使用Rspec和Factory Girl测试before_save回调

Question

我很确定我错过了一些非常基本的东西.

我想测试before_save回调是否完成它应该做的事情,而不仅仅是它被调用.

我写了以下测试:

it 'should add lecture to question_type' do      
  @course = Factory :course,
                    :start_time => Time.now - 1.hour,
                    :end_time => Time.now                        
  @question = Factory.create(:question, 
                             :course_id => @course.id, 
                             :created_at => Time.now - 10.minutes)                          
  @question.question_type.should == 'lecture'      
end

我有以下工厂course和question:

Factory.define :course do |c|
  c.dept_code {"HIST"}
  c.course_code { Factory.next(:course_code) }
  c.start_time { Time.now - 1.hour }
  c.end_time { Time.now }
  c.lecture_days { ["Monday", Time.now.strftime('%A'), "Friday"]  }
end

Factory.define :question do |q|
  q.content {"Why don't I understand this class!?"}
  q.association :course
end

我在我的Question模型中写了以下回调:

before_save :add_type_to_question

protected

def add_type_to_question
  @course = Course.find(self.course_id)
  now     = Time.now
  if (time_now > lecture_start_time && time_now < lecture_end_time ) && @course.lecture_days.map{|d| d.to_i}.include?(Time.now.wday)
    self.question_type = "lecture"
  end    
end

对于question_type而不是'讲座',测试仍然失败说"得到:nil"

由于我没有看到任何明显错误的实现代码,我在开发环境中尝试了回调,它实际上有助于将"讲座"添加到question_type.

这让我觉得我的测试可能有问题.我在这里错过了什么？是否Factory.create默认跳过回调？

Answer 1

我不会Factory.create用来触发这个过程.FactoryGirl应该用于创建测试设置,而不是触发您要测试的实际代码.您的测试将如下所示:

it 'should add lecture to question_type' do      
  course = Factory(:course, :start_time => Time.now - 1.hour, :end_time => Time.now)
  question = Factory.build(:question, :course_id => course.id, :created_at => Time.now - 10.minutes, :question_type => nil)

  question.save!                          
  question.reload.question_type.should == 'lecture'      
end

如果此测试仍然失败,您可以开始调试:

在语句中添加puts语句,在语句中添加add_type_to_question另一个if语句,看看会发生什么.