Functional testing with capybara

Functional testing with capybara, shown by examples from the metaflop project.

1. capybara
3. overview automated user interaction automatically waits for asynchronous tasks driver agnostic high level access to ui elements
4. test frameworks cucumber rspec test::unit minitest::spec
5. drivers
6. rack_test default fast, no server no js mechanize rack_test with remote server
7. selenium 2.0 aka webdriver firefox, chrome, ie, ...
8. webkit headless QtWebKitk logging / messages screenshots cookies resizing the window
9. poltergeist headless phantomjs screenshots resizing the window remote debugging (web inspector) no X (CI integration)
10. dsl
11. navigating visit('/projects') visit(post_comments_path(post))
12. clicking links and buttons click_link('id-of-link') click_link('Link Text') click_button('Save') click_on('Link Text') # links or buttons
13. interacting with forms fill_in('Username', :with => 'user') choose('A Radio Button') check('A Checkbox') attach_file('Image', '/path/to/image.jpg') select('Option', :from => 'Select Box')
14. querying (rspec matchers) page.should have_selector('table tr') page.should have_selector( :xpath, '//table/tr') page.should have_xpath('//table/tr') page.should have_css('table tr.foo') page.should have_content('foo')
15. finding find_field('First Name').value find_link('Hello').visible? find_button('Send').click find("#overlay").find("h1").click all('a').each { |a| a[:href] }
16. scoping within("li#employee") do fill_in 'Name', :with => 'Jimmy' end
17. scripting page.execute_script("$('body').empty()") result = page.evaluate_script('4 + 4');
18. debugging save_and_open_page # snapshot print page.html
19. setup
20. Capybara.default_driver = :selenium # sinatra Capybara.app = App # remote app Capybara.app_host = 'http://www.google.com'
21. per spec Capybara.javascript_driver = :selenium # ... describe 'requires js', :js => true do it 'will use the default js driver' it 'will switch to one specific driver', :driver => :webkit end
22. set browser Capybara.register_driver :selenium do |app| Capybara::Selenium::Driver.new( app, :browser => :chrome ) end
23. in the wild
24. metaflop web based platform for metafonts and related type projects modulator experimental font generation export as otf, webfont
25. spec sample 1 context 'when i change the unit width' do it 'should show the loading indicator' do fill_in 'param-unit-width', :with => 2 page.should have_selector( '.preview-loading-text') end end
26. spec sample 2 context 'when i enable anatomy' do it 'shows the anatomy image' do within '#menu' do click_link 'on' end page.should have_selector '#info-panel' end end
27. spec sample 3 context 'when i click the "webfont" link' do it 'should call the font generator url' do click_link('webfont') current_url.should include 'modulator/export/font/web' end end
28. problems
29. general dialogs (downloads) new openend windows driver specialties
30. selenium slow, startup slow, random errors no http response no .trigger() (e.g. mouse over) installation
31. solution avoid selenium use headless test visual concerns manually
32. links capybara homepage webkit poltergeist selenium chrome driver metaflop
33. @alexisreigel koffeinfrei koffeinfrei.org