RSpec for Practical Rubyist

@ RubyConfTaiwan 2015

Transcript

1. RSPEC FOR THE PRACTICAL RUBYIST EXPLAINING SIMPLY AND QUICKLY ALL THE ELEMENTS OF CONTROLLER, MODEL, VIEW, HELPER, INTEGRATION, FEATURE WITHout ANSWERS TO PROBLEMS
2. 2015!!! RubyConFTW
3. rubytaiwan/taipei Things to know about Taipei put together by Ruby Taiwan Community Inspired from RubySG/Singapore
4. Juanito Fatas !
5. juanitofatas/fast-ruby Collection of Idioms, Benchmarks, etc. for Faster Ruby Code Inspired by @sferik and Ruby Community
6. Employee #1
7. The Birth of deppbot
8. JuanitoFatas/rubygems.org/pull/1
12. JOIN OPEN SOURCE
13. Tweet at Me @juanitofatas " #rubyconFTW #rubyconFTW2015
15. Introducing 4K Live Photos iPhone 6S Plus
16. muan/mojibar
17. Emoji is Awesome!
18. 95% of time preparations of this talk
19. Tweak fonts and think about emojis
20. First of all
21. It’s been a tough day
22. %
24. Some mathematics
25. My first talk ever, 5-minute long ⏳
26. My second talk, 50-minute long
27. Let ψ = 5
28. Let ω = 50
29. ω — ψ =
30. 50 — ψ =
31. 50 — 5 =
32. 50 — 5 =10
33. ∴
34. I am a 10x Speaker
35. Q.E.D.
36. Matz is Great! ,,,,,,
37. Talk Title Origin
38. Richard Feynman
40. RSPEC FOR THE PRACTICAL RUBYIST EXPLAINING SIMPLY AND QUICKLY ALL THE ELEMENTS OF CONTROLLER, MODEL, VIEW, HELPER, INTEGRATION, FEATURE WITHout ANSWERS TO PROBLEMS
41. Why This Talk
42. Rubyists in Taiwan are courageous.
44. Raise the awareness of Testing in Thiland
45. Journey into Rails Testing ⛵0
46. Introductory Talk No theory, and TDD because How-to, but not what & why Tutorial type
47. Just Enough Background
48. correctness quality buying time for the future finding regressions save repeated labor gives you confidence easy refactoring perfect bug report live documentation drive your implementation automation is win ✨
49. The Rabbit Hole
50. What is RSpec "
52. https://relishapp.com/rspec RSpec Core | RSpec Expectations | RSpec Mocks | RSpec Rails
53. RSpec Minitest vs
54. A professional developer should be able to work in either one of these because they essentially do the same thing: test your code. — Dr.Tenderlove “ http://tenderlovemaking.com/2015/01/23/my-experience-with-minitest-and-rspec.html
55. class Something < Minitest::Test def test_works assert_equal 11, 10 end def test_really_works assert_equal 11, 11 end end (Unit)Test
56. Test cases are Class Minitest::Test Tests are methods inside test case
57. describe "something" do it "works" do expect(11).to equal(10) end it "really works" do expect(11).to equal(11) end end Spec(ification)
58. Test cases are describe with description string / actual object and a block of tests Tests are it with description string and the body of test (block)
60. RSpec RAILS
61. A Gentle Introduction to RSpec
62. rspec rspec-core rspec-expectations rspec-mocks MetaRubyGem
63. How to run
64. . means Passed F means Failure E means Error * means Pending S means Skip
65. Sample Output
67. $ rspec --init
68. .rspec --color --require spec_helper https://relishapp.com/rspec/rspec-core/v/3-3/docs/command-line/
69. spec/ spec_helper.rb
70. Magic Spells
71. Computer science is a terrible name for this business. First of all, it's not a science. It might be engineering or it might be art, but we'll actually see that computer so-called science actually has a lot in common with magic.— Hal Abelson “ https://youtu.be/2Op3QLzMgSY?t=27s
72. describe it expect to
73. describe it expect to a series of tests
74. describe it expect to a series of tests is a test
75. describe it expect to a series of tests is a test an actual object
76. describe it expect to a series of tests is a test an actual object match something
77. describe how methods works, group of test examples, series of behaviour
