在Rspec 3.5中使用搶救時如何獲得覆蓋，並使用非VCR的存根重試？

Question

我試圖覆蓋我所附規范中以下代碼部分。 該項目更喜歡在VCR上使用存根，並且阻止了外部API請求。 是否有人對如何解決此問題以獲得所需的覆蓋范圍有任何想法？

我將睡眠測試注釋掉了，因為它失敗了。

碼

  def first_page
    client.list_orders(created_before: created_before,
                       created_after: created_after,
                       max_results_per_page: max_results_per_page)
  rescue Excon::Error::ServiceUnavailable => error
    log_error(error, 'amazon_mws.errors.orders.first_page') unless (self.retries -= 1).positive?
    add_api_delay
    retry
  end

  def next_page(next_token)
    client.list_orders_by_next_token(next_token)
  rescue Excon::Error::ServiceUnavailable => error
    log_error(error, 'amazon_mws.errors.orders.next_page') unless (self.retries -= 1).positive?
    add_api_delay
    retry
  end

  def add_api_delay
    sleep(Configurations.amazon_mws['orders']['response_timer_in_seconds'])
  end

規格

  describe '.poll_for_order_items' do
    context 'multiple pages' do
      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_return(body: next_page, status: 200, headers: { 'Content-Type': 'text/xml' })

        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItemsByNextToken&).*$/)
          .to_return(body: first_page, status: 200, headers: { 'Content-Type': 'text/xml' })
      end

      context 'with sleep stubbed' do
        before do
          allow(subject).to receive(:add_api_delay).and_return(true)
        end

        it 'returns array collection' do
          expect(subject.poll_for_order_items).to be_kind_of(Array)
        end

        it 'returns array data' do
          expect(subject.poll_for_order_items.length).to be > 0
        end
      end

      # context 'with sleep set' do
      #   it 'should call sleep' do
      #     allow(Kernel).to receive(:sleep).and_return(1)
      #     expect(subject).to receive(:sleep).and_return(1)
      #     subject.poll_for_order_items
      #   end
      # end
    end

    context 'single page' do
      before(:each) do
        stub_request(:any, /.*amazonservices.com.*/).to_return(body: first_page, status: 200, headers: { 'Content-Type': 'text/xml' })
        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'returns array' do
        expect(subject.poll_for_order_items).to be_kind_of(Array)
      end

      it 'returns array data' do
        expect(subject.poll_for_order_items.length).to be > 0
      end
    end

    context 'collector' do
      before(:each) do
        stub_request(:any, /.*amazonservices.com.*/).to_return(body: first_page_single, status: 200, headers: { 'Content-Type': 'text/xml' })
        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'returns array when non array returned' do
        expect(subject.poll_for_order_items).to be_kind_of(Array)
      end
    end
  end

  describe 'raises errors' do
    context '.parse' do
      let(:error_raised) { I18n.t('amazon_mws.errors.parse_payload') }

      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_return(body: {}.to_json, status: 200, headers: { 'Content-Type': 'text/xml' })
      end

      it 'raises error' do
        expect { subject.new } .to raise_error(StandardError)
      end
    end

    context '.first_page' do
      let(:error_raised) { I18n.t('amazon_mws.errors.order_items.first_page') }

      before do
        allow(MWS).to receive_message_chain(:orders, :list_order_items).and_raise(error_raised)
      end

      it 'raises error on first listing page' do
        expect { subject.new } .to raise_error(StandardError)
      end
    end

    context '.next_page' do
      let(:error_raised) { I18n.t('amazon_mws.errors.order_items.next_page') }

      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_return(body: next_page, status: 200, headers: { 'Content-Type': 'text/xml' })

        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItemsByNextToken&).*$/)
          .and_raise(error_raised)

        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'raises error on nexst listing page' do
        expect { subject.poll_for_order_items } .to raise_error(StandardError)
      end
    end
  end

覆蓋率報告

Answer 1

我只看到您期望它會引發錯誤。 如果超時，則應至少調用一次log_error和add_api_delay 。 由於這些基本上是副作用，因此您可能只需要測試它們在這種情況下被調用的情況，並且覆蓋率報告應對此有所了解。

