Testando o modelo Rails`default_scope` com RSpec

class Trip < ActiveRecord::Base
default_scope
{ order(departure: :asc) }
...
end
RSpec.describe Trip, type: :model do
it
"applies a default scope to collections by departure ascending" do
expect
(Trip.all.to_sql).to eq Trip.all.order(departure: :asc).to_sql
end
end