78. describe User do ... end
79. RSpec.describe describe config.disable_monkey_patching! in spec_helper.rb 34QFD
    
80. RSpec.describe User do describe ".authenticate" do ... end describe "#name" do ... end end describe can be nested
81. RSpec.describe User do describe ".authenticate" do ... end describe "#name" do ... end end
82. RSpec.describe User do describe ".authenticate" do ... end describe "#name" do ... end end
83. RSpec.describe User do describe ".authenticate" do ... end describe "#name" do ... end end
84. RSpec.describe User do describe ".authenticate" do ... end describe "#name" do ... end end
85. RSpec.describe User do describe ".authenticate" do ... end describe "#name" do ... end end
86. context scenarios in your implementation same as describe
87. context "when…" do ... end context "with…" do end
88. it a single test example inside of describe / context block
89. it "eats something" do ... end
90. describe SteveJobs do context "with stylus" do it "yucks" do end end end
91. $ bin/rspec spec/models/steve_jobs_spec.rb --format doc SteveJobs with stylus yucks
92. it "hello" do … end 4JOHMF
    -JOF .VMUJ
    -JOF it { … }
93. example "" do ... end "WPJE specify "" do ... end
94. before things to do before test run
95. before { ... } it "" do ... end
96. before do ... end it "" do ... end
97. after things to do after test run
98. it "" do ... end after { ... }
99. it "" do ... end after do … end
100. inside of it
101. Expectations & matchers come in
102. expect(actual) expect something
103. to eq(expected) to equal what we expected
104. it "…" do expect(1+1).to eq(2) end from rspec-expectations
105. it "…" do expect(1+1).to eq(2) end matcher
106. expect(1+1).to eq(2)
107. 1+1 is 2? Let’s prove
108. 162 pages to prove 1+1=2
109. it "…" do expect(1+1).to eq(2) end Example instance http://git.io/vZfvX
110. it "…" do self.expect(1+1).to self.eq(2) end Example Example
111. it "…" do self.expect(1+1).to self.eq(2) end instance of ExpectationTarget http://git.io/vZffB
112. ET = ExpectationTarget class Example def self.expect(actual) ET.new(actual) end end
113. ET = ExpectationTarget class Example def self.expect(actual) ET.new(actual) end end
114. ET = ExpectationTarget class Example def self.expect(actual) ET.new(actual) end end
115. class ET attr_reader :actual def initialize(actual) @actual = actual end end
116. it "…" do self.expect(1+1).to self.eq(2) end Example
117. it "…" do self.expect(1+1).to self.eq(2) end Matcher
118. class Example def self.eq(expected) EqMatcher.new(expected) end end EqMatcher is actually BuiltIn::Eq http://git.io/vZffi
119. class EqMatcher def initialize(expected) @expected = expected end def matches ... end end
120. it "…" do self.expect(1+1).to self.eq(2) end instance of ExpectationTarget
121. it "…" do self.expect(1+1).to self.eq(2) end ExpectationTarget#to
122. class ExpectationTarget def to(matcher) Postive.handle_matcher(actual, matcher) end end
123. class ExpectationTarget def to(matcher) Postive.handle_matcher(actual, matcher) end end Postive is actually PositiveExpectationHandler http://git.io/vZfJK
124. class Positive def self.handle_matcher(actual, matcher) matcher.matches(actual) end end http://git.io/vZqoX
125. class Positive def self.handle_matcher(actual, matcher) matcher.matches(actual) end end
126. class EqMatcher def matches(actual) match(expected, actual) end private def match(expected, actual) actual == expected end end
127. class EqMatcher def matches(actual) match(expected, actual) end private def match(expected, actual) actual == expected end end
128. class EqMatcher def matches(actual) match(expected, actual) end private def match(expected, actual) actual == expected end end http://git.io/vZfUp
129. voilà, old sport!
