discourse/spec/fabricators/site_content_fabricator.rb

Fabricator(:site_content) do
  content_type 'great.poem'
  content "%{flower} are red. %{food} are blue."
end

Fabricator(:site_content_basic, from: :site_content) do
  content_type 'breaking.bad'
  content "best show ever"
end

Fabricator(:site_content_site_setting, from: :site_content) do
  content_type 'site.replacement'
  content "%{title} is evil."
end