Fix deprecation warning for :unprocessable_entity in scaffold-generated tests with Rack 3.2

For rack 3.1 and higher, this change uses `:unprocessable_content` instead of `:unprocessable_entity`.
For rack 3.0 and below, it continues to use `:unprocessable_entity`.

Author: taketo1113

lib/generators/rspec/scaffold/templates/api_controller_spec.rb

@@ -79,7 +79,7 @@
     context "with invalid params" do
       it "renders a JSON response with errors for the new <%= singular_table_name %>" do
         post :create, params: {<%= singular_table_name %>: invalid_attributes}, session: valid_session
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
         expect(response.content_type).to eq('application/json')
       end
     end
@@ -110,7 +110,7 @@
       it "renders a JSON response with errors for the <%= singular_table_name %>" do
         <%= file_name %> = <%= class_name %>.create! valid_attributes
         put :update, params: {id: <%= file_name %>.to_param, <%= singular_table_name %>: invalid_attributes}, session: valid_session
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
         expect(response.content_type).to eq('application/json')
       end
     end

lib/generators/rspec/scaffold/templates/api_request_spec.rb

@@ -79,7 +79,7 @@
       it "renders a JSON response with errors for the new <%= singular_table_name %>" do
         post <%= index_helper %>_url,
              params: { <%= singular_table_name %>: invalid_attributes }, headers: valid_headers, as: :json
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
         expect(response.content_type).to match(a_string_including("application/json"))
       end
     end
@@ -113,7 +113,7 @@
         <%= file_name %> = <%= class_name %>.create! valid_attributes
         patch <%= show_helper %>,
               params: { <%= singular_table_name %>: invalid_attributes }, headers: valid_headers, as: :json
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
         expect(response.content_type).to match(a_string_including("application/json"))
       end
     end

lib/generators/rspec/scaffold/templates/controller_spec.rb

@@ -92,7 +92,7 @@
     context "with invalid params" do
       it "renders a response with 422 status (i.e. to display the 'new' template)" do
         post :create, params: {<%= singular_table_name %>: invalid_attributes}, session: valid_session
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
       end
     end
   end
@@ -121,7 +121,7 @@
       it "renders a response with 422 status (i.e. to display the 'edit' template)" do
         <%= file_name %> = <%= class_name %>.create! valid_attributes
         put :update, params: {id: <%= file_name %>.to_param, <%= singular_table_name %>: invalid_attributes}, session: valid_session
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
       end
     end
   end

lib/generators/rspec/scaffold/templates/request_spec.rb

@@ -85,7 +85,7 @@
 
       it "renders a response with 422 status (i.e. to display the 'new' template)" do
         post <%= index_helper %>_url, params: { <%= singular_table_name %>: invalid_attributes }
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
       end
     end
   end
@@ -115,7 +115,7 @@
       it "renders a response with 422 status (i.e. to display the 'edit' template)" do
         <%= file_name %> = <%= class_name %>.create! valid_attributes
         patch <%= show_helper %>, params: { <%= singular_table_name %>: invalid_attributes }
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(<%= Rack::Utils::SYMBOL_TO_STATUS_CODE.key(422).inspect %>)
       end
     end
   end

spec/generators/rspec/scaffold/scaffold_generator_spec.rb

@@ -32,6 +32,16 @@
           contain(/renders a response with 422 status \(i.e. to display the 'new' template\)/)
             .and(contain(/renders a response with 422 status \(i.e. to display the 'edit' template\)/))
         )
+
+        expect(
+          filename
+        ).to(
+          if Gem::Version.new(Rack::RELEASE) < Gem::Version.new("3.1")
+            contain(/expect\(response\).to have_http_status\(:unprocessable_entity\)/)
+          else
+            contain(/expect\(response\).to have_http_status\(:unprocessable_content\)/)
+          end
+        )
       end
     end
 
@@ -99,6 +109,16 @@
         expect(filename).to contain(/renders a response with 422 status \(i.e. to display the 'new' template\)/)
                               .and(contain(/renders a response with 422 status \(i.e. to display the 'edit' template\)/))
 
+        expect(
+          filename
+        ).to(
+          if Gem::Version.new(Rack::RELEASE) < Gem::Version.new("3.1")
+            contain(/expect\(response\).to have_http_status\(:unprocessable_entity\)/)
+          else
+            contain(/expect\(response\).to have_http_status\(:unprocessable_content\)/)
+          end
+        )
+
         expect(filename).not_to contain(/"renders a JSON response with the new \w+"/)
         expect(filename).not_to contain(/"renders a JSON response with errors for the new \w+"/)
         expect(filename).not_to contain(/"renders a JSON response with the \w+"/)