Question

我试图在模型中删除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

这是规范：

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:

我用Google搜索了这个，但我无法弄清楚为什么RSpec会将sftp.file.open视为私有方法......

提前感谢任何想法！

Answer 1

所以，我想到了发生了什么 - 我没有将open（）方法描述为@sftp_mock对象的一部分，所以@sftp.file.open看起来像一个私有方法。修复此问题需要让@ sftp_mock.file返回@sftp_mock，以便它可以链接到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)

我也错过了@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

这个其他stackoverflow问题帮助我理解了这个概念：Stub chain together with should_receive

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

RSpec：stubbing SFTP - 私有方法调用

1 个答案: