2 files changed, 30 insertions, 0 deletions
diff --git a/actionpack/test/controller/parameters/accessors_test.rb b/actionpack/test/controller/parameters/accessors_test.rb
index bd43ff7697..08b3d81bf0 100644
--- a/actionpack/test/controller/parameters/accessors_test.rb
+++ b/actionpack/test/controller/parameters/accessors_test.rb
@@ -134,4 +134,13 @@ class ParametersAccessorsTest < ActiveSupport::TestCase
     params1 = ActionController::Parameters.new(hash1)
     assert(params1 == hash1)
   end
+
+  test "inspect shows both class name and parameters" do
+    assert_equal(
+      '<ActionController::Parameters {"person"=>{"age"=>"32", '\
+      '"name"=>{"first"=>"David", "last"=>"Heinemeier Hansson"}, ' \
+      '"addresses"=>[{"city"=>"Chicago", "state"=>"Illinois"}]}}>',
+      @params.inspect
+    )
+  end
 end
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 3299f2d9d0..96048e2868 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -27,6 +27,27 @@ class ParametersPermitTest < ActiveSupport::TestCase
     end
   end
 
+  def walk_permitted params
+    params.each do |k,v|
+      case v
+      when ActionController::Parameters
+        walk_permitted v
+      when Array
+        v.each { |x| walk_permitted v }
+      end
+    end
+  end
+
+  test 'iteration should not impact permit' do
+    hash = {"foo"=>{"bar"=>{"0"=>{"baz"=>"hello", "zot"=>"1"}}}}
+    params = ActionController::Parameters.new(hash)
+
+    walk_permitted params
+
+    sanitized = params[:foo].permit(bar: [:baz])
+    assert_equal({"0"=>{"baz"=>"hello"}}, sanitized[:bar].to_unsafe_h)
+  end
+
   test 'if nothing is permitted, the hash becomes empty' do
     params = ActionController::Parameters.new(id: '1234')
     permitted = params.permit