _ = self.runtime.service(self, "i18n").ugettext
         if self.is_time_limited:
             special_exam_html = self._time_limited_student_view()
             if special_exam_html:
@@ -277,6 +280,7 @@ class SequenceModule(SequenceFields, ProctoringFields, XModule):
         runtime user. If so, returns a banner_text or the fragment to
         display depending on whether staff is masquerading.
         """
+        _ = self.runtime.service(self, "i18n").ugettext
         course = self._get_course()
         if not self._can_user_view_content(course):
             if course.self_paced:
@@ -315,6 +319,7 @@ class SequenceModule(SequenceFields, ProctoringFields, XModule):
         sequential.  If banner_text is given, it is added to the
         content.
         """
+        _ = self.runtime.service(self, "i18n").ugettext
         display_items = self.get_display_items()
         self._update_position(context, len(display_items))
 

common/lib/xmodule/xmodule/tests/test_sequence.py

@@ -166,7 +166,7 @@ class SequenceBlockTestCase(XModuleXmlImportTest):
             )
             self.assertIn("seq_module.html", html)
             self.assertIn(
-                "'banner_text': 'Because the due date has passed, "
+                "'banner_text': u'Because the due date has passed, "
                 "this assignment is hidden from the learner.'",
                 html
             )
@@ -208,7 +208,7 @@ class SequenceBlockTestCase(XModuleXmlImportTest):
         """
         self.assertIn("seq_module.html", html)
         self.assertIn(
-            "'banner_text': 'This section is a prerequisite. "
+            "'banner_text': u'This section is a prerequisite. "
             "You must complete this section in order to unlock additional content.'",
             html
         )