RSpec2 & Rails3，测试助手的基础知识问题

Question

这当然是微不足道的，但无法弄清楚出了什么问题。

帮助程序：app/helpers/bookings_helper.rb

module BookingsHelper
  def booking_price(booking)
    "something"
  end
end

帮助程序规范：spec/helpers/bookings_helper_spec.rb

require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

describe BookingsHelper do
  describe "#booking_price" do
    helper.booking_price.should == 'something'
  end
end

错误

/Library/Ruby/Gems/1.8/gems/activesupport-3.0.4/lib/active_support/whiny_nil.rb:48:in `method_missing': undefined method `booking_price' for nil:NilClass (NoMethodError)

Answer 1

尝试使用它而不是对内部块进行描述：

describe BookingsHelper do
  it "#booking_price" do
    helper.booking_price.should == 'something'
  end
end