Factory Girl - Gabe Evans

Transcript

1. Factory Girl A Brief Introduction Using Ruby on Rails
2. What’s Factory Girl?
3. A Replacement for Fixtures
4. Provides a Simple DSL
5. Keeps Tests Focused & Readable
6. Builds Objects Instead of Database Records
7. Installation
8. Gemfile
9. group :development, :test do gem ‘factory_girl_rails’ end Gemfile
10. $ bundle install
11. Defining a Factory
12. spec/factories/
13. spec/factories/users.rb
14. spec/factories/posts.rb
15. spec/factories/comments.rb
16. spec/factories/products.rb
17. spec/factories/users.rb
18. FactoryGirl.define do factory :user do name ‘Joe Blow’ email ‘joe.blow@gmail.com’ password ‘p@ssw0rd’ admin false end end spec/factories/users.rb
19. spec/models/user_spec.rb
20. describe User do end spec/models/user_spec.rb
21. describe User do subject { FactoryGirl.create(:user) } end spec/models/user_spec.rb
22. describe User do subject { FactoryGirl.create(:user) } its(:name) { should == ‘Joe Blow’ } end spec/models/user_spec.rb
23. describe User do subject { FactoryGirl.create(:user) } its(:name) { should == ‘Joe Blow’ } its(:email) { should == ‘joe.blow@gmail.com’ } end spec/models/user_spec.rb
24. describe User do subject { FactoryGirl.create(:user) } its(:name) { should == ‘Joe Blow’ } its(:email) { should == ‘joe.blow@gmail.com’ } it { should_not be_admin } end spec/models/user_spec.rb
25. FactoryGirl.create(:user)
26. FactoryGirl.build(:user)
27. FactoryGirl.build_stubbed(:user)
28. spec/spec_helper.rb
29. RSpec.configure do |config| config.include FactoryGirl::Syntax::Methods end spec/spec_helper.rb
30. FactoryGirl.create(:user)
31. create(:user)
32. build(:user)
33. build_stubbed(:user)
34. spec/models/user_spec.rb describe User do subject { create(:user) } its(:name) { should == ‘Joe Blow’ } its(:email) { should == ‘joe.blow@gmail.com’ } it { should_not be_admin } end
35. Overriding Attributes
36. spec/models/user_spec.rb context ‘a duplicate email address’ do it { should_not be_valid } end
37. context ‘a duplicate email address’ do let(:user) { create(:user) } subject { User.new(name: ‘Joe Duplicate’, email: user.email, password: ‘test123’) } it { should_not be_valid } end spec/models/user_spec.rb
38. context ‘a duplicate email address’ do let(:user) { create(:user) } subject { build(:user, email: user.email) } it { should_not be_valid } end spec/models/user_spec.rb
39. Lazy Attributes
40. spec/factories/posts.rb FactoryGirl.define do factory :post do title ‘Worst presentation EVER!’ content “Gabe’s presentations are long-winded. After the first 40 slides I passed out.” published_at { Time.now } end end
41. Sequences
42. FactoryGirl.define do sequence :email do |n| “person#{n}@example.com” end end spec/factories/sequences.rb
43. Traits
44. Associations
45. Dependent Attributes
46. Transient Attributes
47. Creating or Building Multiple Objects
48. Callbacks
49. A Real World Scenario
50. Wrapping Up...
51. Questions?
52. *applause*