Factories
Defining factories
FactoryBot.define do
factory :user do
first_name 'John'
last_name 'Doe'
birthdate { 21.years.ago }
admin false
sequence(:username) { |n| "user#{n}" }
end
end
See: Defining factories
Extra options
Custom class names
factory :user, class: 'User' do
···
end
Aliases
factory :user, aliases: [:author] do
···
end
Using
Build a model
FactoryBot.build(:user)
Other ways
build(:user) # → model (not saved)
create(:user) # → model (saved)
attributes_for(:user) # → hash
build_stubbed(:user) # stubbed out attributes
With options
build(:user, name: 'John')
Lists
create_list(:user, 3)
build_list(:user, 3)
Associations
Defining
factory :post do
association :author, factory: :user
association :author, factory: [:user, :admin]
end
or
factory :post do
author # assumes there's a factory :author
end
After-create hooks
factory :post do
after :create do |post|
create :theme, post: post # has_one
create_list :comment, 3, post: post # has_many
end
end
Other features
Traits
factory :user do
trait :admin do
admin true
end
end
create :user, :admin
Traits allow you to group attributes together. See: Traits
Nested factories
factory :user do
first_name 'John'
factory :sample_user do
first_name { FFaker::Name.first_name }
end
end
create :sample_user
See: Inheritance
Sub-factories
factory :user do
···
end
factory :sample_user, parent: :user do
first_name { FFaker::Name.first_name }
end
create :sample_user
Works the same as nested factories.
Options (transients)
factory :user do
transient do
upcased true
end
after :create do |user, options|
user.name.upcase! if options.upcased
end
end
create(user, upcased: true)
Transient attributes will not get passed to the model, but will be available in after-create hooks. See: Transient attributes
Paths
- test/factories.rb
- spec/factories.rb
- test/factories/*.rb
- spec/factories/*.rb
Place your factories in these locations.