Specs for caching and issue controller changes

app/controllers/concerns/issuable_actions.rb

@@ -162,12 +162,10 @@ module IssuableActions
       end
 
       format.json do
-        # We want to pass back the latest valid data, so reload the model
         render json: {
           errors: [
             "Someone edited this #{issuable.human_class_name} at the same time you did. Please refresh your browser and make sure your changes will not unintentionally remove theirs."
-          ],
-          data: serializer.represent(@issuable.reload) # rubocop:disable Gitlab/ModuleWithInstanceVariables
+          ]
         }, status: :conflict
       end
     end

spec/controllers/projects/issues_controller_spec.rb

@@ -379,6 +379,23 @@ describe Projects::IssuesController do
         expect(response).to have_gitlab_http_status(200)
       end
     end
+
+    context 'when getting the changes' do
+      before do
+        project.add_developer(user)
+
+        sign_in(user)
+      end
+
+      it 'returns the necessary data' do
+        go(id: issue.iid)
+
+        data = JSON.parse(response.body)
+
+        expect(data).to include('title_text', 'description', 'description_text')
+        expect(data).to include('task_status', 'lock_version')
+      end
+    end
   end
 
   describe 'Confidential Issues' do

spec/models/concerns/cache_markdown_field_spec.rb

@@ -133,6 +133,15 @@ describe CacheMarkdownField do
     end
   end
 
+  context 'when a markdown field and html field are both set' do
+    it do
+      expect(thing).not_to receive(:refresh_markdown_cache)
+      thing.foo = '_look over there!_'
+      thing.foo_html = '<em>look over there!</em>'
+      thing.save
+    end
+  end
+
   context 'a non-markdown field changed' do
     shared_examples 'with cache version' do |cache_version|
       let(:thing) { ThingWithMarkdownFields.new(foo: markdown, foo_html: html, cached_markdown_version: cache_version) }