1 files changed, 8 insertions, 1 deletions
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 7fe8e6051b..ad970f0a9a 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -3,7 +3,7 @@ require 'action_controller/metal/strong_parameters'
 
 class ParametersPermitTest < ActiveSupport::TestCase
   setup do
-    @params = ActionController::Parameters.new({ person: { 
+    @params = ActionController::Parameters.new({ person: {
       age: "32", name: { first: "David", last: "Heinemeier Hansson" }
     }})
   end
@@ -57,6 +57,13 @@ class ParametersPermitTest < ActiveSupport::TestCase
     assert_equal @params.permitted?, @params.dup.permitted?
   end
 
+  test "permit is recursive" do
+    @params.permit!
+    assert @params.permitted?
+    assert @params[:person].permitted?
+    assert @params[:person][:name].permitted?
+  end
+
   test "permitted takes a default value when Parameters.permit_all_parameters is set" do
     begin
       ActionController::Parameters.permit_all_parameters = true