Capybara Initializers

capybara_initializer_rails_4.rb

class CapybaraInitializer

  attr_accessor :headless, :context
  alias :headless? :headless

  def initialize
    @headless = true
  end

  def call
    # Common Capybara configuration
    Capybara.default_max_wait_time = 5

    # Add some Capybara config if we are running
    # Chrome on the docker host machine.
    if !headless? && docker?
      Capybara.server_host = '0.0.0.0'
      Capybara.server_port = '43447'
    end

    # Register the driver
    Capybara.register_driver(:headless_chrome) { |app| driver(app) }
    Capybara.javascript_driver = :headless_chrome
  end

  def self.configure
    initializer = new
    yield initializer if block_given?
    initializer.call
  end

  private

  def driver(app)
    Capybara::Selenium::Driver.new(app, driver_options)
  end

  def driver_options
    { browser: :chrome, desired_capabilities: capabilities }.tap do |a|
      a[:url] = 'http://host.docker.internal:9515/' if !headless? && docker?
    end
  end

  def capabilities
    Selenium::WebDriver::Remote::Capabilities.chrome(
      'chromeOptions' => {
        'args' => chrome_options
      }
    )
  end

  def chrome_options
    %w(no-sandbox disable-gpu window-size=1440,900).tap do |a|
      a << 'headless' if headless?
    end
  end

  def docker?
    context == :docker
  end
end

capybara_initializer_rails_5.rb

# frozen_string_literal: true

RSpec.configure do |config|
  headless = ENV.fetch('HEADLESS', true) != 'false'

  config.before(:each, type: :system) do
    driven_by :rack_test
  end

  config.before :each, type: :system, js: true do
    # Docker environment
    url = if headless
            "http://#{ENV['SELENIUM_REMOTE_HOST']}:4444/wd/hub"
          else
            'http://host.docker.internal:9515'
          end

    driven_by :selenium, using: :chrome, options: {
      browser:              :remote,
      url:                  url,
      desired_capabilities: :chrome
    }

    Capybara.server = :puma, { Silent: true }

    # Find Docker IP address
    Capybara.server_host = if headless
                             `/sbin/ip route|awk '/scope/ { print $9 }'`.strip
                           else
                             '0.0.0.0'
                           end
    Capybara.server_port = '43447'
    Capybara.app_host    = "http://#{Capybara.current_session.server.host}:#{Capybara.current_session.server.port}"
  end

  config.after :each, type: :system, js: true do
    page.driver.browser.manage.logs.get(:browser).each do |log|
      case log.message
        when /This page includes a password or credit card input in a non-secure context/
          # Ignore this warning in tests
          next
        else
          message = "[#{log.level}] #{log.message}"
          raise message
      end
    end
  end
end