如何在 Rails 中为集成测试编写帮助程序？

Question

如何编写用于多个集成测试的集成测试助手？我已经尝试了以下错误。我正在考虑创建一个基类并对其进行扩展，但我不明白“test_helper”是如何工作的！我不能将辅助方法放在 test_helper 中，因为它们使用特殊的集成辅助方法，例如 post_with_redirect。

LS

$ ls test/integration
integration_helper_test.rb  post_integration_test.rb  user_flows_test.rb

代码，integration_helper_test.rb

class IntegrationHelperTest < ActionDispatch::IntegrationTest

  def login(user)
    ...

代码，post_integration_test.rb

require 'test_helper'
require 'integration_helper_test'
# require 'integration/integration_helper_test'

class PostIntegrationTest < ActionDispatch::IntegrationTest
  # include IntegrationHelperTest

错误

$ rake
rake aborted!
cannot load such file -- integration_helper_test
C:/Users/Chloe/workspace/SeenIt/test/integration/post_integration_test.rb:2:in `<top (required)>'
Tasks: TOP => test:run => test:integration

代码，post_integration_test.rb

require 'test_helper'
# require 'integration_helper_test'
require 'integration/integration_helper_test'

class PostIntegrationTest < ActionDispatch::IntegrationTest

错误

  1) Error:
PostIntegrationTest#test_should_create_post:
NoMethodError: undefined method `login' for #<PostIntegrationTest:0x3da81d0>
    test/integration/post_integration_test.rb:20:in `block in <class:PostIntegrationTest>'

代码，post_integration_test.rb

require 'test_helper'
# require 'integration_helper_test'
#require 'integration/integration_helper_test'

class PostIntegrationTest < ActionDispatch::IntegrationTest
  include IntegrationHelperTest

错误

$ rake
rake aborted!
wrong argument type Class (expected Module)
C:/Users/Chloe/workspace/SeenIt/test/integration/post_integration_test.rb:6:in `include'
C:/Users/Chloe/workspace/SeenIt/test/integration/post_integration_test.rb:6:in `<class:PostIntegrationTest>'
C:/Users/Chloe/workspace/SeenIt/test/integration/post_integration_test.rb:5:in `<top (required)>'
Tasks: TOP => test:run => test:integration

test_helper.rb

ENV["RAILS_ENV"] ||= "test"
require File.expand_path('../../config/environment', __FILE__)
require 'rails/test_help'

class ActiveSupport::TestCase
  ActiveRecord::Migration.check_pending!

Answer 1

name_helper_test.rb 文件不用于通用代码，这些文件用于您的助手的测试用例。

根据以 _test.rb 结尾的Rails Testing Guide 文件用于测试用例，您应该在该文件中编写测试，因为 rake 任务从 _test.rb 检测那是测试的文件ID。因此，如果您想添加一些通用代码，test_helper.rb 可以满足您的需求。您甚至可以为辅助方法定义自己的文件，有关常见测试代码的进一步指导请阅读A Guide for Writing Maintainable Rails Tests。

注意：上述答案中的问题是您在类之外的 test_helper.rb 中编写代码，并且由于使用require，所有方法都可以在其他文件中使用，因为它们都需要 test_helper.rb。

Answer 2

选择一个：

module IntegrationHelperTest 
  # ...
end

require 'test_helper'
require 'integration/integration_helper_test'
class PostIntegrationTest < ActionDispatch::IntegrationTest
  include IntegrationHelperTest
  # ...
end

或

class IntegrationHelperTest < ActionDispatch::IntegrationTest
  # ...
end

require 'test_helper'
require 'integration/integration_helper_test'
class PostIntegrationTest < IntegrationHelperTest
  # ..
end