include assignments for graded objects in external export

closes #CNVS-35995

Change-Id: Icdea27f8ea3b3ad09393bfdbe5ba369e529e8a2d
Reviewed-on: https://gerrit.instructure.com/107034
Tested-by: Jenkins
Reviewed-by: Christian Prescott <cprescott@instructure.com>
QA-Review: Leo Abner <rabner@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>

app/models/content_export.rb

@@ -375,6 +375,9 @@ class ContentExport < ActiveRecord::Base
     # for integrating selective exports with external content
     if (type = Canvas::Migration::ExternalContent::Translator::CLASSES_TO_TYPES[obj.class])
       exported_assets << "#{type}_#{obj.id}"
+      if obj.respond_to?(:for_assignment?) && obj.for_assignment?
+        exported_assets << "assignment_#{obj.assignment_id}"
+      end
     end
   end
 

spec/models/content_migration/course_copy_external_content_spec.rb

@@ -115,8 +115,14 @@ describe ContentMigration do
     it "should send a list of exported assets to the external service when selectively exporting" do
       assmt = @copy_from.assignments.create!
       other_assmt = @copy_from.assignments.create!
+      graded_quiz = @copy_from.quizzes.create!
+      graded_quiz.generate_quiz_data
+      graded_quiz.workflow_state = 'available'
+      graded_quiz.save!
+
       cm = @copy_from.context_modules.create!(:name => "some module")
       item = cm.add_item(:id => assmt.id, :type => 'assignment')
+      item2 = cm.add_item(:id => graded_quiz.id, :type => 'quiz')
 
       TestExternalContentService.stubs(:applies_to_course?).returns(true)
       TestExternalContentService.stubs(:export_completed?).returns(true)
@@ -126,7 +132,8 @@ describe ContentMigration do
       @cm.save!
 
       TestExternalContentService.expects(:begin_export).with(@copy_from,
-        {:selective => true, :exported_assets => ["context_module_#{cm.id}", "assignment_#{assmt.id}"]})
+        {:selective => true, :exported_assets =>
+          ["context_module_#{cm.id}", "assignment_#{assmt.id}", "quiz_#{graded_quiz.id}", "assignment_#{graded_quiz.assignment.id}"]})
 
       run_course_copy
     end