130. it "…" do expect(user.admin?).to be_true end `be` matcher be_true be_false be_truthy be_falsy be_nil be
131. eq eql equal be be_* match be_within start_with end_with be_instance_of be_kind_of respond_to raise_error throw_symbol include match_array contain_exactly cover change satisfy output yield_* https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers "1*
132. expect { code }.to raise_error(error, message) expect { post :create } .to raise_error( ActiveRecord::RecordInvalid, "Validation failed: name can't be blank" ) raise_error matcher
133. expect { code }.to change { something }.by(value) def do_request post :create, user: params end expect { do_request }.to change { User.count }.by(1) change matcher
134. RSpec predicate expect(user.admin?).to be_true expect(user).to be_admin
135. Read in English Most of the time There is a matcher for it ( VJEF
136. Stick with eq as a Starting Point ( VJEF KISS
137. expect(user.admin?).to be_true expect(user.admin?).to eq true
138. RSpec built-in matchers have better error messages ( VJEF
139. let lazily-evaluated block to shared object between tests
140. describe Baz let(:foo) { "bar" } it "…" do ... end end foo will be available in it blocks under the same scope!
141. let(:foo) { sleep 42 } it "…" do ... end Finished in 0.04424 seconds it "…" do ... end
142. let(:foo) { sleep 42 } it "…" do foo end Finished in 42.03924 seconds it "…" do ... end
143. let!(:foo) { sleep 42 } it "…" do ... end Finished in 42.03924 seconds it "…" do ... end
144. Prefer let over @instance_var ( VJEF
145. RSpec Mocks
146. RSpec Mocks To mock a mocking bird
147. We are dealing with objects and objects
148. collaborators of each other
149. Sometimes it costs a lot to setup collaborators
150. TDD Tired-Driven Development
151. Move Fast and Break Things drive slow but stay safe
152. Double
154. A fake object for real object
155. RSpec::Mocks:: ExampleMethods #double http://git.io/vZq6F "1*
156. user = double("User")
157. Faking message and its return value
158. RSpec::Mocks:: ExampleMethods #allow http://git.io/vZq6F "1*
159. allow(obj).to receive(:msg).and_return(value)
160. user = double("User") allow(user).to receive(:admin?). and_return(true) allow(user).to receive(:admin?) { true }
161. user = double("User") allow(user).to receive(:admin?). and_return(true) allow(user).to receive(:admin?) { true }
162. user = double("User") allow(user).to receive(:admin?). and_return(true) allow(user).to receive(:admin?) { true }
163. user.admin? => true
164. user = double("User", admin?: true)
165. Stub & Mock
166. context "stub and mock" do describe "stub" do it "won't verify" do allow(User).to receive(:new) # User.new end end describe "mock" do it "will verify" do expect(User).to receive(:new) # User.new end end end
167. context "stub and mock" do describe "stub" do it "won't verify" do allow(User).to receive(:new) # User.new end end describe "mock" do it "will verify" do expect(User).to receive(:new) # User.new end end end Stub
168. context "stub and mock" do describe "stub" do it "won't verify" do allow(User).to receive(:new) # User.new end end describe "mock" do it "will verify" do expect(User).to receive(:new) # User.new end end end Mock
169. context "stub and mock" do describe "stub" do it "won't verify" do allow(User).to receive(:new) # User.new end end describe "mock" do it "will verify" do expect(User).to receive(:new) # User.new end end end Failure/Error: expect(User).to receive(:new) Mock
170. Mock will verify While Stub not
171. context "stub and mock" do describe "stub" do it "stub and verify" do allow(User).to receive(:new) User.new expect(User).to have_received(:new) end end end
172. context "stub and mock" do describe "stub" do it "won't verify" do allow(User).to receive(:new) User.new expect(User).to have_received(:new) end end end Strategy Spaces
173. Phases of Testing
174. setup exercise verify teardown everything we need the real work our expectations back to original state
175. Encrypt user password in database &YBN QMF
176. setup user = User.new(password: "passw0rd")
177. user.save exercise
178. expect(user.encrypted_password).to be_present verify
179. RSpec’ve got us covered teardown
180. before { user = User.new(password: "passw0rd") } it "should encrypt password" do user.save expect(user.encrypted_password).not_to eq nil end Put together
181. it "should encrypt password" do user = User.new(password: "passw0rd") user.save expect(user.encrypted_password).not_to eq nil end Strategy Spaces
182. Spy
183. Like 007, can do anything
184. Can respond to any messages
185. oo7 = spy oo7.can_jump? oo7.can_drive_car? oo7.can_play_poker? oo7.can_write_ruby?
