Merge pull request #22743 from maclover7/fix-22738

Add #== back to ActionDispatch::MiddlewareStack::Middleware

actionpack/lib/action_dispatch/middleware/stack.rb

@@ -14,6 +14,15 @@ def initialize(klass, args, block)
 
       def name; klass.name; end
 
+      def ==(middleware)
+        case middleware
+        when Middleware
+          klass == middleware.klass
+        when Class
+          klass == middleware
+        end
+      end
+
       def inspect
         if klass.is_a?(Class)
           klass.to_s

actionpack/test/dispatch/middleware_stack_test.rb

@@ -131,4 +131,16 @@ def test_delete_works
       assert_equal BazMiddleware, @stack.last.klass
     end
   end
+
+  test "can check if Middleware are equal - Class" do
+    assert_equal BazMiddleware, BazMiddleware
+  end
+
+  test "can check if Middleware are equal - Middleware" do
+    assert_equal @stack.middlewares.first, @stack.middlewares.first
+  end
+
+  test "klass is correct" do
+    assert_equal @stack.middlewares.first.klass, FooMiddleware
+  end
 end