add test

spec/features/merge_requests/edit_mr_spec.rb

+require 'spec_helper'
+
+feature 'Create New Merge Request', feature: true do
+  let(:user) { create(:user) }
+  let(:project) { create(:project, :public) }
+  let(:merge_request) { create(:merge_request, :with_diffs, source_project: project) }
+
+  before do
+    project.team << [user, :master]
+
+    login_as user
+
+    visit edit_namespace_project_merge_request_path(project.namespace, project, merge_request)
+  end
+
+  context 'editing a MR', js: true do
+    it 'should be able submit with quick_submit' do
+      fill_in "merge_request_title", with: "Orphaned MR test"
+
+      keypress = "var e = $.Event('keydown', { keyCode: 13, ctrlKey: true }); $('.merge-request-form').trigger(e);"
+      page.driver.execute_script(keypress)
+      sleep 2
+
+      expect(find('h2.title')).to have_text('Orphaned MR test')
+    end
+  end
+end
\ No newline at end of file