0

我正在努力在我的单元测试中涵盖我模型的所有方法、关联和验证，到目前为止一切都很好。我订阅了 TreeHouse 并观看了Ruby Foundations -虔诚地测试。

我昨晚在为我的 Provider.rb 模型测试方法时偶然发现了这个错误：

class Provider < ActiveRecord::Base

  attr_accessible :description, :name
  validates :name, :presence => true
  validates :description, :presence => true
  validates :name, :length => { :minimum => 6, :maximum => 100 }
  validates :description, :length => { :minimum => 6, :maximum => 100 }
  has_many :courses
  resourcify

  def unique_locations
    Location.joins(sessions: :course).where(courses: { provider_id: self.id }).uniq.pluck('locations.name')
  end

end

我对 unique_locations 方法的单元测试如下：

  test 'should return a list of unique locations' do
    provider = FactoryGirl.build(:provider)
    assert_equal provider.unique_locations, ["location_1", "location_2"]
  end

运行测试后出现以下错误：

<[]> expected but was
<["location_1", "location_2"]>.

我的工厂很简单：

FactoryGirl.define do
  factory :course do
    name 'Snowboard 101'
    description 'Snowboard course'
    association :provider, factory: :provider
  end
end

FactoryGirl.define do
  factory :provider do
    name 'The School of Hard Knocks'
    description 'School description'
  end
end

FactoryGirl.define do
  factory :session_snowboard, class: Session do
    name 'Winter Session'
    description 'Snowboarding 101'
    price 200
    class_size 4
    association :course, factory: :course
    association :location, factory: :location_1
  end

  factory :session_ski, class: Session do
    name 'skiing 101'
    description 'Start in november'
    price 100
    class_size 4
    association :course, factory: :course
    association :location, factory: :location_2
  end

end

FactoryGirl.define do
  factory :location_1 do
    name 'location_1'
  end

  factory :location_2 do
    name 'location_2'
  end

end

我的 unique_locations 方法在我不同的环境中运行良好。我只是不明白为什么它没有返回测试中的唯一位置列表。

任何想法？

谢谢，弗朗西斯

4

2 回答 2

0

您正在调用FactoryGirl.build(:provider)它只构建而不保存到数据库，所以 unique_locations 显然没有 id 可以通过。使用create它应该没问题。

于 2013-04-11T16:29:42.413 回答
0

因此，在对 Factory_Girl 进行了很多探索之后，我找到了解决方案：

这是我的工厂：

FactoryGirl.define do
  factory :provider do
    name 'McGill University'
    description 'McGill is one of the best universities in the world.'
    after(:create) {|provider| create_list(:course, 2, provider: provider) }
  end
end

FactoryGirl.define do
  factory :course do
    name 'Snowboard 101'
    description 'Snowboard course'
    provider
    after(:create) {|course| create_list(:session, 2, course: course) }
  end
end

FactoryGirl.define do
  factory :session do
    name 'Winter Session'
    description 'Snowboarding 101'
    price 150
    class_size 4
    course
    location
  end
end

FactoryGirl.define do
  factory :location do |l|
    l.sequence(:name) { |n| "location_#{n}"}
  end
end

我还更新了我的测试：

  test 'should return a list of unique locations' do
    provider = create(:provider)
    assert_equal provider.unique_locations, %w[location_1 location_2 location_3 location_4]
  end

这成功地创建了 4 个不同的位置。

于 2013-04-12T19:32:02.227 回答