如何在原始应用程序中测试狂欢装饰器？

Question

我正在使用 Spree 制作名为“MyApp”的 Rails 应用程序，并尝试使用 RSpec 进行测试。

我阅读了 Spree Test App Document，并尝试使用 RSpec 进行测试。

但我有错误

~/r/d/MyApp ❯❯❯ bundle exec rspec                                                             

An error occurred while loading ./spec/controllers/spree/home_controller_spec.rb.
Failure/Error:
  describe Spree::HomeController, type: :controller do
    it "render index template" do
      get :index
      response.should render_template(:index)
    end
  end

NameError:
  uninitialized constant Spree
# ./spec/controllers/spree/home_controller_spec.rb:3:in `<top (required)>'
No examples found.

Finished in 0.0004 seconds (files took 0.146 seconds to load)
0 examples, 0 failures, 1 error occurred outside of examples

NameError: 未初始化的常量 Spree 我认为发生这个错误是因为它只定义了装饰器。 原始控制器在 Spree gem(core, backend, frontend ...etc)中定义。

详细代码如下：

MyApp/app/controllers/home_controller_decorator.rb

Spree::HomeController.class_eval do
  def index
    do_something
  end
end

MyApp/specs/controllers/home_controller_spec.rb

require 'spec_helper'

describe Spree::HomeController do
  it "render index template" do
    get :index
    response.should render_template(:index)
  end
end

MyApp/spec/spec_helper.rb

RSpec.configure do |config|
  config.expect_with :rspec do |expectations|
    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end

  config.mock_with :rspec do |mocks|
    mocks.verify_partial_doubles = true
  end

  config.shared_context_metadata_behavior = :apply_to_host_groups
  config.disable_monkey_patching!
  config.order = :random
  Kernel.srand config.seed
end

如何测试我的装饰器原始逻辑？ 我应该在哪里写代码？ 无法测试 MyApp/spec 目录？

也许我对 Spree Test 有误解。

请给我提示。 谢谢。

Answer 1

问题

它没有加载 Rails，所以它看不到 Spree。

解决方案

MyApp/specs/controllers/home_controller_spec.rb

代替

require 'spec_helper'

describe Spree::HomeController do
  # ...

你需要

require 'rails_helper'

describe Spree::HomeController do
  # ...

更多信息

• spec_helper 旨在设置 RSpec 以准备测试普通 Ruby 对象
• 如果您的测试代码位于 lib 文件夹中并且不依赖于 Rails，则可以这样做
• 由于Spree完全依赖Rails，需要通过require 'rails_helper'加载Rails
• rails_helper 也需要 spec_helper 但反过来不正确
• rails_helper 的加载速度比 spec_helper 慢得多，正是因为它启动了 Rails

rails_helper的剖析

• Rails 5 版本
• 您的 rails_helper 可能看起来不一样

# Load spec_helper
require 'spec_helper'

# Setup Rails to run in test mode
ENV['RAILS_ENV'] ||= 'test'

# This is the magic line that runs Rails. Check out config/environment.rb.
require File.expand_path('../../config/environment', __FILE__)

# Guard against running any tests in production mode
abort("The Rails environment is running in production mode!") if Rails.env.production?

# Load all the rspec rails related goodness
require 'rspec/rails'

# Make sure the migrations are up to date
begin
  ActiveRecord::Migration.maintain_test_schema!
rescue ActiveRecord::PendingMigrationError => e
  puts e.to_s.strip
  exit 1
end