1 files changed, 7 insertions, 0 deletions
diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index a3295a6e69..913e2b5e29 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -135,6 +135,7 @@ module TestHelpers
     def make_basic_app
       require "rails"
       require "action_controller/railtie"
+      require "action_view/railtie"
 
       app = Class.new(Rails::Application)
       app.config.eager_load = false
@@ -242,6 +243,12 @@ module TestHelpers
       end
     end
 
+    def gsub_app_file(path, regexp, *args, &block)
+      path = "#{app_path}/#{path}"
+      content = File.read(path).gsub(regexp, *args, &block)
+      File.open(path, 'wb') { |f| f.write(content) }
+    end
+
     def remove_file(path)
       FileUtils.rm_rf "#{app_path}/#{path}"
     end