与未定义的变量

Question

Rspec的测试复杂的代码只需要与RSpec的测试帮助小有一点有点...很新，它和不完全知道如何测试这段代码

# Get a list of tasks recently used by the user 
    recent_task_ids = Effort.all(:select => "project_task_id", 
            :conditions => { :user_id => @user_id }, 
            :group => "project_task_id", 
            :order => "MAX(week_commencing)") 


    # For each of the task ids, get the actual project task records 
    @recent_tasks = [] 
    recent_task_ids.each do |effort| 
     if ProjectTask.find_by_id(effort.project_task_id) != nil 
     @recent_tasks.push(ProjectTask.find(effort.project_task_id)) 
     end 
    end 

如果你甚至应该不知道以这种方式测试未定义的变量，但任何帮助将是伟大的

Answer 1

您可以将Effort.all方法存根。

it "tests with nil values" do 
    Effort.stub(:all).and_return(nil) 
end 

来源：http://rspec.info/documentation/mocks/stubs.html和http://rspec.info/documentation/mocks/