RSpec：需要帮助播种/理解请求规格和要求帮手

Question

我试图理解 RSpec 的请求规范，据我所知，RSpec 相当于集成测试。我似乎无法使用 Race 实例正确播种它。看起来 start_date 和 end_date 是 nil 而不是实际日期，因此与 Date.today< 进行比较时它们会失败/code> (self.start_date <= Date.today && self.end_date >= Date.today)。

这是我无法通过的基本问题：

require 'spec_helper'
describe "Races" do
  describe "GET /races" do
    it "should display page" do
      Race.create!(:name => "Race Name", :start_date => Date.yesterday, :end_date => Date.tomorrow, :homepage => "http://website.com")
      get races_path
      response.status.should be(200)
      response.should render_template(:index)
    end
  end
end

此操作失败并出现以下错误：

Failure/Error: get races_path
     ActionView::Template::Error:
       undefined method `<=' for nil:NilClass
     # ./app/models/race.rb:5:in `current?'
     # ./app/helpers/races_helper.rb:12:in `formatted_race_dates'

app/models/race.rb：

class Race < ActiveRecord::Base
  def current?
    self.start_date <= Date.today && self.end_date >= Date.today
  end
end

app/helpers/races_helper.rb：

module RacesHelper
  def formatted_race_dates(race)
    link_to(race.homepage, :id => race.current? ? 'live-race' : nil) do
        raw("<strong>#{race.name}</strong> <em>#{race_dates_string(race)}</em>")
    end
  end
end