186. spy is the Null Object of double spy = double.as_null_object
187. oo7 = spy oo7.hungry? expect(oo7).to have_received(:hungry?)
188. oo7 = spy oo7.tired? expect(oo7).to have_received(:tired?) Just like Stub!
189. RSpec 2 v.s RSpec 3 make stub and mock is confusing
190. But you can just try and explore their difference
191. That’s enough to write many tests!
192. RSpec & Rails
193. gem "rspec-rails" bundle rails generate rspec:install *OTUBMM in development and test group
194. spec/ rails_helper.rb Only when you need Rails
195. Try not to load rails_helper whenever possible 5JQ
196. config.infer_spec_type_from_file_location! # spec/models/user_spec.rb RSpec.describe User, type: :model do # automatically mixin functionalities end Infer type of test automatically
197. Metadata
198. RSpec.describe User, type: :model do end metadata
199. According to type of tests, RSpec will mixin different functionality automagically
200. RSpec.describe User, focus: true do end metadata $ rspec --tag focus only run spec with special tag
201. Rails & Testing
202. RAILS_ENV = test config/environments/test.rb
203. bin/rake db:test:prepare run pending migrations and load schema https://github.com/rails/rails/blob/v4.2.4/activerecord/lib/active_record/railties/databases.rake#L359-L364
204. ActiveSupport::TestCase ActionController::TestCase ActionMailer::TestCase ActionView::TestCase ActiveJob::TestCase ActionDispatch::IntegrationTest Read these API docs on http://api.rubyonrails.org/
205. Fixture
206. Fixture # spec/fixtures/users.yml juanitofatas: name: JuanitoFatas email: juanito@jollygoodcode.com # spec/rails_helper.rb RSpec.configure do |config| config.fixture_path = "#{::Rails.root}/spec/fixtures" config.use_transactional_fixtures = true end # under describe or context users :juanitofatas # => #<User:0x1234 name: "JuanitoFatas" email:"…">
207. FactoryGirl A DSL to generate objects
208. # spec/factories/user.rb Factory.define do factory :user do name "Juanito Fatas" email "juanito@jollygoodcode.com" end end
209. FactoryGirl.attributes_for(:user) # => { name: "JuanitoFatas", email: "juanito@jollygoodcode.com" }
210. # In spec FactoryGirl.create(:user) FactoryGirl.build(:user) # Map to Active Record User.create(…) User.new(…)
211. gem "factory_girl_rails" bundle mkdir spec/factories *OTUBMM in development and test group
212. spec/factories/*.rb $POWFOUJPO * is respective model name, user.rb
213. RSpec.configure do |config| config.include FactoryGirl::Syntax::Methods end $PO H create(:user) instead of FactoryGirl.create(:user) https://github.com/thoughtbot/factory_girl/blob/master/GETTING_STARTED.md
214. Minimum Valid Object 5JQ
215. Types of Test
216. https://robots.thoughtbot.com/rails-test-types-and-the-testing-pyramid
217. https://robots.thoughtbot.com/rails-test-types-and-the-testing-pyramid Bottom Top
218. https://robots.thoughtbot.com/rails-test-types-and-the-testing-pyramid Inside Outside
219. https://robots.thoughtbot.com/rails-test-types-and-the-testing-pyramid User Code
220. https://robots.thoughtbot.com/rails-test-types-and-the-testing-pyramid Coverage
221. https://robots.thoughtbot.com/rails-test-types-and-the-testing-pyramid Fast Slow
223. Feature Spec Outside-in, Acceptance / Customer Test, End-to-End, Top down
224. require "rails_helper" spec/features/*_spec.rb $POWFOUJPO
225. ( PBM Automate the manual repeated process Browser, check, refresh, repeat
226. Test like how user use it Use real database records Don’t mock or stub objects External Service can stub 5JQ
227. Happy Path for a given feature 5JQ
228. API to interact with Browser ( FN T capybara Version 2.4.0+ is recommended
229. group :development, :test do gem "capybara" end bundle install *OTUBMM
230. require "capybara/rails" # in spec/rails_helper.rb $PO H
231. database_rewinder ( FN T Ensure clean state across tests
