factory_girl.md

title	category	layout
FactoryGirl	Ruby libraries	default-ad

Factories

FactoryGirl.define do
  factory :user do
    first_name 'John'
    last_name  'Doe'
    birthdate  { 21.years.ago }
    admin false

    sequence(:username) { |n| "user#{n}" }
  end
end

# Also available:
factory :user, class: 'User'
factory :user, aliases: [:author]

Using

FactoryGirl.build(:user)

build(:user)          # not saved
create(:user)         # saved
attributes_for(:user) # hash
build_stubbed(:user)  # stubbed out attributes

build(:user, name: 'John')

create_list(:user, 3)
build_list(:user, 3)

Associations

factory :post do
  association :author, factory: :user
  association :author, factory: [:user, :admin]

  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

Traits

factory :user do
  trait :admin do
    admin true
  end
end

create :user, :admin

Nested factories

factory :user do
  first_name 'John'

  factory :sample_user do
    first_name { FFaker::Name.first_name }
  end
end

# create :sample_user

# Also: factory :sample_user, parent: :user

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)

Paths

test/factories.rb
spec/factories.rb
test/factories/*.rb
spec/factories/*.rb

See also

• http://rubydoc.info/gems/factory_girl/file/GETTING_STARTED.md