如何使用 Rspec / Rails 5.2 在分层父子关系中测试子创建？

Question

我的应用程序管理 BusinessFlows，它只能在父 BusinessArea 中创建。 BusinessFlows 控制器中的“新”方法是：

  def new
    @business_area = BusinessArea.find(params[:business_area_id])
    @business_flow = BusinessFlow.new
  end

用于测试的 Factory 工作正常，并按预期创建父 BusinessArea 和 BusinessFlow：

FactoryBot.define do
  factory :business_flow do
    association :parent,  factory: :business_area
    playground_id       {0}
    name                {"Test Business Flow"}
    code                {Faker::Code.unique.rut}
    description         {"This is a test Business Flow used for unit testing"}
    created_by          {"Fred"}
    updated_by          {"Fred"}
    owner_id            {0}
    responsible_id      {0}
    deputy_id           {0}
    organisation_id     {0}
    status_id           {0}
  end
end

但是在测试是否可以显示“新”视图时，控制器由于缺少参数[:business_area_id]而引发错误：

 ActiveRecord::RecordNotFound:
   Couldn't find BusinessArea without an ID

这里是功能测试脚本：

require 'rails_helper'

RSpec.describe BusinessFlow, type: :request do
  include Warden::Test::Helpers

  describe "Business Flows pages: " do
    let(:bf) {FactoryBot.create(:business_flow)}

    context "when not signed in " do
      it "should propose to log in when requesting index view" do
        get business_flows_path
        follow_redirect!
        expect(response.body).to include('Sign in')
      end
      it "should propose to log in when requesting new view" do
        get new_business_flow_path
        follow_redirect!
        expect(response.body).to include('Sign in')
      end
      it "should propose to log in when requesting edit view" do
        get edit_business_flow_path(bf)
        follow_redirect!
        expect(response.body).to include('Sign in')
      end
      it "should propose to log in when requesting show view" do
        get business_flow_path(bf)
        follow_redirect!
        expect(response.body).to include('Sign in')
      end
    end
    context "when signed in" do
      before do
        get "/users/sign_in"
        test_user = FactoryBot.create(:user)
        login_as test_user, scope: :user
      end
      it "should display index" do
        get business_flows_path
        expect(response).to render_template(:index)
      end
      it "should display new view" do
        get new_business_flow_path(bf.parent.id)
        expect(response).to render_template(:_form)
      end
      it "should display edit view" do
        get edit_business_flow_path(bf)
        expect(response).to render_template(:_form)
      end
      it "should display show view" do
        get business_flow_path(bf)
        expect(response).to render_template(:show)
      end
    end
  end
end

只有“登录时”上下文中的“新”方法测试失败。 你能帮我解决这个问题吗？

非常感谢！

Answer 1

 it "should display new view" do
     get new_business_flow_path(business_area_id: bf.parent)
     expect(response).to render_template(:_form)
 end

Rails 认为您传递的 id 是业务流程路径的一部分（实际上不是），我认为它需要作为参数传递。