嘗試添加期望，例如： expect(subject).to have_received(:log_error).at_least(:once)

編輯：帶外談論它，我們了解到大多數覆蓋問題都可以通過確保出現錯誤來解決。

before do stub_request(:any, /.*amazonservices.com.*/) .with(body: /^.*(&Action=ListOrders&).*$/) .to_raise(Excon::Error::ServiceUnavailable) end

Answer 2

經過以上@wobh的研究和啟發，我想到了以下內容...

  describe '.poll_for_order_items' do
    context 'multiple pages' do
      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_return(body: next_page, status: 200, headers: { 'Content-Type': 'text/xml' })

        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItemsByNextToken&).*$/)
          .to_return(body: first_page, status: 200, headers: { 'Content-Type': 'text/xml' })
      end

      context 'with sleep stubbed' do
        before do
          allow(subject).to receive(:add_api_delay).and_return(true)
        end

        it 'returns array collection' do
          expect(subject.poll_for_order_items).to be_kind_of(Array)
        end

        it 'returns array data' do
          expect(subject.poll_for_order_items.length).to be > 0
        end
      end
    end

    context 'single page' do
      before(:each) do
        stub_request(:any, /.*amazonservices.com.*/).to_return(body: first_page, status: 200, headers: { 'Content-Type': 'text/xml' })
        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'returns array' do
        expect(subject.poll_for_order_items).to be_kind_of(Array)
      end

      it 'returns array data' do
        expect(subject.poll_for_order_items.length).to be > 0
      end
    end

    context 'collector' do
      before(:each) do
        stub_request(:any, /.*amazonservices.com.*/).to_return(body: first_page_single, status: 200, headers: { 'Content-Type': 'text/xml' })
        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'returns array when non array returned' do
        expect(subject.poll_for_order_items).to be_kind_of(Array)
      end
    end
  end

  describe 'raises errors' do
    context '.parse' do
      let(:error_raised) { I18n.t('amazon_mws.errors.parse_payload', error: 'TEST') }

      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_return(body: {}.to_json, status: 200, headers: { 'Content-Type': 'text/xml' })
      end

      it 'raises error' do
        expect { subject.poll_for_order_items } .to raise_error(StandardError)
      end

      it 'raises correct error message' do
        expect { subject.poll_for_order_items } .to raise_error(/payload/)
      end
    end

    context '.first_page' do
      let(:error_raised) { I18n.t('amazon_mws.errors.order_items.first_page', error: 'TEST') }

      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_raise(Excon::Error::ServiceUnavailable)
        subject.instance_variable_set(:@retry_limit, 1)
        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'raises error on first listing page' do
        expect { subject.poll_for_order_items } .to raise_error(StandardError)
      end

      it 'raises correct error message' do
        expect { subject.poll_for_order_items } .to raise_error(/order item first/)
      end
    end

    context '.next_page' do
      let(:error_raised) { I18n.t('amazon_mws.errors.order_items.next_page', error: 'TEST') }

      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_return(body: next_page, status: 200, headers: { 'Content-Type': 'text/xml' })

        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItemsByNextToken&).*$/)
          .to_raise(Excon::Error::ServiceUnavailable)
        subject.instance_variable_set(:@retry_limit, 1)
        allow(subject).to receive(:add_api_delay).and_return(true)
      end

      it 'raises error on next listing page' do
        expect { subject.poll_for_order_items } .to raise_error(StandardError)
      end

      it 'raises correct error message' do
        expect { subject.poll_for_order_items } .to raise_error(/order item next/)
      end
    end

    context '.add_api_delay' do
      before do
        stub_request(:any, /.*amazonservices.com.*/)
          .with(body: /^.*(&Action=ListOrderItems&).*$/)
          .to_raise(Excon::Error::ServiceUnavailable)

        subject.instance_variable_set(:@retries, 2)
        subject.instance_variable_set(:@retry_limit, 1)
        subject.instance_variable_set(:@retry_delay, 1)
      end

      it 'sleeps retry api calls' do
        allow(Kernel).to receive(:sleep).and_return(1)
        expect(subject).to receive(:sleep).and_return(1)
        expect { subject.poll_for_order_items } .to raise_error(StandardError)
      end
    end
  end

這導致100％的覆蓋率！