FactoryGirl’s traits are an outstanding way to
DRY up your tests and factories.
Traits allow you to group attributes, callbacks, and associations in one concise area together and then apply them to any factory. Traits specify the states/types of factories.
We can now define new factory
admin_with_profile_photo with combination of above 2 traits, which will create new admin user with profile photo. This is a good way to
DRY up factories by reusing traits.