232. group :test do gem "database_rewinder" end *OTUBMM
233. RSpec.configure do |config| config.before :suite do DatabaseRewinder.clean_all end config.after :each do DatabaseRewinder.clean end end $PO H
234. background feature scenario given "1*
235. &YBN QMF feature "Auth" do given { ... } background { ... } scenario "show name" do ... end end
236. background feature scenario given before describe it let http://git.io/vGyaV alias alias alias alias "1*
237. RSpec.feature "…" do end Capybara API will be available in here http://www.rubydoc.info/github/jnicklas/capybara/master#The_DSL
238. "1* page visit current_path click_on find fill_in choose check select attach_file https://github.com/jnicklas/capybara#the-dsl
239. 3BDL5FTU Fastest No JavaScript Can access within Rack No Server Required
240. &YBN QMF feature "Sign In" do scenario "works" do visit root_path click_on "Sign In" fill_in "login", with: "JuanitoFatas" fill_in "password", with: "1passw0rd" click_on "Sign In" end end
241. &YBN QMF feature "Auth" do scenario "show name" do create(:user, name: "Juan") sign_in_as(user) expect(page).to have_content("Juan") end end
242. &YBN QMF feature "Vote" do scenario "upvote" do create(:user, name: "Juan") sign_in_as(user) expect(page).to have_content("Votes 0") find("upvote").click expect(page).to have_content("Votes 1") end end
243. Drivers
244. % SJWFST Plain Firefox Webkit PhantomJS Rack-Test Selenium Capybara-webkit Poltergeist Single DSL to rule them all
245. RSpec.describe User, js: true do ... end enable javascript_driver #SPX TFS
246. 4FMFOJVN Selenium 2.0 Firefox JavaScript Can access Remote API EFGBVMU
247. $BQZCBSB8FCLJU Headless Testing JavaScript Faster than selenium
248. 1PMUFSHFJTU Headless Testing JavaScript Can Find JS Error No render engine needed
249. Capybara.default_driver Capybara.javascript_driver $PO H
250. Controller Spec Functional Test
251. require "rails_helper" spec/controllers/*_spec.rb describe "#action" $POWFOUJPO * is respective controller name
252. require "rails_helper" RSpec.describe ShopsController do describe "#index" do ... end describe "#new" do ... end describe "#create" do ... end … $POWFOUJPO
253. describe "#show" do ... end describe "#edit" do ... end describe "#update" do ... end describe "#destroy" do ... end end $POWFOUJPO
254. 5JQ Ordering should be the same as your actions in controller index new create show edit update destroy
255. response correct & success redirected right authentications session, flash, cookie render correct template instance variable ( PBM
256. params request response session flash cookie "1* get post patch put head delete ActionController::TestCase
257. expect(response).to render_template(:index) expect(response).to redirect_to(location) expect(response.status).to eq(200) expect(flash[:alert]).to eq I18n.t("failed") "1*
258. Can wrap request in method — abstractions 5JQ def do_request get :show, params end
259. RSpec.describe HomeController do describe "#index" do def do_request get :index end it "works" do do_request expect(response).to be_success end end end JOEFY
260. describe HomeController do describe "#index" do def do_request get :index end it "works" do do_request expect(response).to be_success end end end &YBN QMF same scope
261. RESTful controller spec
262. RSpec.describe ThingsController do end TLFMUPO
263. describe "#index" do def do_request get :index end before { do_request } it { expect(response).to be_success } end JOEFY
264. describe "#new" do def do_request get :new end before { do_request } it { expect(response).to be_success } end OFX
265. describe "#create" do def do_request post :create, thing: params end context "success" do ... end context "failure" do ... end end DSFBUF
266. describe "#show" do let(:thing) { create(:thing) } def do_request get :show, id: thing end before { do_request } it { expect(response).to be_success } end TIPX
