tests: fix tests for /comments/new, /post_flags/new.

app/controllers/post_flags_controller.rb

@@ -30,6 +30,6 @@ class PostFlagsController < ApplicationController
   private
 
   def post_flag_params
-    params.require(:post_flag).permit(%i[post_id reason])
+    params.fetch(:post_flag, {}).permit(%i[post_id reason])
   end
 end

test/functional/comments_controller_test.rb

@@ -118,7 +118,7 @@ class CommentsControllerTest < ActionDispatch::IntegrationTest
     context "new action" do
       should "redirect" do
         get_auth new_comment_path, @user
-        assert_redirected_to comments_path
+        assert_response :success
       end
     end