Add test for Hash-like object being passed to partial `locals`

The test passes an instance of `ActionController::Parameters` that acts
like a Hash but does not respond to some Hash methods like
`symbolize_keys`.

Moreover, if someone were to call `to_h` on the value it would fail since
the parameter is not permitted. So this is a great way to ensure that the
partial rendering pipeline does not mess with `locals`.

1 files changed, 10 insertions, 0 deletions

diff --git a/actionview/test/actionpack/controller/render_test.rb b/actionview/test/actionpack/controller/render_test.rb
index 02df84da8e..727d3fbc1a 100644
--- a/actionview/test/actionpack/controller/render_test.rb
+++ b/actionview/test/actionpack/controller/render_test.rb
@@ -485,6 +485,10 @@ class TestController < ActionController::Base
     render partial: "customer", locals: { customer: Customer.new("david") }
   end
 
+  def partial_with_hashlike_locals
+    render partial: "customer", locals: ActionController::Parameters.new(customer: Customer.new("david"))
+  end
+
   def partial_with_form_builder
     render partial: ActionView::Helpers::FormBuilder.new(:post, nil, view_context, {})
   end
@@ -687,6 +691,7 @@ class RenderTest < ActionController::TestCase
     get :partial_with_locals, to: "test#partial_with_locals"
     get :partial_with_nested_object, to: "test#partial_with_nested_object"
     get :partial_with_nested_object_shorthand, to: "test#partial_with_nested_object_shorthand"
+    get :partial_with_hashlike_locals, to: "test#partial_with_hashlike_locals"
     get :partials_list, to: "test#partials_list"
     get :render_action_hello_world, to: "test#render_action_hello_world"
     get :render_action_hello_world_as_string, to: "test#render_action_hello_world_as_string"
@@ -1287,6 +1292,11 @@ class RenderTest < ActionController::TestCase
     assert_equal "Hello: david", @response.body
   end
 
+  def test_partial_with_hashlike_locals
+    get :partial_with_hashlike_locals
+    assert_equal "Hello: david", @response.body
+  end
+
   def test_partial_with_form_builder
     get :partial_with_form_builder
     assert_equal "<label for=\"post_title\">Title</label>\n", @response.body