267. FEJU describe "#edit" do let(:thing) { create(:thing) } def do_request get :edit, id: thing.id end before { do_request } it { expect(response).to be_success } end
268. describe "#update" do let(:thing) { create(:thing) } def do_request patch :update, id: thing.id, thing: params end before { do_request } context "success" do ... end context "failure" do ... end end VQEBUF
269. describe "#destroy" do let!(:thing) { create(:thing) } def do_request delete :destroy, id: thing.id end it "redirects" do expect { do_request }.to change(Thing, :count).by(-1) expect(response).to redirect_to things_path end end EFTUSPZ
270. 5JQ Try to keep the specs shape the same across controllers
271. 3BJMT
      post :show, { id: 1 }, { user_id: 1 }, { notice: "flash message" }
272. 3BJMT
      post :show, { id: 1 }, {}, { notice: "flash message" } params session flash
273. 3BJMT
      post :show, { shop_id: 1 }, {}, { notice: "flash message" } params session flash
274. 3BJMT
      post :show, params: { shop_id: 1 }, session: { user_id: 1 }, flash: { notice: "flash message" } Rails 5 Switch to Keyword Arguments https://github.com/rails/rails/pull/18323
275. 5JQ Wrap things in Objects, only test message has been invoked in controller skinny controller
276. describe "#create" do context "success" do it "sent welcome mail" do allow(UserMailer).to receive(:welcome) do_request expect(UserMailer).to have_received(:welcome) end end end &YBN QMF
277. describe "#create" do context "success" do it "sent welcome mail" do allow(Payment).to receive(:charge!) do_request expect(Payment).to have_received(:charge!) end end end
278. Model Spec
279. Test how you tried in rails console ( PBM
280. require "rails_helper" spec/models/*_spec.rb $POWFOUJPO
281. describe User do context "associations" do; end context "validations" do; end describe ".class_method" do; end describe "#instance_method" do; end end $POWFOUJPO
282. Use shoulda to write one-liner spec for associations and validations 5JQ
283. ActiveSupport::TestCase 3BJMT
284. describe User do context "associations" do it { expect(User.new).to have_many(:repos) } end end "TTPDJBUJPO
285. describe User do subject { User.new } context "associations" do it { expect(subject).to have_many(:repos) } end end &YBN QMF Implicit subject
286. describe User do context "associations" do it { is_expected.to have_many(:repos) } end end &YBN QMF
287. describe User do context "associations" do it { is_expected.to validate_presence_of :name } end end 7BMJEBUJPO
288. Post.trending scope :trending, -> { order("upvotes DESC") } describe Post do describe ".trending" do popular = create(:post, upvotes: 42) just_created = create(:post, upvotes: 1) trending_posts = Post.trending expect(trending_posts).to \ eq [popular, just_created] end end
289. Helper Spec
290. ( PBM Test the view helper as you expected
291. require "rails_helper" spec/helpers/*_spec.rb $POWFOUJPO
292. require "rails_helper" describe EventsHelper do describe "#linkify_event" do it "works" do expect(linkify_event).to eq "RubyKaigi 11st-13rd Dec, 2015" end end end &YBN QMF
293. require "rails_helper" describe EventsHelper do describe "#linkify_event" do it "works" do expect(linkify_event).to eq "RubyKaigi 11st-13rd Dec, 2015" end end end EventsHelper::LinkifyEvent
294. require "rails_helper" describe EventsHelper do describe "#linkify_event" do it "works" do self expect(linkify_event).to eq "RubyKaigi 11st-13rd Dec, 2015" end end end RSpec::ExampleGroups:: EventsHelper::LinkifyEvent
295. require "rails_helper" describe EventsHelper do describe "#linkify_event" do it "works" do expect(linkify_event).to eq "RubyKaigi 11st-13rd Dec, 2015" end end end
296. Mailer Spec
297. ActionMailer::TestCase ActionMailer::Base.deliveries ActionMailer::MessageDelivery 3BJMT
298. spec/mailers/*_spec.rb $POWFOUJPO
299. email_spec ( FN T Why this not in RSpec?
