如何通过其他模型创建集成测试

Question

1) 我有这个模范职位和模范机构

class Job < ApplicationRecord
  belongs_to :institution
  # others attibutes
end

2) 这是我在 JobsController 上创建的操作 - 我需要一个机构来创建工作。没关系。

def create
    build_job
    save_job || render(:new, status: :unprocessable_entity)
end

3) 这是我创建的集成测试 我没有通过成功测试

在参数中 -I also tried institution: @institution -and also tried institution_id: @institution.id

require 'test_helper'

class JobActionsTest < ActionDispatch::IntegrationTest
  setup do
    @user = users(:standard)
    sign_in @user
    @institution = institutions(:standard)
  end

  test "can create a job through institution" do
    get new_institution_job_path(@institution)
    assert_response :success

    assert_difference('Job.count') do
      post jobs_path, 
           params: {job: {title: "Desenvolvedor", description: "Ruby",
                          requirements: "rspec and capybara", 
                          start_date: Date.today, 
                          end_date: Date.today + 5.days, 
                          institution: @institution.id}}
    end

    assert_response :redirect
    follow_redirect!
    assert_response :success
  end
end

4) 这是我的控制台错误

#Running:
E

Error:
JobActionsTest#test_can_create_a_job_through_institution:
ActiveRecord::RecordNotFound: Couldn't find Institution with 'id'=
    app/controllers/jobs_controller.rb:74:in `job_scope'
    app/controllers/jobs_controller.rb:52:in `build_job'
    app/controllers/jobs_controller.rb:18:in `create'
    test/integration/job_actions_test.rb:22:in `block (2 levels) in <class:JobActionsTest>'
    test/integration/job_actions_test.rb:21:in `block in <class:JobActionsTest>'


bin/rails test test/integration/job_actions_test.rb:17

Answer 1

从正确嵌套jobs 资源开始：

resources :institutions do
  resources :jobs, only: [:new, :create]
end

# or to create the full suite
resources :institutions do
  resources :jobs, shallow: true
end

这将给出这些路线：

             Prefix Verb URI Pattern                                      Controller#Action
   institution_jobs POST /institutions/:institution_id/jobs(.:format)     jobs#create
new_institution_job GET  /institutions/:institution_id/jobs/new(.:format) jobs#new
...

请注意，:institution_id 现在是创建路由的 URI 模式的一部分，它将以 params[:institution_id] 的形式提供。

在您的测试中，您想 POST 到 /institutions/:institution_id/jobs：

require 'test_helper'

class JobActionsTest < ActionDispatch::IntegrationTest
  setup do
    @user = users(:standard)
    sign_in @user
    @institution = institutions(:standard)
  end

  # Use separate examples per route / case
  test "can fill in form to create a new job" do
     get new_institution_job_path(@institution)
     assert_response :success
  end

  test "can create a job through institution" do
    assert_difference ->{ @institution.jobs.count } do
      post institution_jobs_path(@institution), 
           params: { 
             job: {
               title: "Desenvolvedor", 
               description: "Ruby",
               requirements: "rspec and capybara", 
               start_date: Date.today, 
               end_date: Date.today + 5.days
             }
           }
    end
    assert_redirected_to @institution.jobs.last
    follow_redirect!
    assert_response :success
  end
end

您还想测试该职位实际上是为正确的机构创建的。我们通过传递 lambda ->{ @institution.jobs.count } 来做到这一点。

并且用户被重定向到正确的资源 - 而不仅仅是某个地方 - 这是通过 assert_redirected_to @institution.jobs.last 完成的。

Answer 2

在第 22 行调用时看起来像这样

get new_institution_job_path(@institution)

您在setup 块中构建的@institution 对象未保存在数据库中。

您收到的错误 ActiveRecord::RecordNotFound 表示找不到 ID 为 nil 的机构。

您可以通过添加此断言轻松检查我的猜测是否正确：

  test "can create a job through institution" do
    assert_not_nil(@institution.id) # or assert_not_equal(0, Institution.where(id: @institution.id).size)
    get new_institution_job_path(@institution)
    assert_response :success
    #...
  end

确保您的 institutions(:standard) 方法看起来像 Institution.create!() 而不是 Institution.new 或 Institution.build