feat: Add an action on automation to change the priority (#6925)

spec/services/action_service_spec.rb

@@ -11,5 +11,21 @@ describe ::ActionService do
       expect(conversation.reload.status).to eq('resolved')
     end
   end
+
+  describe '#change_priority' do
+    let(:conversation) { create(:conversation) }
+    let(:action_service) { described_class.new(conversation) }
+
+    it 'changes the priority of the conversation to medium' do
+      action_service.change_priority(['medium'])
+      expect(conversation.reload.priority).to eq('medium')
+    end
+
+    it 'changes the priority of the conversation to nil' do
+      action_service.change_priority(['nil'])
+      expect(conversation.reload.priority).to be_nil
+    end
+  end
+
   # TODO: Expand this test suite
 end