300. group :test do gem "email_spec" end *OTUBMM
301. # Either in spec/rails_helper.rb or # spec/email_helper.rb require "email_spec" RSpec.configure do |config| config.include EmailSpec::Helpers config.include EmailSpec::Matchers end $PO H
302. reply_to deliver_to deliver_from bcc_to cc_to "1* have_subject have_body_text have_header
303. Sent successfully Sent at correct time Sent to right person Email content ( PBM
304. class UserMailer < ActionMailer::Base def welcome_user(user) @user = user mail( to: @user.email, subject: "Welcome to JollyGoodCode!" ) end end &YBN QMF
305. RSpec.describe UserMailer do describe "#welcome_user" do let(:user) { build_stubbed(:user) } let(:email) { email_for(user) } def email_for(user) UserMailer.welcome_user(user) end it { expect(email).to have_subject "Welcome to JollyGoodCode!" } it { expect(email).to deliver_to user.email } end end &YBN QMF
306. Job Spec
307. Job invokes correct methods ( PBM
308. ActiveJob::TestCase ActiveJob::TestHelper 3BJMT
309. spec/jobs/*_spec.rb $POWFOUJPO
310. it "sync repos" do allow(RepoSync).to receive(:new) RepoSyncJob.perform_now(repo) expect(RepoSync).to have_received(:new) end &YBN QMF Sending right messages
311. it "sync repos" do allow(RepoSync).to receive(:new) RepoSyncJob.perform_now(repo) expect(RepoSync).to have_received(:new) end &YBN QMF Logic should be already tested in RepoSync specs
312. View Spec
313. Request Spec
314. Plain Old Ruby Object
315. Similar to Model Spec without loading Rails
316. Interact with the world
317. Run without network Avoid connectivity issues ( PBM
318. API limit Slower Test relies on internet Service no sandbox mode Service not exist 8 IZ
319. spec/**/*_spec.rb '3 &&% 0 . lib/github_client.rb spec/lib/github_client_spec.rb
320. webmock ( FN T Making real request IS A CRIME
321. group :test do gem "webmock" end *OTUBMM
322. require "webmock/rspec" WebMock.disable_net_connect! (allow_localhost: true) $PO H
323. stub_request( HTTP verb, path ).with( HEADER HASH ).to_return( RESPONSE HASH ) 4UVCCJOH
324. expect(WebMock).to have_requested(…). with(…) 4FUUJOH
     &YQFDUBUJPOT
325. expect( a_request(…) ).to have_been_made 4FUUJOH
     &YQFDUBUJPOT
326. VCR ( FN T Record response from real API or service cassettes
327. $ curl File.read Ruby Objects Faking responses
328. it "webmock example" do url = "https://api.github.com/users/juanitofatas" fixture = "spec/fixtures/github/juanitofatas.json" # stub_request(:get, url). to_return(body: File.read(fixture)) HTTP.get(url) expect(WebMock).to have_requested(:get, url) expect(a_request(:get, url)).to have_been_made end &YBN QMF
329. &YBN QMF
330. it "webmock example" do url = "https://api.github.com/users/juanitofatas" fixture = "spec/fixtures/github/juanitofatas.json" stub_request(:get, url). to_return(body: File.read(fixture)) HTTP.get(url) expect(WebMock).to have_requested(:get, url) expect(a_request(:get, url)).to have_been_made end &YBN QMF
