Defining download directory for chrome system specs

rails_helper.rb

# ...
RSpec.configure do |config|
  # ...
  config.before(:each, type: :system, js: true) do
    desired_capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
      'chromeOptions' => {
        'prefs' => {
          'download.default_directory' => Rails.root.join('spec/downloads'),
          'download.prompt_for_download' => false,
          'plugins.plugins_disabled' => ["Chrome PDF Viewer"]
        }
      }
    )
    driven_by :selenium, using: :chrome, options: { desired_capabilities: desired_capabilities }
  end
  # ...
end