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My Capybara note

n350071 profile image n350071🇯🇵 Updated on ・2 min read

Overview

Capybara is good for Rails E2E (Feature) testing. It simulates user actions on a browser, like find a button and click it, wait for the next page. You can choose Selenium Driver or others as web driver.

SetUp

Usage

🔨 prepare

👁 look around your site

inside of HTML

browser manipulation

✅ assert





# get current path
current_path

# spec/rails_helpers/feature_helper.rb
module FeatureHelpers
  def current_path_with_params
    uri = URI.parse(current_url)
    "#{uri.path}?#{uri.query}"
  end
end

📝 form

# input type=text
fill_in 'nav-search', with: 'n350071 capybara'

# select box
select 'Most Views', from: 'dashhboard_sort'

# submit
page.execute_script("$('form#your-form').submit()")

🧙‍♂️ Manipulate

# Change CSS/Style in Capybara
page.execute_script("$('selector').css('display','block')");

🎁 Opinion

  • We should use what users will see, instead of the source code of HTML.
  • The HTML is an essential factor to test.
    • We should align the HTML tag, CSS for testing. If it's different from a similar page, the testing is tough.
    • We should use the correct name in HTML to support easy testing.
  • Using find('label[for="model_attributes"]' is better than XPath, because this way is simulate the users way.

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