Question

我似乎无法通过此测试，但我不明白为什么。

controller_spec.rb：

require 'rails_helper'

RSpec.describe QuotationRequestsController, type: :controller do

  describe "GET download" do    
    it "streams the sample text as a text file" do
      #setup
      quotation_request = create(:quotation_request)
      file_options = {filename: "#{quotation_request.id}-#{quotation_request.client.name.parameterize}.txt", type: 'plain/text', disposition: 'attachment'}

      #exercise
      get :download, id: quotation_request

      #verification
      expect(@controller).to receive(:send_data).with(file_options) {@controller.render nothing: true}      
    end
  end
end

控制器：

def download
  @quotation_request = QuotationRequest.find(params[:id])
  send_data @quotation_request.sample_text, {
    filename: @quotation_request.sample_text_file, 
    type: "text/plain",
    disposition: "attachment"
  }
end

测试结果：

1) QuotationRequestsController GET download streams the sample text as a text file
  Failure/Error: expect(@controller).to receive(:send_data).with(file_options) {
    @controller.render nothing: true
  }       
  (# <QuotationRequestsController:0x007ff35f926058>).send_data({
    :filename=>"1-peter-johnson.txt",
    :type=>"plain/text",
    :disposition=>"attachment"
  })  
  expected: 1 time with arguments: ({
    :filename=>"1-peter-johnson.txt",
    :type=>"plain/text", :disposition=>"attachment"
  })
  received: 0 times
  # ./spec/controllers/quotation_requests_controller_spec.rb:380:in `block (3 levels) in <top (required)>'
  # -e:1:in `<main>'

Answer 1

你应该传递2个参数 expect(@controller).to receive(:send_data).with(quotation_request.sample_text, file_options) {@controller.render nothing: true}

Answer 2

  #exercise
  get :download, id: quotation_request

  #verification
  expect(@controller).to receive(:send_data).with(file_options) {@controller.render nothing: true}

这是倒退的。期望应该在方法调用之前。

Answer 3

您写下以下内容：

获取档案
模拟文件

但正确的情况是倒置的：

模拟文件
获取档案

尝试关注（使用before）：

require 'rails_helper'

RSpec.describe QuotationRequestsController, type: :controller do
  describe "GET download" do   
    let(:quotation_request) { create(:quotation_request) }
    let(:file_options) { {filename: "#{quotation_request.id}-#{quotation_request.client.name.parameterize}.txt", type: 'plain/text', disposition: 'attachment'} }

    before do
      expect(@controller).to receive(:send_data)
         .with(file_options) { @controller.render nothing: true }
    end

    it "streams the sample text as a text file" do
      get :download, id: quotation_request
    end
  end
end

Answer 4

Rails 5：

expect(@controller).to receive(:send_data).with(quotation_request.sample_text, file_options) {@controller.head :ok}

参考：https://stackoverflow.com/a/43428992

Rspec send_data测试未通过

4 个答案: