1 files changed, 21 insertions, 9 deletions
diff --git a/actionpack/test/dispatch/routing_test.rb b/actionpack/test/dispatch/routing_test.rb
index 32cd78e492..446b65a9b9 100644
--- a/actionpack/test/dispatch/routing_test.rb
+++ b/actionpack/test/dispatch/routing_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "erb"
 require "abstract_unit"
 require "controller/fake_controllers"
@@ -4414,39 +4416,49 @@ end
 
 class TestInvalidUrls < ActionDispatch::IntegrationTest
   class FooController < ActionController::Base
+    def self.binary_params_for?(action)
+      action == "show"
+    end
+
     def show
       render plain: "foo#show"
     end
   end
 
-  test "invalid UTF-8 encoding is treated as ASCII 8BIT encode" do
+  test "invalid UTF-8 encoding returns a bad request" do
     with_routing do |set|
       set.draw do
         get "/bar/:id", to: redirect("/foo/show/%{id}")
-        get "/foo/show(/:id)", to: "test_invalid_urls/foo#show"
 
         ok = lambda { |env| [200, { "Content-Type" => "text/plain" }, []] }
         get "/foobar/:id", to: ok
 
         ActiveSupport::Deprecation.silence do
-          get "/foo(/:action(/:id))", controller: "test_invalid_urls/foo"
           get "/:controller(/:action(/:id))"
         end
       end
 
       get "/%E2%EF%BF%BD%A6"
-      assert_response :not_found
+      assert_response :bad_request
 
       get "/foo/%E2%EF%BF%BD%A6"
-      assert_response :not_found
-
-      get "/foo/show/%E2%EF%BF%BD%A6"
-      assert_response :ok
+      assert_response :bad_request
 
       get "/bar/%E2%EF%BF%BD%A6"
-      assert_response :redirect
+      assert_response :bad_request
 
       get "/foobar/%E2%EF%BF%BD%A6"
+      assert_response :bad_request
+    end
+  end
+
+  test "params encoded with binary_params_for? are treated as ASCII 8bit" do
+    with_routing do |set|
+      set.draw do
+        get "/foo/show(/:id)", to: "test_invalid_urls/foo#show"
+      end
+
+      get "/foo/show/%E2%EF%BF%BD%A6"
       assert_response :ok
     end
   end