Fixes #3915 - No longer public KB answers do not return http 404

app/controllers/knowledge_base/public/base_controller.rb

@@ -105,6 +105,6 @@ class KnowledgeBase::Public::BaseController < ApplicationController
     end
 
     @page_title_error = :not_found
-    render 'knowledge_base/public/not_found'
+    render 'knowledge_base/public/not_found', status: :not_found
   end
 end

spec/requests/knowledge_base_public/answers_spec.rb

@@ -0,0 +1,38 @@
+# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/
+
+require 'rails_helper'
+
+RSpec.describe 'KnowledgeBase public answers', type: :request do
+  include_context 'basic Knowledge Base'
+
+  describe '#show' do
+    context 'when visitor is a guest' do
+      it 'returns OK for published answer' do
+        get help_answer_path(locale_name, category, published_answer)
+        expect(response).to have_http_status :ok
+      end
+
+      it 'returns NOT FOUND for draft answer' do
+        get help_answer_path(locale_name, category, draft_answer)
+        expect(response).to have_http_status :not_found
+      end
+    end
+
+    context 'when visitor is an editor' do
+      before do
+        published_answer && draft_answer
+        authenticated_as(create(:admin), via: :browser)
+      end
+
+      it 'returns OK for published answer' do
+        get help_answer_path(locale_name, category, published_answer)
+        expect(response).to have_http_status :ok
+      end
+
+      it 'returns OK for draft answer' do
+        get help_answer_path(locale_name, category, draft_answer)
+        expect(response).to have_http_status :ok
+      end
+    end
+  end
+end