测试:在anaf中的reject_if

Question

我有一个用户模型

class User < ActiveRecord::Base
  has_many :languages, :dependent => :destroy
  accepts_nested_attributes_for :languages,   :reject_if => lambda { |l| l[:name].blank? }
end

我想用RSpec 2.0.0测试reject_if部分.目前我有两个简单的测试用例

  it "should not save language without name by accepts_nested_attributes" do
    lambda {
      @user.update_attributes!("languages_attributes"=>{"0"=>{}})
    }.should_not change(Language, :count)
  end

  it "should save language with name by accepts_nested_attributes" do
    lambda {
      @user.update_attributes!("languages_attributes"=>{"0"=>{"name"=>"lang_name"}})
    }.should change(Language, :count).by(1)
  end

但是我对测试很新,看起来很奇怪.我想知道这是否是测试reject_if的正确方法？有没有更好的方法呢？

Answer 1

我看到你正在测试reject_if当时最好的方法就是直接测试它:

anaf_for_languages = User.nested_attributes_options[:languages]
anaf_for_languages[:reject_if].call({ "name" => "" }).should be_true

如果是的话true,那name就是空白.我认为这比你的代码更简洁,但不是那么明显.