Show redirect response code in assert_response messages

Follow-up to PR #19977, which helpfully added the redirection path to the error message of assert_response if response is a redirection, but which removed the response code, obscuring the type of redirect.

This PR:

- brings back the response code in the error message,

- updates the tests so the new messages can be tested,

- and adds test cases for the change.

1 files changed, 8 insertions, 10 deletions

diff --git a/actionpack/lib/action_dispatch/testing/assertions/response.rb b/actionpack/lib/action_dispatch/testing/assertions/response.rb
index cc2a2fb119..c138660a21 100644
--- a/actionpack/lib/action_dispatch/testing/assertions/response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/response.rb
@@ -85,17 +85,15 @@ module ActionDispatch
           end
         end
 
-        def generate_response_message(type)
-          message = "Expected response to be a <#{type}>, but was"
-
-          if @response.redirection?
-            redirect_is = normalize_argument_to_redirection(@response.location)
-            message << " a redirect to <#{redirect_is}>"
-          else
-            message << " <#{@response.response_code}>"
-          end
+        def generate_response_message(type, code = @response.response_code)
+          "Expected response to be a <#{type}>, but was a <#{code}>"
+          .concat location_if_redirected
+        end
 
-          message
+        def location_if_redirected
+          return '' unless @response.redirection? && @response.location.present?
+          location = normalize_argument_to_redirection(@response.location)
+          " redirect to <#{location}>"
         end
     end
   end