Rspec 无法检测到 activerecord 方法链中的方法调用答案

【问题标题】：Rspec cannot detect method call in activerecord method chainRspec 无法检测到 activerecord 方法链中的方法调用
【发布时间】：2015-07-22 23:36:00
【问题描述】：

我有以下控制器动作：

def index
    @companies = Company.order(:name).includes(:team_members, :user)

    if params[:search].present?
      @companies = @companies.where('name ilike ?', "%#{params['search']}%")
    end
end

以及相应的 rspec 测试：

before :each do
  allow(Company).to receive(:where)

  get :index, search: 'search_query'
end

it 'filters the companies by the search parameter' do
  expect(Company).to have_received(:where).with('name ilike "%search_query%"')
end

但是 rspec 没有检测到在 Company 类上调用了“where”方法。我收到以下错误：

1) CompaniesController GET #index when search parameter is given filters the companies by the search parameter
     Failure/Error: expect(Company).to have_received(:where).with('name ilike "%search_query%"')
       (Company(id: integer, name: string, description: text, season: string, iac_rating: float, funding_history: text, smart_scores: float, created_at: datetime, updated_at: datetime, logo: string, website: string, summary: text, pitch_deck: string, executive_summary: string, unique_factor: text, revenue_burn_rate: text, growth: text, category: string, typical_check_size: string, raising_amount: string, committed_amount: string, hq_location: string, sector: string, num_full_time_founders: string, user_id: integer, display_order: integer) (class)).where("name ilike \"%search_query%\"")
           expected: 1 time with arguments: ("name ilike \"%search_query%\"")
           received: 0 times

测试这个的正确方法是什么？谢谢！

【问题讨论】：

标签： ruby-on-rails activerecord rspec

【解决方案1】：

收到的是 @companies 而不是 Company :where。
在您的测试代码中，您必须显示模拟如何从 Company 下降，就像在真实代码中 @companies 从 Company 下降一样。这对于让 RSpec 匹配 @companies 及其各自的模拟 @companies_mock 是必要的。

  before :each do
    @companies_mock = double('Company')
    @intermediate_mock = double('Company')

    allow(Company).to receive(:order).and_return @intermediate_mock
    allow(@intermediate_mock).to receive(:includes).and_return @companies_mock

    allow(@companies_mock).to receive(:where)

    get :index, search: 'search_query'
  end

  it 'filters the companies by the search parameter' do
    expect(@companies_mock).to have_received(:where).with('name ilike ?', "%search_query%")
  end

距离您的提问已经过去了一段时间。希望你会发现它有用。

【讨论】：