Factory Girl Testing Setup By ThoughtBot
Factory Girl is a testing framework for Ruby On Rails written by ThoughtBot.comThis page has notes from ThoughtBot about how to do Factory Girl testing setup.
Thanks to Dan Croak, author of Factory Girl, for providing these ideas.
Related: Factory Girl Testing Speed By ThoughtBot
To create a collection of users
Suppose you have a factory like this:
user = Factory(:user)
To create 3 users, we call the factory in a loop like this:
users = 3.times { Factory(:user) }
To create a collection for the "many" in a has_many
Do it in FactoryGirl's after_create on the belonging object.
Suppose you have a class "User" that belongs to a "Team".
To create a team with 3 users:
Factory.define :team_with_three_users do |team|
team.after_create do |team_after_create|
3.times { Factory(:user, :team => team_after_create) }
end
end
To create records that share parameters
Write a helper method.Write a helper method. Suppose you have a User class and you want to randomly pick a team from among many teams.
# in test/factories.rb or spec/factories.rb
def teams
@teams ||= 3.times { Factory(:team) }
end
# Now your user factory can call the helper
Factory.define :user |user|
user.after_create do |user_after_create|
user_after_create.team = teams.sample
end
end
To connect cucumber steps for dynamic factories
Parse the cucumber step then send the match as a parameter: Given /^typical (\w+)/ do |name|
Factory(name)
end
Given a typical user. Given a typical team.
To do more advanced expert setup with callbacks
See this post about callbacks before and after factories:http://robots.thoughtbot.com/post/254496652/aint-no-calla-back-girl