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Functional testing with capybara
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koffeinfrei
August 22, 2012
Programming
3
210
Functional testing with capybara
Functional testing with capybara, shown by examples from the metaflop project.
koffeinfrei
August 22, 2012
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Transcript
capybara
None
overview automated user interaction automatically waits for asynchronous tasks driver
agnostic high level access to ui elements
test frameworks cucumber rspec test::unit minitest::spec
drivers
rack_test default fast, no server no js mechanize rack_test with
remote server
selenium 2.0 aka webdriver firefox, chrome, ie, ...
webkit headless QtWebKitk logging / messages screenshots cookies resizing the
window
poltergeist headless phantomjs screenshots resizing the window remote debugging (web
inspector) no X (CI integration)
dsl
navigating visit('/projects') visit(post_comments_path(post))
clicking links and buttons click_link('id-of-link') click_link('Link Text') click_button('Save') click_on('Link Text')
# links or buttons
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')
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')
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]
}
scoping within("li#employee") do fill_in 'Name', :with => 'Jimmy' end
scripting page.execute_script("$('body').empty()") result = page.evaluate_script('4 + 4');
debugging save_and_open_page # snapshot print page.html
setup
Capybara.default_driver = :selenium # sinatra Capybara.app = App # remote
app Capybara.app_host = 'http://www.google.com'
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
set browser Capybara.register_driver :selenium do |app| Capybara::Selenium::Driver.new( app, :browser =>
:chrome ) end
in the wild
metaflop web based platform for metafonts and related type projects
modulator experimental font generation export as otf, webfont
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
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
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
problems
general dialogs (downloads) new openend windows driver specialties
selenium slow, startup slow, random errors no http response no
.trigger() (e.g. mouse over) installation
solution avoid selenium use headless test visual concerns manually
links capybara homepage webkit poltergeist selenium chrome driver metaflop
@alexisreigel koffeinfrei koffeinfrei.org