Merge pull request #2374 from wairbut-m2c/upload_documents_feature

Upload documents feature

spec/shared/features/nested_documentable.rb

@@ -51,12 +51,12 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
     scenario "Should show max documents warning when max documents allowed limit is reached", :js do
       login_as user_to_login
       visit send(path, arguments)
-
       documentable.class.max_documents_allowed.times.each do
-        click_link "Add new document"
+        documentable_attach_new_file("spec/fixtures/files/empty.pdf")
       end
 
       expect(page).to have_css ".max-documents-notice", visible: true
+      expect(page).to have_content 'Remove document'
     end
 
     scenario "Should hide max documents warning after any document removal", :js do
@@ -67,7 +67,7 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
         click_link "Add new document"
       end
 
-      all("a", text: "Remove document").last.click
+      all("a", text: "Cancel").last.click
 
       expect(page).to have_css ".max-documents-notice", visible: false
     end