331. it "webmock example" do url = "https://api.github.com/users/juanitofatas" fixture = "spec/fixtures/github/juanitofatas.json" stub_request(:get, url). to_return(body: File.read(fixture)) HTTP.get(url) expect(WebMock).to have_requested(:get, url) expect(a_request(:get, url)).to have_been_made end &YBN QMF
332. it "webmock example" do url = "https://api.github.com/users/juanitofatas" fixture = "spec/fixtures/github/juanitofatas.json" stub_request(:get, url). to_return(body: File.read(fixture)) HTTP.get(url) expect(WebMock).to have_requested(:get, url) expect(a_request(:get, url)).to have_been_made end &YBN QMF
333. it "webmock example" do url = "https://api.github.com/users/juanitofatas" fixture = "spec/fixtures/github/juanitofatas.json" stub_request(:get, url). to_return(body: File.read(fixture)) HTTP.get(url) expect(WebMock).to have_requested(:get, url) expect(a_request(:get, url)).to have_been_made end &YBN QMF
334. it "webmock example" do url = "https://api.github.com/users/juanitofatas" fixture = "spec/fixtures/github/juanitofatas.json" stub_request(:get, url). to_return(body: File.read(fixture)) HTTP.get(url) expect(WebMock).to have_requested(:get, url) expect(a_request(:get, url)).to have_been_made end &YBN QMF https://github.com/sferik/t
335. &YBN QMF many stub_request examples sferik/t
336. Debugging
337. stop spring pry-rails + binding.pry byebug everywhere p + puts + pp + raise
338. Closing
339. Routing, Request, View Specs Page Object (Feature Spec) Front-end Testing Infrastructure Testing A/B Testing Smoke Testing (example)
340. Routing Specs Request Specs View Specs Page Object (Feature Spec) Front-end Testing Infrastructure Testing A/B Testing Smoke Testing (example) NOT COVERED
341. LEGACY CODE
342. Skip Pending v.s. not run at all run but won’t failed
343. 1. Write Feature Spec 2. New things with specs 3. Use Exception monitoring service
344. 1. Write Feature Spec 2. New things with specs 3. Use Exception monitoring service 4. Find another job
345. DON’T TEST private Method test the method which uses it
346. Wrap Everything in objects so much easier to test
347. Use shoulda to simplify when you get tired.
348. Use tools to simplify when you get tired.
349. Don’t aim for 100% test coverage
350. I get paid for code that works, so my philosophy is to test as little as possible to reach a given level of confidence.— Kent Back “
351. We read more than we write
352. Anything that can go wrong, will go wrong
353. That’s why we write tests
354. Tests are also code. Will become stinky, break up when it’s time
355. There are million ways of how things are tested
356. There’s no tomorrow.
357. WRITE TEST NOW
358. A test is better than no test
359. Feature Model Controller
360. Do Code Review
361. Team Style Guide
362. Takeaways
363. ALWAYS BE TESTING
364. Resource
365. Talks
366. https://www.youtube.com/watch?v=MA4jJNUG_dI
367. http://git.io/vsOKE
368. https://www.youtube.com/watch?v=Libc0-0TRg4
369. Books
371. https://leanpub.com/rspecbook RUBYCONFTW2015 ⯜顤 8 PSL
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     1SPHSFTT IPROMISEYOUIWILLWRITETESTS ! ✿䫓 ! 45RGE⑆桡⻇㔑 D[,WCPKVQ(CVCU
372. Talk to me! I’m happy to help you
373. 6JCPM[QW HQT.KUVGPKPI
374. 6GC6KOG ☕