1 files changed, 39 insertions, 5 deletions
diff --git a/actionpack/test/controller/parameters/parameters_permit_test.rb b/actionpack/test/controller/parameters/parameters_permit_test.rb
index 9f7d14e85d..598cac5156 100644
--- a/actionpack/test/controller/parameters/parameters_permit_test.rb
+++ b/actionpack/test/controller/parameters/parameters_permit_test.rb
@@ -256,7 +256,7 @@ class ParametersPermitTest < ActiveSupport::TestCase
   end
 
   test "to_h returns empty hash on unpermitted params" do
-    assert @params.to_h.is_a? Hash
+    assert @params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
     assert_not @params.to_h.is_a? ActionController::Parameters
     assert @params.to_h.empty?
   end
@@ -264,7 +264,7 @@ class ParametersPermitTest < ActiveSupport::TestCase
   test "to_h returns converted hash on permitted params" do
     @params.permit!
 
-    assert @params.to_h.is_a? Hash
+    assert @params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
     assert_not @params.to_h.is_a? ActionController::Parameters
   end
 
@@ -273,7 +273,7 @@ class ParametersPermitTest < ActiveSupport::TestCase
       ActionController::Parameters.permit_all_parameters = true
       params = ActionController::Parameters.new(crab: "Senjougahara Hitagi")
 
-      assert params.to_h.is_a? Hash
+      assert params.to_h.is_a? ActiveSupport::HashWithIndifferentAccess
       assert_not @params.to_h.is_a? ActionController::Parameters
       assert_equal({ "crab" => "Senjougahara Hitagi" }, params.to_h)
     ensure
@@ -294,7 +294,41 @@ class ParametersPermitTest < ActiveSupport::TestCase
   end
 
   test "to_unsafe_h returns unfiltered params" do
-    assert @params.to_h.is_a? Hash
-    assert_not @params.to_h.is_a? ActionController::Parameters
+    assert @params.to_unsafe_h.is_a? ActiveSupport::HashWithIndifferentAccess
+    assert_not @params.to_unsafe_h.is_a? ActionController::Parameters
+  end
+
+  test "to_h only deep dups Ruby collections" do
+    company = Class.new do
+      attr_reader :dupped
+      def dup; @dupped = true; end
+    end.new
+
+    params = ActionController::Parameters.new(prem: { likes: %i( dancing ) })
+    assert_equal({ 'prem' => { 'likes' => %i( dancing ) } }, params.permit!.to_h)
+
+    params = ActionController::Parameters.new(companies: [ company, :acme ])
+    assert_equal({ 'companies' => [ company, :acme ] }, params.permit!.to_h)
+    assert_not company.dupped
+  end
+
+  test "to_unsafe_h only deep dups Ruby collections" do
+    company = Class.new do
+      attr_reader :dupped
+      def dup; @dupped = true; end
+    end.new
+
+    params = ActionController::Parameters.new(prem: { likes: %i( dancing ) })
+    assert_equal({ 'prem' => { 'likes' => %i( dancing ) } }, params.to_unsafe_h)
+
+    params = ActionController::Parameters.new(companies: [ company, :acme ])
+    assert_equal({ 'companies' => [ company, :acme ] }, params.to_unsafe_h)
+    assert_not company.dupped
+  end
+
+  test "included? returns true when the key is present" do
+    assert @params.include? :person
+    assert @params.include? 'person'
+    assert_not @params.include? :gorilla
   end
 end