pokemon.trade/spec/capybara_helper.rb

require 'capybara/rspec'
require 'selenium/webdriver'

Capybara.default_max_wait_time = 10
Capybara.server = :puma, {Silent: true}

# Check if Capybara should be running against a remote Selenium instance
def remote_selenium?
  (ENV['SELENIUM_FIREFOX_HOST'] || ENV['SELENIUM_CHROME_HOST']) && ENV['SELENIUM_PORT']
end

# Condtionally swap driver setup, defaults to `:headless_firefox`
def selenium_driver
  return @selenium_driver if @selenium_driver

  selenium_driver = []
  if remote_selenium?
    selenium_driver.push('remote')
  elsif ENV['CAPYBARA_GUI_DRIVER'] != 'true'
    selenium_driver.push('headless')
  end

  case ENV['CAPYBARA_JS_DRIVER']
  when 'chrome'
    selenium_driver.push('chrome')
  when 'firefox'
    selenium_driver.push('firefox')
  else
    selenium_driver.push('firefox')
  end

  @selenium_driver = selenium_driver.join('_').to_sym
end

# Setting app_host and default_host here have no bearing on test runners.
# These must be set in a `before` block for each test, i.e. in rails_helper.rb
# Capybara.app_host = "http://#{ip}:#{app_host_port}"
# Capybara.default_host = "http://#{ip}:#{app_host_port}"

Capybara.server_port = ENV['APP_HOST_PORT'] if ENV['APP_HOST_PORT']
Capybara.server_host = '0.0.0.0' if remote_selenium?

# Headless firefox and chrome configuration. Useful for CI matrices.
# See https://gist.github.com/bbonamin/4b01be9ed5dd1bdaf909462ff4fdca95
Capybara.register_driver :firefox do |app|
  Capybara::Selenium::Driver.new(app, browser: :firefox)
end

Capybara.register_driver :headless_firefox do |app|
  options = Selenium::WebDriver::Firefox::Options.new
  options.headless! # added on https://github.com/SeleniumHQ/selenium/pull/4762

  Capybara::Selenium::Driver.new(app, browser: :firefox, options: options)
end

options = Selenium::WebDriver::Chrome::Options.new
options.add_preference(:download, prompt_for_download: false,
                                  default_directory: '/tmp/downloads')
options.add_preference(:browser, set_download_behavior: {behavior: 'allow'})

Capybara.register_driver :chrome do |app|
  Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)
end

Capybara.register_driver :headless_chrome do |app|
  options.add_argument('--headless')
  options.add_argument('--disable-gpu')
  options.add_argument('--window-size=1280,800')

  driver = Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)

  ### Allow file downloads in Google Chrome when headless!!!
  ### https://bugs.chromium.org/p/chromium/issues/detail?id=696481#c89
  bridge = driver.browser.send(:bridge)

  path = '/session/:session_id/chromium/send_command'
  path[':session_id'] = bridge.session_id

  bridge.http.call(:post, path, cmd: 'Page.setDownloadBehavior',
                                params: {
                                  behavior: 'allow',
                                  downloadPath: '/tmp/downloads',
                                })
  ###

  driver
end

Capybara.register_driver :remote_firefox do |app|
  Capybara::Selenium::Driver.new(
    app,
    browser: :remote,
    url: "http://#{ENV['SELENIUM_FIREFOX_HOST']}:#{ENV['SELENIUM_PORT']}/wd/hub",
    desired_capabilities: Selenium::WebDriver::Remote::Capabilities.firefox,
  )
end

Capybara.register_driver :remote_chrome do |app|
  args = ['--no-default-browser-check', '--start-maximized']
  caps = Selenium::WebDriver::Remote::Capabilities.chrome('chromeOptions' => {'args' => args})

  Capybara::Selenium::Driver.new(
    app,
    browser: :remote,
    url: "http://#{ENV['SELENIUM_CHROME_HOST']}:#{ENV['SELENIUM_PORT']}/wd/hub",
    desired_capabilities: caps,
  )
end