1 files changed, 9 insertions, 0 deletions
diff --git a/railties/test/env_helpers.rb b/railties/test/env_helpers.rb
index fea06e528f..330fe150ca 100644
--- a/railties/test/env_helpers.rb
+++ b/railties/test/env_helpers.rb
@@ -12,6 +12,15 @@ module EnvHelpers
     end
   end
 
+  def with_rack_env(env)
+    Rails.instance_variable_set :@_env, nil
+    switch_env 'RACK_ENV', env do
+      switch_env 'RAILS_ENV', nil do
+        yield
+      end
+    end
+  end
+
   def switch_env(key, value)
     old, ENV[key] = ENV[key], value
     yield