Build an app instance compatible with with_routing

As of rails/rails#49819 the internals of
`ActionDispatch::Assertions::RoutingAssertions` changed and the way we
were building our app instance was no compatible with it. This gets us
back to passing tests for Rails 7.2+. I hope 🤞

Author: stevenharman

test/helper.rb

@@ -20,20 +20,46 @@ def before_setup
   end
 end
 
+class RoutedRackApp
+  class Config < Struct.new(:middleware)
+  end
+
+  attr_reader :routes
+
+  def initialize(routes, &blk)
+    @routes = routes
+    @stack = ActionDispatch::MiddlewareStack.new(&blk)
+    @app = @stack.build(@routes)
+  end
+
+  def call(env)
+    @app.call(env)
+  end
+
+  def config
+    Config.new(@stack)
+  end
+end
+
 class ActionDispatch::IntegrationTest < ActiveSupport::TestCase
   include ActionDispatch::SharedRoutes
 
-  def self.build_app(routes = nil)
+  def self.build_app(routes, options)
     RoutedRackApp.new(routes || ActionDispatch::Routing::RouteSet.new) do |middleware|
       middleware.use ActionDispatch::DebugExceptions
+      middleware.use ActionDispatch::ActionableExceptions
       middleware.use ActionDispatch::Callbacks
       middleware.use ActionDispatch::Cookies
       middleware.use ActionDispatch::Flash
+      middleware.use Rack::MethodOverride
       middleware.use Rack::Head
+      middleware.use ActionDispatch::Session::ActiveRecordStore, options.reverse_merge(key: "_session_id")
       yield(middleware) if block_given?
     end
   end
 
+  self.app = build_app(nil, {})
+
   private
 
     def with_test_route_set(options = {})
@@ -45,10 +71,7 @@ def with_test_route_set(options = {})
           actions.each { |action| get action, controller: "#{controller_namespace}/test" }
         end
 
-        @app = self.class.build_app(set) do |middleware|
-          middleware.use ActionDispatch::Session::ActiveRecordStore, options.reverse_merge(:key => '_session_id')
-          middleware.delete ActionDispatch::ShowExceptions
-        end
+        self.class.app = self.class.build_app(set, options)
 
         yield
       end
@@ -63,17 +86,4 @@ def with_store(class_name)
     end
 end
 
-class RoutedRackApp
-  attr_reader :routes
-
-  def initialize(routes, &blk)
-    @routes = routes
-    @stack = ActionDispatch::MiddlewareStack.new(&blk).build(@routes)
-  end
-
-  def call(env)
-    @stack.call(env)
-  end
-end
-
 ActiveSupport::TestCase.test_order = :random

test/logger_silencer_test.rb

@@ -39,7 +39,9 @@ def setup
   def test_log_silencer_with_logger_not_raise_exception
     with_logger ActiveSupport::Logger.new(Tempfile.new("tempfile")) do
       with_test_route_set do
-        get "/set_session_value"
+        assert_nothing_raised do
+          get "/set_session_value"
+        end
       end
     end
   end