Add acceptance test for behavior when & is in problem xml.

Part of STUD-91

cms/djangoapps/contentstore/features/component_settings_editor_helpers.py

@@ -4,6 +4,7 @@
 from lettuce import world
 from nose.tools import assert_equal, assert_in  # pylint: disable=E0611
 from terrain.steps import reload_the_page
+from common import type_in_codemirror
 
 
 @world.absorb
@@ -115,6 +116,17 @@ def edit_component():
 
 
 @world.absorb
+def enter_xml_in_advanced_problem(step, text):
+    """
+    Edits an advanced problem (assumes only on page),
+    types the provided XML, and saves the component.
+    """
+    world.edit_component()
+    type_in_codemirror(0, text)
+    world.save_component(step)
+
+
+@world.absorb
 def verify_setting_entry(setting, display_name, value, explicitly_set):
     """
     Verify the capa module fields are set as expected in the

cms/djangoapps/contentstore/features/course-export.feature

@@ -9,3 +9,11 @@ Feature: Course export
     And I export the course
     Then I get an error dialog
     And I can click to go to the unit with the error
+
+  Scenario: User is directed to problem with & in it when export fails
+    Given I am in Studio editing a new unit
+    When I add a "Blank Advanced Problem" "Advanced Problem" component
+    And I edit and enter an ampersand
+    And I export the course
+    Then I get an error dialog
+    And I can click to go to the unit with the error

cms/djangoapps/contentstore/features/course-export.py

@@ -2,7 +2,6 @@
 #pylint: disable=C0111
 
 from lettuce import world, step
-from common import type_in_codemirror
 from nose.tools import assert_true, assert_equal
 
 
@@ -16,9 +15,7 @@ def i_export_the_course(step):
 
 @step('I edit and enter bad XML$')
 def i_enter_bad_xml(step):
-    world.edit_component()
-    type_in_codemirror(
-        0,
+    world.enter_xml_in_advanced_problem(step,
         """<problem><h1>Smallest Canvas</h1>
             <p>You want to make the smallest canvas you can.</p>
             <multiplechoiceresponse>
@@ -29,7 +26,11 @@ def i_enter_bad_xml(step):
             </multiplechoiceresponse>
             </problem>"""
     )
-    world.save_component(step)
+
+
+@step('I edit and enter an ampersand$')
+def i_enter_bad_xml(step):
+    world.enter_xml_in_advanced_problem(step, "<problem>&</problem>")
 
 
 @step('I get an error dialog$')