Rspec 和 Factory Girl 不合作

Question

我有点想把头发拉出来。我正在尝试使用 rspec 和 Factory Girl（Ubuntu 13.10 和 Rails 4）进行测试。似乎 Rspec 没有看到任何 Factory Girl 的东西。这是我的 spec_helper.rb：

    # This file is copied to spec/ when you run 'rails generate rspec:install'
    ENV["RAILS_ENV"] ||= 'test'
     require File.expand_path("../../config/environment", __FILE__)
     require 'factory_girl_rails'
     require 'rspec/rails'
     require 'rspec/autorun'
     require 'capybara/rspec'

     Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }

     ActiveRecord::Migration.check_pending! if defined?(ActiveRecord::Migration)

     RSpec.configure do |config|
       config.include FactoryGirl::Syntax::Methods

       config.use_transactional_fixtures = true

       config.infer_base_class_for_anonymous_controllers = false

       config.order = "random"
         config.color_enabled = true

         config.tty = true

         config.formatter = :documentation # :progress, :html, :textmate
     end

factories.rb:

    FactoryGirl.define do
      factory :exercise do
        name 'New Exercise'
        time 3
        reps 7
        weight 12
        weight_unit 'kg'
        factory :aerobic_exercise do
         name 'Jumping Jacks'
          kind 'Cardio/Aerobic'
        end
        factory :bodyweight_exercise do
          name 'Pushups'
          kind 'Bodyweight'
        end
        factory :cardio_exercise do
          name 'Jumping Jacks'
          kind 'Cardio/Aerobic'
        end
        factory :lifting_exercise do
          name 'BB Shoulder Presses'
          kind 'Weight Lifting'
        end
      end
    end

还有我失败的规范：

    #require 'test/spec'
    require 'spec_helper'

    describe Exercise do
      describe 'Exercise properly normalizes values' do
        it 'has weight and weight unit if kind is Weight Lifting' do
          let(:exercise) { FactoryGirl.create(:lifting_exercise) }
         exercise.should be_weight
          exercise.time.should be_nil
        end
        it 'has time but not weight etc. if kind is Cardio' do
          let(:exercise) { FactoryGirl.create(:aerobic_exercise) }
          exercise.should be_time
          exercise.reps.should be_nil
        end
      end
    end

当我运行 rspec 我得到这个错误：

         Failure/Error: let(:exercise) { FactoryGirl.create(:lifting_exercise) }
  NoMethodError:
    undefined method `let' for #    <RSpec::Core::ExampleGroup::Nested_1::Nested_1:0x007f2f013b3760>

帮助！（请）

Answer 1

您的问题不是 RSpec 和 FactoryGirl 不能很好地配合使用。

let 不属于示例的方法组。请注意，let 位于 it 块内。这应该工作

#require 'test/spec'
require 'spec_helper'

describe Exercise do

  describe 'Exercise properly normalizes values' do

    context 'with a lifting exercise' do
      let(:exercise) { FactoryGirl.create(:lifting_exercise) }

      it 'has weight and weight unit if kind is Weight Lifting' do
        exercise.should be_weight
        exercise.time.should be_nil
      end

    end

    context 'with an aerobic exercise' do
      let(:exercise) { FactoryGirl.create(:aerobic_exercise) }

      it 'has time but not weight etc. if kind is Cardio' do
        exercise.should be_time
        exercise.reps.should be_nil
      end

    end        

  end

end

注意 context 只是describe 的别名。

Answer 2

let 方法不是来自 FactoryGirl，它来自 Rspec，问题是 let 不应该嵌套在 it 中，它应该在它之外使用。

鉴于您编写它的方式，我认为您应该只使用这样的局部变量：

describe Exercise do
  describe 'Exercise properly normalizes values' do
    it 'has weight and weight unit if kind is Weight Lifting' do
      exercise = FactoryGirl.create(:lifting_exercise)
      exercise.should be_weight
      exercise.time.should be_nil
    end
    it 'has time but not weight etc. if kind is Cardio' do
      exercise = FactoryGirl.create(:aerobic_exercise)
      exercise.should be_time
      exercise.reps.should be_nil
    end
  end
end

此外，鉴于您已将 FactoryGirl::Syntax::Methods 包含在您的 spec_helper 中，您无需在所有内容前加上 FactoryGirl，您可以这样称呼它：

exercise = create(:lifting_exercise)

希望对你有帮助！

-乍得