ruby-on-rails - RSpec + Sidekiq : NoMethodError: undefined method 'jobs' MyImportJob

Question

我正在尝试在 Rails 4.2.4 应用程序中为 RSpec + Sidekiq 编写一些规范，但遇到了一些问题。

我的代码是这样的:

class MyImportJob
  include Sidekiq::Worker
  sidekiq_options queue: :default

  def perform(params)
    # Do magic
  end
end

和规范:

describe MyImportJob, type: :job do
  let(:panel) { create(:panel) }

  describe '#perform' do
    context 'unsuccessfully' do
      it 'raises ArgumentError if no panel param was passed' do
        expect {subject.perform_async()}.to raise_error(ArgumentError)
      end
    end

    context 'successfully' do
      it 'given a panel, it increases the job number' do
        expect {
          subject.perform_async(panel_id: panel.id)
        }.to change(subject.jobs, :size).by(1)
      end
    end
  end
end

但我收到以下错误:

Failure/Error: }.to change(subject.jobs, :size).by(1)
  NoMethodError:
    undefined method `jobs' for #<MyImportJob:0x007f80b74c5c18>

和

Failure/Error: expect {subject.perform_async()}.to raise_error(ArgumentError)
  expected ArgumentError, got #<NoMethodError: undefined method `perform_async' for #<MyImportJob:0x007f80b6d73f50>>

我相信 perform_async 应该由 Sidekiq 默认提供，只要我在我的 worker 中包含行 include Sidekiq::Worker ，这是正确的吗？如果我只使用 perform，第一个测试会通过，但我希望它能通过 perform_async，这正是我在我的代码库中使用的。

至于第二个，我不明白为什么测试对象没有方法jobs。有什么线索吗？

我的 rails_helper.rb 文件有:

require 'sidekiq/testing'
Sidekiq::Testing.fake!

提前致谢!

Answer 1

如果您没有明确定义subject，rspec 将按照以下规则创建主题:

By default, if the first argument to an outermost example group (describe or context block) is a class, RSpec creates an instance of that class and assigns it to the subject

引用:What's the difference between RSpec's subject and let? When should they be used or not?

这意味着它会创建您的 worker 的实例。这样就不能调用perform_async 和jobs。

要解决您的问题，请明确定义如下:

describe MyImportJob, type: :job do
  let(:panel) { create(:panel) }

  subject { MyImportJob }

  describe '#perform' do
    context 'unsuccessfully' do
      it 'raises ArgumentError if no panel param was passed' do
        expect {subject.perform_async()}.to raise_error(ArgumentError)
      end
    end

    context 'successfully' do
      it 'given a panel, it increases the job number' do
        expect {
          subject.perform_async(panel_id: panel.id)
        }.to change(subject.jobs, :size).by(1)
      end
    end
  end
end