将此帮助文件放入spec / support /

put this helper file in spec/support/

和这一行spec_helper.rb

and this line spec_helper.rb

  # Requires supporting ruby files with custom matchers and macros, etc,
  # in spec/support/ and its subdirectories.
  Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }