为什么我在简单的类中得到“Undefined method :: new”？

I am writing an ATM-system-like socket/server solution. I would appreciate if someone could tell me what I'm missing. For some reason, I get the following error running my stub test suite:

我正在编写类似ATM系统的套接字/服务器解决方案。如果有人能告诉我我错过了什么，我将不胜感激。出于某种原因，运行我的存根测试套件时出现以下错误：

# Running tests:

.E

Finished tests in 0.002411s, 829.4384 tests/s, 414.7192 assertions/s.

  1) Error:
test_0001_connects_to_a_host_with_a_socket(AtmClient::connection):
NoMethodError: undefined method `new' for #<SpoofServer:0x9dce2dc @clients=[], @server=#<TCPServer:fd 5>>
    /media/wildfyre/Files/Programming/KTH/progp/Atm/spec/client/SpoofServer.rb:12:in `start'
    /media/wildfyre/Files/Programming/KTH/progp/Atm/spec/client/client_spec.rb:12:in `block (3 levels) in <top (required)>'

2 tests, 1 assertions, 0 failures, 1 errors, 0 skips

My minispec file is:

我的minispec文件是：

require_relative '../spec_helper.rb'
require_relative '../../lib/AtmClient.rb'
require_relative 'SpoofServer.rb'

describe AtmClient do
  it "can be created with no arguments" do
    AtmClient.new.must_be_instance_of AtmClient
  end

  describe 'connection' do
    it "connects to a host with a socket" do
      spoof = SpoofServer.new.start
      client = AtmClient.new.connect
      spoof.any_incoming_connection?.must_be true
      spoof.kill
    end
  end
end

My SpoofServer file is:

我的SpoofServer文件是：

require 'socket'

class SpoofServer

  def initialize
  end

  def start
    @clients = []
    @server = TCPServer.new 1234

    @listener_thread = new Thread do
      @clients.add @server.accept
    end
  end

  def any_incoming_connection?
    @clients.size > 0
  end

  def kill
    @listener_thread.exit
    @clients.each {|c| c.close}
  end

end

2 个解决方案

#1

As you can read in the trace of the calls stack:

正如您可以在调用堆栈的跟踪中阅读：

NoMethodError: undefined method `new' for #<SpoofServer:...>
    /.../spec/client/SpoofServer.rb:12:in `start'

The error is inside the start method defined in SpoofServer.rb, at line 12, the wrong line is:

错误在SpoofServer.rb中定义的start方法内，在第12行，错误的行是：

@listener_thread = new Thread do

That should be:

那应该是：

@listener_thread = Thread.new do

As you have written it, what you are actually doing is to calling the new method passing the Thread class as argument. Since no new method is defined for instances of the SpoofServer class you get the NoMethodError exception.

正如您所编写的那样，您实际执行的操作是调用将Thread类作为参数传递的新方法。由于没有为SpoofServer类的实例定义新方法，因此会出现NoMethodError异常。

#2

In body of instance method SpoofServer#start, you can't call the class method SpoofServer.new by new.

在实例方法SpoofServer #start的主体中，你不能用new调用类方法SpoofServer.new。

#1