Configure RSpec to crash on any JS errors or warnings

rails_helper.rb

# Inspired by https://medium.com/@coorasse/catch-javascript-errors-in-your-system-tests-89c2fe6773b1

IGNORED_BROWSER_LOGS = [
  'You may test your Stripe.js integration over HTTP. However, live Stripe.js integrations must use HTTPS.',
].freeze

RSpec.configure do |config|
  config.after :each, js: true do
    errors = page.driver.browser.manage.logs.get(:browser)
    next if errors.blank?

    aggregate_failures 'Browser Errors' do
      errors.each do |error|
        next unless %w[WARNING SEVERE].include?(error.level)
        next if IGNORED_BROWSER_LOGS.any? { |msg| error.message.include?(msg) }

        flunk "[Browser Logs] #{error.level}: #{error.message}"
      end
    end
  end
end