ruby - 使用 Rspec 在单元测试中测试 "accepts_nested_attributes_for"

Question

我是 Rails 和测试模型的新手。我的模型类是这样的:

class Tester < Person
  has_one :company
  accepts_nested_attributes_for :skill   
end

而且我想在不使用任何其他 gem 的情况下使用 rspec 对“accepts_nested_attributes_for :skill”进行测试。我怎样才能做到这一点？

Answer 1

有方便的 shoulda gem 匹配器用于测试 accepts_nested_attributes_for，但您提到您不想使用其他 gem。因此，仅使用 Rspec，想法是设置包含所需 Tester 属性的 attributes 散列和包含所需 skill_attributes 的嵌套散列 技能属性；然后传入Tester的create方法，看是否改变了Testers的数量和Skills的数量.类似的东西:

class Tester < Person
  has_one :company
  accepts_nested_attributes_for :skill
  # lets say tester only has name required;
  # don't forget to  add :skill to attr_accessible
  attr_accessible :name, :skill
  .......................
 end

你的测试:

 # spec/models/tester_spec.rb
 ......
 describe "creating Tester with valid attributes and nested Skill attributes" do
   before(:each) do
     # let's say skill has languages and experience attributes required
     # you can also get attributes differently, e.g. factory
     @attrs = {name: "Tester Testov", skill_attributes: {languages: "Ruby, Python", experience: "3 years"}}
   end

   it "should change the number of Testers by 1" do
      lambda do
        Tester.create(@attrs)
      end.should change(Tester, :count).by(1)
   end

   it "should change the number of Skills by 1" do
      lambda do
        Tester.create(@attrs)
      end.should change(Skills, :count).by(1)
   end
 end

哈希语法可能不同。此外，如果您有任何唯一性验证，请确保在每次测试之前动态生成 @attrs 哈希。干杯，伙计。