DEV: Improve specs to provide a better error message.

spec/serializers/web_hook_topic_view_serializer_spec.rb

@@ -11,20 +11,47 @@ RSpec.describe WebHookTopicViewSerializer do
     )
   end
 
-  it 'should only include the required keys' do
-    count = serializer.as_json.keys.count
-    difference = count - 30
+  before do
+    SiteSetting.tagging_enabled = true
+  end
 
-    expect(difference).to eq(0), lambda {
-      message = ""
-
-      if difference < 0
-        message << "#{difference * -1} key(s) have been removed from this serializer."
-      else
-        message << "#{difference} key(s) have been added to this serializer."
-      end
-
-      message << "\nPlease verify if those key(s) are required as part of the web hook's payload."
+  it 'should only include the keys that are sent out in the webhook' do
+    expected_keys = %i{
+      id
+      title
+      fancy_title
+      posts_count
+      created_at
+      views
+      reply_count
+      like_count
+      last_posted_at
+      visible
+      closed
+      archived
+      archetype
+      slug
+      category_id
+      word_count
+      deleted_at
+      user_id
+      featured_link
+      pinned_globally
+      pinned_at
+      pinned_until
+      unpinned
+      pinned
+      highest_post_number
+      deleted_by
+      bookmarked
+      participant_count
+      created_by
+      last_poster
+      tags
     }
+
+    keys = serializer.as_json.keys
+
+    expect(serializer.as_json.keys).to contain_exactly(*expected_keys)
   end
 end