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RSpec:存根SFTP-称为私有方法

[英]RSpec: stubbing SFTP - private method called

我正在尝试在模型中存根SFTP。 这是模型:

class BatchTask
  require 'net/sftp'

  def get_file_stream(host, username, password, path_to_dir, filename)
    raise ArgumentError if host.nil? or username.nil? or password.nil? or path_to_dir.nil? or filename.nil?
    file_stream = nil
    Net::SFTP.start(host, username, password) do |sftp|
      sftp.dir.glob(path_to_dir, filename) do |entry|
        # Verify the directory contents
        raise RuntimeError(true), "file: #{path_to_dir}/#{filename} not found on SFTP server" if entry.nil?
        file_stream = sftp.file.open("#{path_to_dir}/#{entry.name}")
      end
    end
    file_stream
  end

end

规格如下:

require 'spec_helper'

describe "SftpToServer" do
  let(:ftp) { BatchTask::SftpToServer.new }

 it "should return a file stream" do
    @sftp_mock = mock('sftp')
    @entry = File.stubs(:reads).with("filename").returns(@file)
    @entry_mock = mock('entry')
    @entry_mock.stub(:name).and_return("filename")
    @sftp_mock.stub_chain(:dir, :glob).and_yield(@entry_mock)
    Net::SFTP.stub(:start).and_yield(@sftp_mock)
    @sftp_mock.stub_chain(:file, :open).with("filename").and_yield(@file)

    ftp.get_file_stream("ftp.test.com", "user", "password", "some/pathname", "filename").should be_kind_of(IO)
  end

end

这是堆栈跟踪:

NoMethodError in 'SftpToServer should return a file stream'
private method `open' called for #<Object:0x10c572620>
/Users/app/models/batch_task/sftp_to_server.rb:12:in `get_file_stream'
/Users/app/models/batch_task/sftp_to_server.rb:9:in `get_file_stream'
/Users/app/models/batch_task/sftp_to_server.rb:8:in `get_file_stream'
./spec/models/batch_task/sftp_to_server_spec.rb:15:

我已经用谷歌搜索过,但是我不知道为什么RSpec会将sftp.file.open视为私有方法...

预先感谢您的任何想法!

因此,我知道发生了什么-我没有将open()方法描述为@sftp_mock对象的一部分,因此@ sftp.file.open看起来像一个私有方法。 要解决此问题,需要使@ sftp_mock.file返回@sftp_mock,以便可以将其链接到open()方法,如下所示:

@sftp_mock.stub!(:file) { @sftp_mock }
@sftp_mock.should_receive(:open).with("some/pathname/filename").and_return(@file)

我也缺少@file声明...完整的spec文件是:

require 'spec_helper'

describe "SftpToServer" do
  let(:ftp) { BatchTask::SftpToServer.new }

 it "should return a file stream" do
    @file = File.new("#{RAILS_ROOT}/spec/files/express_checkout_tdr.csv", "r")
    @sftp_mock = mock('sftp')
    @entry = File.stubs(:reads).with("filename").returns(@file)
    @entry_mock = mock('entry')
    @entry_mock.stub(:name).and_return("filename")
    @sftp_mock.stub_chain(:dir, :glob).and_yield(@entry_mock)
    Net::SFTP.stub(:start).and_yield(@sftp_mock)
    @sftp_mock.stub!(:file) { @sftp_mock }
    @sftp_mock.should_receive(:open).with("some/pathname/filename").and_return(@file)

    ftp.get_file_stream("ftp.test.com", "user", "password", "some/pathname", "filename").should be_kind_of(IO)
  end

end

这个另一个stackoverflow问题帮助了我这个概念: 存根链和should_receive一起

另外,如果有更好的模拟和存根SFTP的方法,请随时发表评论。 这个规范的例子有点丑陋!

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