Limit spam check fields for bot authors

ee/app/models/ee/issue.rb

@@ -70,7 +70,7 @@ module EE
 
     # override
     def check_for_spam?
-      author.bot? || super
+      author.bot? && (title_changed? || description_changed? || confidential_changed?) || super
     end
 
     # override

ee/spec/models/issue_spec.rb

@@ -346,6 +346,48 @@ RSpec.describe Issue do
     end
   end
 
+  describe '#check_for_spam?' do
+    using RSpec::Parameterized::TableSyntax
+    let_it_be(:reusable_project) { create(:project) }
+    let_it_be(:author) { ::User.support_bot }
+    let(:planning)    { create(:project_label, project: reusable_project, name: 'Planning') }
+
+    where(:visibility_level, :confidential, :new_attributes, :check_for_spam?) do
+      Gitlab::VisibilityLevel::PUBLIC   | false | { description: 'woo' } | true
+      Gitlab::VisibilityLevel::PUBLIC   | false | { title: 'woo' } | true
+      Gitlab::VisibilityLevel::PUBLIC   | true  | { confidential: false } | true
+      Gitlab::VisibilityLevel::PUBLIC   | true  | { description: 'woo' } | true
+      Gitlab::VisibilityLevel::PUBLIC   | false | { title: 'woo', confidential: true } | true
+      Gitlab::VisibilityLevel::INTERNAL | false | { description: 'woo' } | true
+      Gitlab::VisibilityLevel::PRIVATE  | true  | { description: 'woo' } | true
+      Gitlab::VisibilityLevel::PUBLIC   | false | { description: 'original description' } | false
+    end
+
+    with_them do
+      context 'when author is a bot' do
+        it 'checks for spam on all issues', :focus => true do
+          project = reusable_project
+          project.update(visibility_level: visibility_level)
+          issue = create(:issue, project: project, confidential: confidential, description: 'original description', author: author)
+
+          issue.assign_attributes(new_attributes)
+
+          expect(issue.check_for_spam?).to eq(check_for_spam?)
+        end
+
+        it 'does not check for spam when milestone is updated', :focus => true do
+          project = reusable_project
+          project.update(visibility_level: visibility_level)
+          issue = create(:issue, project: project, confidential: confidential, description: 'original description', author: author)
+
+          issue.assign_attributes(new_attributes)
+
+          expect(issue.check_for_spam?).to eq(check_for_spam?)
+        end
+      end
+    end
+  end
+
   describe '#weight' do
     where(:license_value, :database_value, :expected) do
       true  | 5   | 5