openproject/spec/factories/cost_entry_factory.rb

FactoryGirl.define do
  factory :cost_entry  do
    project
    user { FactoryGirl.create(:user, :member_in_project => project)}
    work_package { FactoryGirl.create(:work_package, :project => project) }
    cost_type
    spent_on Date.today
    units 1
    comments ''
  end
end